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preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 1/41
FEATURES
Versatile 3+3 channel RS-422 line driver/receiver Pin configured as 6-ch. driver, or 3+3/4+2 ch. driver/receiver Pin configured as driver (6x) or driver/receiver (3x/3x or 4x/2x) Supports BiSS bus structure and BiSS bus loopback Unique Encoder Link mode: analog switches to bridge 9 lines Differential short-circuit-proof push-pull outputs Source/sink driving capability of 30 mA typ. at 3 V Reduced EMI due to output current limitation Output shutdown with undervoltage and overtemperature Suits various line impedances, allows 120Ω termination TTL-compatible hysteresis inputs Up to 10 MHz input/output frequency Open-drain error message output (NERR) Reverse polarity protection Reverse pol. protection of periphery by supply switch (60 mA) Operation from 3.0 V to 5.5 V Operating temperature range of -40 °C to +125 °C Space-saving 32-pin QFN package
APPLICATIONS
Differential cable driver Motion control encoders Control engineering Microcontroller peripheries BiSS Interface bus structures
PACKAGES
QFN32 5 mm x 5 mm
BLOCK DIAGRAM
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
DETECTION
OVERTEMP
REQUESTCONTROL
RS422I/O
RS422I/O
RS422I/O
FMSEL2
FMSEL1
1
3..5.5V
RS422
RS422
RS422
LOGIC
NERRI
GNDS
VDDS
NERR
BYPR
PoDo
PoDo
EBIS
EBIS
ECM
GND
VDD
OEN NQ1
NQ2
NQ6
NQ3
OVT
OVT
NQ1
PTC
NQ4
NQ5
BYP
1uF
BYP
BYP
NX1
NX2
1uF
BYP
NX3
1uF
TRI
TRI
TRI
Q3
Q1
Q4
Q1
Q6
Q2
Q5
X1
X2
X6
X4
X3
X5
1
+_
ECM
TRI
NQ5
NX3
BYP
FMSEL1
Q2
NQ1
Q4
BYP
Q6
Q3
X1Q1
NQ1
NQ2
VDD
GND
EBIS
GNDS
X5
NQ3
X2
PTC
NQ4
VDDS
NERR
TRI
X4
Q1
NX1
X3
FMSEL2
OEN
NERRI
EBIS
NX2
NQ6X6
Q5
Copyright © 2014, 2018 iC-Haus http://www.ichaus.com
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 2/41
DESCRIPTION
iC-HF is a robust line driver for industrial 5 V controlapplications featuring six differential output channels.
Single-ended, TTL-compatible input signals are trans-mitted as differential, 5 V RS-422 output signals at arate up to 10 MHz. The push-pull driver stages typi-cally provide 40 mA, present low saturation voltage,are current limited for reduced EMI emissions, andshort-circuit-proof.
iC-HF is protected against reverse polarity connection,disabling internal supply voltage and setting outputchannels to high impedance when reverse polarityconnection is detected. It offers a power-good switch,delivering up to 60 mA, that allows extended reversepolarity protection for connected sensors.
iC-HF supports Encoder Link. In this configurationinput signals are directly linked to output pins. Ana-
log signals from sensors can be accessed directly atoutput pins from iC-HF, allowing sensor calibrationand alignment. Up to 9 channels can be configuredas Encoder Link. Entering and exiting Encoder Linkconfiguration requires no additional line.
BiSS/SSI communication is supported throughRS-422 standard physical layer. iC-HF can also beincluded in a BiSS bus structure, and it can be config-ured as a bus termination node (BiSS bus loopback).
iC-HF protects against undervoltage and overtem-perature events. Output channels are left in highimpedance upon any of these events, and an error issignaled through the open drain output NERR. NERRis short-circuit protected.
Error signaling from sensor can be transferred viaNERRI/NERR pins.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 3/41
CONTENTS
PACKAGING INFORMATION 4PIN CONFIGURATION QFN32-5x5
(topview) . . . . . . . . . . . . . . . . . 4PACKAGE DIMENSIONS . . . . . . . . . . . 5
ABSOLUTE MAXIMUM RATINGS 6
THERMAL DATA 6
ELECTRICAL CHARACTERISTICS 7
CHANNEL DESCRIPTION 10Unidirectional channel . . . . . . . . . . . . . 10Bidirectional channel . . . . . . . . . . . . . . 10
FUNCTION DESCRIPTION 12A/B/Z and U/V/W Mode . . . . . . . . . . . . 12A/B/Z and BiSS/SSI mode . . . . . . . . . . . 12BiSS bus structure . . . . . . . . . . . . . . . 13BiSS bus loopback . . . . . . . . . . . . . . . 15
INTERNAL PROTECTION AND ERRORSIGNALING 18
REVERSE POLARITY PROTECTION 19
ENCODER LINK SEQUENCE 22iC-PTxxyy/ iC-PT-Hxxyy mode control . . . . 23
RS-422 RECEIVER CONFIGURATION 24Possible voltage ranges of RS-422 . . . . . . 24Unused/open RS-422 input pins . . . . . . . 25
APPLICATION EXAMPLES 26iC-PTxxyy/ iC-PT-Hxxyy . . . . . . . . . . . . 26iC-MH16, iC-MH8, iC-MHM . . . . . . . . . . 28iC-MU . . . . . . . . . . . . . . . . . . . . . . 30iC-NQC . . . . . . . . . . . . . . . . . . . . . 34
ADDITIONAL EXAMPLES 358 lines encoder operation for ABZ, BiSS and
5 V power supply . . . . . . . . . . . . . 35iC-MU with P2P BiSS and iC-HF in Encoder
Link State . . . . . . . . . . . . . . . . . 36iC-LNB with SPI and iC-HF in Encoder Link
State . . . . . . . . . . . . . . . . . . . . 37
DESIGN REVIEW 38
REVISION HISTORY 39
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 4/41
PACKAGING INFORMATION
PIN CONFIGURATION QFN32-5x5(topview)
12345678
9 10 11 12 13 14 15 16
1718192021222324
2526272829303132
<D-CODE><A-CODE>
<P-CODE>
PIN FUNCTIONSNo. Name Function
1 X5 Channel 5 positive input2 X4 Channel 4 positive input3 X3 Channel 3 positive input4 NX3 Channel 3 negative input5 OEN Output Enable input6 X2 Channel 2 positive input7 NX2 Channel 2 negative input8 X1 Channel 1 positive input9 NX1 Channel 1 negative input
10 Q1 Channel 1 positive output11 NQ1 Channel 1 negative output12 Q2 Channel 2 positive output13 NQ2 Channel 2 negative output14 Q3 Channel 3 positive output15 NQ3 Channel 3 negative output16 NERRI Error Input (low active)17 ECM Enable Encoder Link State input18 VDD Power Supply Voltage19 VDDS Switched Power Supply output20 GND Ground21 GNDS Switched Ground output22 FMSEL2 Function Mode Select 2 input23 FMSEL1 Function Mode Select 1 input24 PTC PT configuration output25 NERR Error Output (low active)26 NQ6 Channel 6 negative output27 Q6 Channel 6 positive output28 NQ5 Channel 5 negative output29 Q5 Channel 5 positive output30 NQ4 Channel 4 negative output31 Q4 Channel 4 positive output32 X6 Channel 6 positive inputBP Backside Paddle (GNDS)
The pin directions input and out-put are related to default operation,not to Encoder Link State or opera-tional mode.
IC top marking: <P-CODE> = product code, <A-CODE> = assembly code (subject to changes), <D-CODE> = date code (subject to changes);The Backside Paddle must be connected to GNDS.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 5/41
PACKAGE DIMENSIONS
5
5
TOP
0.40
3.65
3.65
0.22 0.50
BOTTOM
0.90
±0.10
SIDE
R0.15 3.60
4.90
3.60
4.90
0.30 0.50
0.70
RECOMMENDED PCB-FOOTPRINT
drb_qfn32-5x5-6_pack_1, 10:1
All dimensions given in mm. Tolerances of form and position according to JEDEC MO-220.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 6/41
ABSOLUTE MAXIMUM RATINGS
Beyond these values damage may occur; device operation is not guaranteed.Item Symbol Parameter Conditions UnitNo. Min. Max.G001 V(VDD) Voltage at VDD -6 6 VG002 I(VDD) Current in VDD -20 600 mAG003 Vin Voltage at NERR, X1 . . . X6, NX1
. . . NX6, PTC, ECM, NERRI, FMSEL1,FMSEL2, OEN, Q1...Q6, NQ1...NQ6,VDDS, GNDS
-0.3 VDD+0.3 V
G004 I(GND) Current in GND -600 20 mAG005 I() Current in VDDS, GNDS -70 70 mAG006 I() Current in X1 . . . X6, NX1 . . . NX3, PTC,
ECM, NERRI, FMSEL1, FMSEL2, OEN-4 4 mA
G007 I() Current in Q1 . . . Q6, NQ1 . . . NQ6 -60 60 mAG008 I() Current in NERR 0 30 mAG009 Vd() ESD Susceptibility at All Pins HBM 100 pF discharged through 1.5kΩ 4 kVG010 Tj Junction Temperature -40 150 °CG011 Ts Storage Temperature Range -40 150 °C
THERMAL DATA
Operating Conditions: VDD = 3 . . . 5.5 VItem Symbol Parameter Conditions UnitNo. Min. Typ. Max.
T01 Ta Operating Ambient Temperature Range -40 125 °C
All voltages are referenced to ground unless otherwise stated.All currents flowing into the device pins are positive; all currents flowing out of the device pins are negative.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 7/41
ELECTRICAL CHARACTERISTICS
Operating Conditions: Tj=-40 °C . . . 125 °C, VDD = 3 . . . 5.5 V, unless otherwise statedItem Symbol Parameter Conditions UnitNo. Min. Typ. Max.Total Device001 V(VDD) Permissible Supply Voltage 3 5.5 V002 I(VDD) Supply Current no load, VDD = 5.5 V 1.6 2.5 mA
no load, VDD = 3 V 1 1.8 mA003 I(VDDS) Permissible Load Current VDDS -60 0 mA004 I(GNDS) Permissible Load Current GNDS 0 60 mA005 Toff Overtemperature Shutdown Increasing temperature Tj 135 185 °C006 V(VDD)on Turn-On Threshold Increasing VDD 2.1 2.9 V007 V(VDD)off Turn-off Threshold Decreasing VDD 2.1 2.9 V008 V(VDD)hys Power-on Hysteresis 3 mV009 Vcz()hi Clamp Voltage hi at X1 . . . X3,
NX1 . . . NX3, Q1 . . . Q6, NQ1. . . NQ6, VDDS
7 V
010 Vc()hi Clamp-Voltage hi at ECM, OEN,FMSEL1, FMSEL2, NERRI
Vc()hi = V() - V(VDD), I() = 0.2 mA 0.3 1.5 V
011 Vc()hi Clamp-Voltage hi at Inputs X4. . . X6, PTC
Vc()hi = V() - V(VDD), I() = 1 mA 0.3 1.5 V
012 Vc()lo Clamp Voltage lo at X1 . . . X6,NX1 . . . NX3, PTC, ECM, OEN,FMSEL1, FMSEL2, NERRI,NERR, Q1 . . . Q6, NQ1 . . . NQ6,VDDS
I() = -1 mA -1.5 -0.3 V
Digital Inputs X1 . . . X6, ECM, NERRI, OEN, FMSEL1, FMSEL2101 Vt()hi Input Threshold Voltage hi Channel as output driver 2 V102 Vt()lo Input Threshold Voltage lo Channel as output driver 0.8 V103 Vt()hys Input Hysteresis Channel as output driver 110 280 mV104 Ipd() Input Pull-Down Current Channel as output driver 4 60 220 µA
V() = 0.4 V . . . VDDS105 tdmax() Maximum delay from Sin-
gle-Ended Input to RS422 output30 ns
Digital Outputs X4, X5, X6201 Isc()lo Output Short Circuit lo Channel as RS-422 receiver 8 100 mA
V() = VDDSOEN = 1
202 Isc()hi Output Short Circuit hi Channel as RS-422 receiver -100 -8 mAV() = GNDSOEN = 1
203 Vs()lo Output Saturation Voltage lo Channel as RS-422 receiver 400 mVI() = 3 mAVs()= V() - V(GNDS)OEN = 1
204 Vs()hi Output Saturation Voltage hi Channel as RS-422 receiver 400 mVI() = -3 mAVs()= VDDS - V()OEN = 1
205 tr() Rise Time Channel as RS-422 receiver 20 nsCext = 50 pFOEN = 1
206 tf() Fall Time Channel as RS-422 receiver 20 nsCext = 50 pFOEN = 1
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 8/41
ELECTRICAL CHARACTERISTICS
Operating Conditions: Tj=-40 °C . . . 125 °C, VDD = 3 . . . 5.5 V, unless otherwise statedItem Symbol Parameter Conditions UnitNo. Min. Typ. Max.Analog Inputs/Outputs301 Ron ON Resistance at X1 . . . X6, NX1
. . . NX3Channel in Encoder Link State 110 400 Ω
302 I(max) Maximum Direct Current Channel in Encoder Link State 1 mA303 Ilk() Leakage Current at X1 . . . X6,
NX1 . . . NX3, Q1 . . . Q6, NQ1. . . NQ6
Channel in Encoder Link State -35 0 35 µA
304 f(COMM) Communication Frequency at X1. . . X6, NX1 . . . NX3
Channel in Encoder Link State 10 MHz
NERR Output401 INERR() Current in NERR V(NERR) < 0.5 V, error 4 25 mA402 Vs()lo Saturation Voltage lo I(NERR) = 4mA 0.5 V
RS-422 Inputs Q4/NQ4 . . . Q6/NQ6501 Ri Input Resistance Channel configuration as RS-422 Receiver 1 kΩ
Vi(Qx)= 0 . . . 5.5 VVi(NQx)= 0 VRi = 5.5
∆ IQxOEN = 1
502 Vi(Qx),Vi(NQx)
Input Voltage Channel configuration as RS-422 Receiver 0 VDD VOEN = 1
503 |Vid()| Differential Input Voltage Channel configuration as RS-422 Receiver 0.05 VDD/2 V|Vid()| = |Vip() − Vin()|OEN = 1
504 Vic() Common-Mode Input Voltage Channel configuration as RS-422 Receiver 0.8 VDD VVic() = Vip()−Vin()
2OEN = 1
505 Vid()hys Differential Input VoltageHysteresis
Channel configuration as RS-422 Receiver 0.5 8 mVOEN = 1
506 f(max) Maximum CommunicationFrequency
Channel configuration as RS-422 Receiver 10 MHzOEN = 1R Termination = 120Ω
507 tdmax() Maximum delay from RS422input to Single-Ended Output
40 ns
Line Driver Outputs Q1/NQ1 . . . Q6/NQ6601 Icex Output Leakage Current OEN = 0 -35 0 35 µA602 Vs()hi Saturation Voltage hi Vs() = VDD - V(); I() = -20 mA 800 mV
OEN = 1603 Vs()lo Saturation Voltage lo Vs() = V(); I() = 30 mA 800 mV
OEN = 1
604 Isc()lo Short-Circuit Current lo at outputdriver
V() = V(VDD) 30 65 mAOEN = 1
605 Isc()hi Short-Circuit Current Hi at outputdriver
V() = V(GND) -45 -20 mAOEN = 1
606 f(max) Maximum Output Frequency Load = 120Ω 10 MHz607 tr() Rise Time RL = 120Ω in-between Qx and NQx;
VDD = 5.5 V 15 nsVDD = 3 V 20 ns
608 tf() Fall Time RL = 120Ω in-between Qx and NQx;VDD = 5.5 V 15 nsVDD = 3 V 20 ns
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 9/41
ELECTRICAL CHARACTERISTICS
Operating Conditions: Tj=-40 °C . . . 125 °C, VDD = 3 . . . 5.5 V, unless otherwise statedItem Symbol Parameter Conditions UnitNo. Min. Typ. Max.Reverse Polarity Protection and Supply Switches VDDS, GNDS701 Vs() Saturation Voltage VDD,
Vs(VDDS) = VDD − V(VDDS)I(VDDS) = -20 . . . 0 mA 150 mVI(VDDS) = -60 . . . -20 mA 250 mV
702 Vs() Saturation Voltage GND,Vs(GNDS) = V(GNDS) − GND
I(GNDS) = 0 . . . 20 mA 150 mVI(GNDS) = 20 . . . 60 mA 250 mV
703 Irev(VDD) Reverse-Polarity Current V(VDD) = -5.5V . . . -3 V -1 0 mAEncoder Link Sequence801 Vt()hi Input Voltage Level hi at Q1, NQ1 80 %VDD802 Vt()lo Input Voltage Level lo at Q1, NQ1 20 %VDD803 ts Valid State Duration Time 49 50 52 µs804 ∆ ts Max State Time Variation ts = 50µs -500 200 ns805 Ilk() Leakage Current voltage reversal -1 1 µA
Configuration Output, pin PTC901 Vptc() Configuration Output Voltage Encoder Link State 45 50 55 %VDDS
CPTC = 10 nF optional902 Ilk() Leakage Current no Encoder Link State -10 10 µA
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 10/41
CHANNEL DESCRIPTION
iC-HF is a 6-channel RS-422 line driver.There are two types of channels:
• unidirectional channel• bidirectional channel
Unidirectional channel
Channels 1, 2 and 3 are unidirectional channels. Thesechannels can work under unidirectional RS-422 driverconfiguration or under Encoder Link State.
RS422
BYPBYPNQi
NXi
TRI
QiXi
TRI
Qi
NXi
BYPNQi
Xi
Figure 1: Unidirectional channel
When the channel works as unidirectional RS-422driver, single ended input signals at Xi pins are con-verted into differential output signals at Qi/NQi outputs.Output signals follow RS-422 protocol. Differential out-put drivers are tristate drivers. OEN pin must be sethi to enable differential output signals, otherwise theywill remain in high impedance state. More informationon the internal signal TRI and the output drivers in highimpedance can be found on page 18.
A pull-down resistor is present at the inputs, and in-coming signals at Xi pins must be TTL-compatible. Inunidirectional driver configuration, signals at NXi pinsare disabled. The equivalent circuit can be found infigure 2.
RS422output
NQiNXiTRI
QiXi
NQiNXiTRI
XiQi
Figure 2: Equivalent circuit of unidirectional RS-422driver channel
When the channel is in Encoder Link State, signalspresent at input pins Xi are bypassed and directly con-nected to output pins Qi. Signals at NXi are bypassedtoo to output pins NQi. Unidirectional channels in En-coder Link State present two bypassed lines.
The input stage and the input pull-down resistor andthe output stage are disabled in Encoder Link State.
This configuration is useful for calibrating sensors. Ana-log signals from the sensor can be directly accessedfrom pins Qi/NQi. More information on the EncoderLink State on page 22.
EncoderLink
NQiNXi
QiXiXi Qi
NXi NQi
Figure 3: Equivalent circuit of 1 channel (2 lines) inEncoder Link State
Bidirectional channel
Channels 4, 5 and 6 are bidirectional channels. Thesechannels can work under bidirectional RS-422 driverconfiguration or under Encoder Link state.
RS422I/O
EBIS
BYPNQi
TRI
QiXi
+_
BYP
Qi
NQiTRI
EBIS
Xi
Figure 4: Bidirectional channel
When the channel is a bidirectional RS-422 driver, itcan work as a transmitter or as a receiver. It cannotwork simultaneously in both modes, each working modecorresponds to a specific configuration of the channel.
If the channel is a transmitter, single ended signals atinput pins Xi are converted into differential output sig-nals at Qi/NQi outputs. Outputs signals follow RS-422protocol. A pull-down resistor is present at the inputs,and incoming signals at Xi pins must be TTL compatible.The equivalent circuit can be found in figure 5. Similarlyto unidirectional channels, OEN pin must be set hi toenable differential output signals, otherwise they willremain in high impedance state. More information onoutput drivers in high impedance can be found on page18.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 11/41
RS422Output
NQiTRI
QiXi
NQi
Qi
TRI
Xi
Figure 5: Equivalent circuit of RS-422 transmitter
If the channel is a receiver, differential input signals atpins Qi/NQi are converted into single ended signals atXi outputs. Incoming differential signals should followRS-422 protocol. External resistors may be required toadapt signal voltage levels to iC-HF internal voltages.More information on the RS-422 receiver on page 24.
Output Enable bit OEN must be set hi in order enablethe single ended output driver. With OEN = 0, the driveris left in high impedance.
In RS-422 receiver configuration the pull-down resistoris disabled and the differential output driver is left inhigh impedance.
RS422Input
NQiTRI
QiXi
_+
NQi
Xi
TRI
Qi
Figure 6: Equivalent circuit of RS-422 receiver
If the channel is in Encoder Link State, signals presentat input pins Xi are bypassed and directly connected tooutput pins Qi. Bidirectional channels in Encoder LinkState present one bypassed line. Pull-up resistors andthe output drivers are disabled. No signal is connectedto NQi pins.
EncoderLink
NQi
QiXi
NQi
Xi Qi
Figure 7: Equivalent circuit of one line in EncoderLink State
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 12/41
FUNCTION DESCRIPTION
iC-HF has 4 function modes. Each function mode com-bines the unidirectional and bidirectional channels witha specific configuration. iC-HF can be operated as asix channel line driver, as a 6 lines transceiver withBiSS/SSI connectivity or as a bus capable BiSS slavetransceiver inserted in a BiSS bus structure. The 4function modes are the following:• A/B/Z and U/V/W• A/B/Z and BiSS/SSI• BiSS bus structure• BiSS bus loopbackSelection of iC-HF’s function mode is set by the pinsFMSEL2 and FMSEL1:
FMSEL2 FMSEL1 MODE0 0 A/B/Z and U/V/W0 1 A/B/Z and BiSS/SSI1 1 BiSS bus structure1 0 BiSS bus loopback
Table 4: Mode Configurations
FMSELx pins include pull-down resistors. When thereis no external connection to FMSELx pins, A/B/Z andU/V/W is the default selected mode.
A/B/Z and U/V/W Mode
If FMSEL2 = 0 and FMSEL1 = 0, iC-HF is configuredin A/B/Z and U/V/W mode. A/B/Z and U/V/W modeis the default mode. In this mode all 6 channels workas line drivers. Single ended input signals at pins X1to X6 are converted into differential output signals atpins Q1/NQ1 to Q6/NQ6. Output signals follow RS-422standard.
Output Enable pin ”OEN” must be set hi to enable differ-ential output signals. When working as 6-channel linedriver, pins NX1 to NX3 are disabled. An example ofiC-HF working as a 6-channel line driver is presentedin figure 8.
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
RS422Output
RS422Output
RS422Output
RS422Output
RS422Output
RS422Output
DETECTION
OVERTEMP
REQUESTCONTROL
FMSEL1
FMSEL21
3..5.5V
LOGIC
NERRI
VDDS
GNDS
NERR
BYPR
PoDo
PoDo
ECM
EBIS
GND
VDD
OEN
NQ2
OVT
NQ4
NQ3
NQ1
NQ5
OVT
PTC
NQ1
NQ6
1uF
NX3
NX1
1uF
BYP
NX2
TRI
TRI
Q6
Q2
Q3
Q5
Q1
Q1
Q4
X5
X1
X3
X4
X6
X2
1
Q5
NQ3
GND
NQ2
FMSEL1
X1
VDD
Q4
Q3
Q1
VDDS
NX3
NX2
FMSEL2
NQ1
Q6
NX1
X5
X6 NQ6
NQ4
NQ1TRI
NERRI
ECM
NERR
GNDS
EBIS
PTC
X3
OEN
Q2X2
Q1
X4
NQ5
Figure 8: A/B/Z and U/V/W mode, 6 channel linedriver
In A/B/Z and U/V/W mode it is possible to enter En-coder Link State. If Encoder Link State in this modeis entered, signals at pins X1 to X6 are directly linkedto output pins Q1 to Q6. Input signals at pins NX1 toNX3 are also linked to output pins NQ1 to NQ3. Alto-
gether, 9 lines are available in A/B/Z and U/V/W modein Encoder Link State.
To enter Encoder Link State, ECM pin must be set hiand two signals must be input at pins Q1 and NQ1following a specific timing sequence. This timing se-quence is called Encoder Link Sequence. More infor-mation about entering Encoder Link State on page 22.
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
REQUESTCONTROL
FMSEL1
FMSEL21
3..5.5V
LOGIC
NERRI
VDDS
GNDS
NERR
BYPR
PoDo
PoDo
EBIS
ECM
GND
VDD
OEN
NQ5
NQ1
OVT
NQ6
NQ2
NQ3
NQ1
OVT
NQ4
PTC
NX3
BYP
1uF
NX1
1uF
NX2
TRI
Q4
Q1
Q3
Q6
Q2
Q5
Q1
X2
X3
X1
X4
X6
X5
1
Q6
Q1
NX1
GND
Q4
Q5
NX2
X1
GNDS
FMSEL1
X6
X3
ECM
NX3
NQ1
EBIS
FMSEL2
OEN
NQ2
VDDS
NQ6
PTC
NERRI
Q1
Q2
NQ5
VDD
NQ4
NQ3
NERR
Q3
X4
NQ1
X5
X2
Figure 9: A/B/Z and U/V/W mode, 9 lines in EncoderLink State
A/B/Z and BiSS/SSI modeIf FMSEL2 = 0 and FMSEL1 = 1, iC-HF is configuredin A/B/Z and BiSS/SSI mode. In A/B/Z and BiSS/SSIMode channels 1, 2 and 3 work as line drivers, similarto A/B/Z and U/V/W mode.
Channels 4, 5 and 6 are used for implementingBiSS/SSI communication in RS-422. This allows com-
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 13/41
municating with a sensor using BiSS protocol andRS-422 physical layer, suitable for industrial environ-ments. The sensor’s BiSS lines should be connectedto pins X4, X5 and X6 of iC-HF. The BiSS/SSI mastermust use pin pairs Q4/NQ4, Q5/NQ5 and Q6/NQ6 forBiSS communication.
Channel 4 is configured as an RS-422 output driverand carries SLO signal. SLO from the sensor in singleended form must be connected to input pin X4. Thesignal SLO will be delivered by pins Q4/NQ4 to themaster following the RS-422 standard.
Channels 5 and 6 are configured as RS-422 inputdrivers. Channel 5 carries MA signal and delivers itto the sensor through pin X5 in a single ended signal.Channel 6 does the same with SLI signal.
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
RS422Output
RS422Output
RS422Output
RS422Ouput
DETECTION
OVERTEMP
RS422Input
RS422Input
CONTROL REQUEST
FMSEL2
FMSEL1
1
3..5.5V
LOGIC
NERRI
GNDS
VDDS
NERR
BYPR
PoDo
PoDo
ECM
EBIS
VDD
GND
OEN
NQ1
NQ1
OVT
NQ5
SLO
OVT
NQ2
NQ6
NQ3
SLONQ4
PTC
1uF
NX2
1uF
NX3
NX1
BYP
MAMA
TRI
TRI
TRI
SLITRI
TRI
SLI
Q3
Q1
Q4
Q6
Q2
Q1
Q5
X4
X5
X6
X2
X3
X1
_
1
_
+
+
X1
X5
Q1
NQ1TRI
X2
NQ3NX3
FMSEL1
NQ5
NQ4
ECM
Q2
PTC
NQ2
Q5
VDD
NERR
X6
TRI
X3
GNDS
NQ6
GNDVDDS
EBIS
OEN
FMSEL2
Q1
Q3
Q6
TRI
NQ1
NERRI
NX1
Q4X4
NX2
TRI
Figure 10: A/B/Z and BiSS/SSI mode, 3 channelsline driver
In A/B/Z and BiSS/SSI mode it is possible to enter En-coder Link State. Only channels 1, 2 and 3 can enterEncoder Link state in this mode. Signals at pins X1to X3 are directly linked to output pins Q1 to Q3 andsignals at pins NX1 to NX3 to output pins NQ1 to NQ3.Altogether, 6 lines are available in A/B/Z and BiSS/SSImode under Encoder Link State.
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
RS422output
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
RS422Input
RS422Input
REQUESTCONTROL
FMSEL1
FMSEL21
3..5.5V
LOGIC
NERRI
VDDS
GNDS
NERR
BYPR
PoDo
PoDo
ECM
EBIS
GND
VDD
OEN
NQ1
NQ2
SLO
PTC
NQ5
OVT
SLONQ4
NQ1
OVT
NQ6
NQ3
1uF
NX2
NX1
1uF
BYP
NX3
MAMA
TRI
TRI
TRI
SLISLI
TRI
Q2
Q1
Q6
Q5
Q4
Q3
Q1
X4
X2
X3
X1
X5
X6
_
+_
1
+
OEN
VDD
GNDS
EBIS
NQ2
Q3
Q2
GND
X3
ECM
VDDS
Q4X4
NQ3
Q1
NX2
FMSEL2
X5
NERR
Q6X6
NX1
NQ6TRI
NQ4
NERRI
NQ1
FMSEL1
PTC
NX3
X2
X1
NQ5
Q5
Q1
NQ1
TRI
TRI
Figure 11: A/B/Z and BiSS/SSI mode, 6 lines in En-coder Link State
To enter Encoder Link State, ECM pin must be set hiand two signals must be input at pins Q1 and NQ1following a specific timing sequence. This timing se-quence is called the Encoder Link Sequence. For moreinformation about entering Encoder Link State on page22.
BiSS bus structureIf FMSEL2 = 1 and FMSEL1 = 1, iC-HF is configured inBiSS bus structure mode. This mode allows to com-municate with a sensor BiSS and including the sensorin a BiSS bus structure/topology. Signals will followRS-422 protocol, making it suitable for industrial envi-ronments. For using this mode it is necessary that thesensor connected to iC-HF has an BiSS bus compatibleinterface.
In BiSS bus structure mode each differential channelcarries a specific line from BiSS bus:
Channel Number Input/Output BiSS Signal1 output MA output2 output SLO3 output SL output4 input MA input5 input SLI6 input SL input
Table 5: Differential channel function in BiSS bus struc-ture mode
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 14/41
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
RS422Output
RS422output
RS422output
DETECTION
OVERTEMP
RS422Input
RS422Input
RS422Input
REQUESTCONTROL
FMSEL1
FMSEL21
3..5.5V
LOGIC
NERRI
GNDS
VDDS
NERR
BYPR
PoDo
PoDo
EBIS
ECM
GND
VDD
OEN
MAo
MAo
PTC
SLO
OVT
NQ2
NQ4
SLO
NQ1
NQ1
OVT
NQ3
NQ6
NQ5
NX2
BYP
1uF
NX3
NX1
1uF
SLoSLo
MAiMAi
SLiSLi
TRI
TRI
TRI
SLISLI
TRI
TRI
Q2
Q4
Q3
Q5
Q1
Q1
Q6
X1
X3
X2
X5
X4
X6
_
_
+
+
1
+_
GNDS
TRI
X1
OEN
Q1
NQ5
Q5
X6
NERRI
NX3NQ3
Q6
X2
VDD
FMSEL2
PTC
TRI
Q3
NX1
VDDS
NX2
NQ6
Q2
EBIS
X5
TRI
Q4
X3
X4
TRI
NQ1
Q1
GND
NQ4
NQ1
FMSEL1
ECM
NQ2
NERR
Figure 12: BiSS bus structure mode
In BiSS bus structure mode it is possible to enter En-coder Link State. Only channels 1, 2 and 3 can enterEncoder Link state in this mode. Signals at pins X1to X3 are directly linked to output pins Q1 to Q3 andsignals at pins NX1 to NX3 to output pins NQ1 to NQ3.Altogether, 6 lines are available in BiSS bus structuremode under Encoder Link State, as it is shown in Figure13.
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
RS422Input
RS422Input
RS422Input
CONTROL REQUEST
FMSEL2
FMSEL1
1
3..5.5V
LOGIC
NERRI
VDDS
GNDS
NERR
BYPR
PoDo
PoDo
ECM
EBIS
GND
VDD
OEN
NQ2
NQ6
PTC
NQ5
NQ1
NQ4
OVT
NQ1
NQ3
OVT
NX3
NX2
1uF1uF
NX1
BYP
MAiMAi
SLiSLi
SLI
TRI
TRISLI
TRI
TRI
Q2
Q5
Q1
Q6
Q1
Q3
Q4
X1
X5
X6
X2
X4
X3
+
_
+
_
_
1
+
TRINQ6
X2
X3
ECM
TRI
X6
NERR
Q6
NX2
NX1
Q5
Q4
X1
NQ1
Q3
X5
GNDS
NQ4
VDD
FMSEL2
VDDS
FMSEL1
PTC
NQ1
OEN
Q2
GND
EBIS
NQ3
Q1
NQ5
NQ2
X4
NX3
NERRI
TRI
Q1
Figure 13: Encoder Link State in BiSS bus structuremode
Figure 14 shows an example of connecting several sen-sor nodes in a BiSS bus structure using iC-HF. Thelocation of the channels has been modified in the pic-ture to have a clearer view of the data flow in the bus.
In the example, the slave nodes do not have SLo andSLi pins. Therefore, pins X3 and X6 should be exter-nally connected to allow proper data flow.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 15/41
iC-HF iC-HFiC-HF
BiSSSLAVENODEBiSSSLAVENODE BiSSSLAVENODE
FMSEL2 FMSEL2 FMSEL2
FMSEL1FMSEL1 FMSEL1
VDDS VDDS VDDS
MAO
MAO
MAO
X1
X3
X2
X1
X6
X6
X4
X2
X3
X4
X3
X6
X5
X4
X5
X1
X5
X2
MAo MAo
MAoMAo MAo
MAo
SLO
NQ2
SLO
NQ4
NQ6
NQ4
SLO
SLO
SLO
NQ5
SLO
NQ3
SLO
NQ3 NQ6
NQ2
NQ6
NQ5
NQ1
NQ3
NQ2
SLO
NQ1
NQ5
SLO
NQ4
SLo
SLo SLoSLo
SLoSLo
MAi MAiMAi
MAi MAiMAi
MAI
MAI
MAI
SLiSLi
SLi
SLi
SLi SLi
SLI
SLI
SLI
SLI
SLI
SLI
SLI
SLI
SLI
Q6
Q2
Q1Q1
Q3
Q1
Q6
Q2
Q4Q4Q4
Q5 Q2
Q3 Q3
Q5Q5
Q6
X4
X1
X6
X6
X1
X4
X6
X3
X2
X5
X3
X4
X5
X1
X3
X2
X4
X5
X2
+ +
_
__+
+
+
+_
_
+
_
_
+
_
_
+
Q5
X6
NQ4
NQ2
X1 Q1
NQ3
Q6
NQ5
VDDS
Q3
SLI
NQ6
SLI
Q3
SLO
NQ1
X1
X5
FMSEL2
X2
Q3
X4
X3
X6
X5
NQ2
X4Q4
NQ5
FMSEL1
NQ2
NQ4
FMSEL1
NQ3
NQ4
MAO
X3
X5
SLO
X4
MAI
Q2
MAI
NQ5
X2
NQ1
Q1
Q5Q2
X3
X6
FMSEL1
Q6
X4
MAI
FMSEL2
VDDS
X1
X2
NQ6
Q4
VDDS
Q5
SLI
Q6
MAO
Q2
Q1
NQ6
MAO
FMSEL2
Q4
SLO
NQ3
Figure 14: Several slave nodes in BiSS bus structureBiSS bus loopback
If FMSEL2 = 1 and FMSEL1 = 0, iC-HF is configuredin BiSS bus loopback mode. This mode is a particularcase of BiSS bus structure mode, where iC-HF is op-erated as the termination node/loopback of the BiSSbus.
BiSS bus loopback allows addressing the case wherethe BiSS Bus is damaged. If the bus is somehow dam-aged, e.g. a broken wire, data will be interrupted andno communication will be possible. The last node pre-vious to the point of damage can be configured as atermination node of the BiSS bus by setting FMSEL = 0,avoiding the need of re-wiring last node’s output chan-nels. Therefore communication between nodes beforethe damage point will still be possible. iC-HF doesnot detect a BiSS bus structure damage nor activateautomatically the BiSS bus loopback.
When the iC-HF is configured as a termination nodeof the BiSS bus, some channels configurations arechanged with respect to BiSS bus loopback mode.Channel 1 is disabled and pins Q1/NQ1 will be in highimpedance. The clock input signal MA entering chan-
nel 4 is no longer transmitted along the bus throughchannel 1.
Output signals from channel 2 will also be disabled,setting Q2/NQ2 to high impedance. Input signals atX2 will be internally connected to channel 3 and outputthrough pins Q3/NQ3. The data input signal SLI en-tering channel 5 is no longer transmitted through SLOat channel 2. The data input signal SLI is transmittedthrough signals SLo at channel 3.
Input signals at X3 are disabled. The data return inputsignals SLi at channel 6 will no longer be transmittedthrough channel 3.
Table 6 summarizes each differential channel’s functionin this mode.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 16/41
Channel Number Input/Output BiSS Signal1 disabled -2 disabled -3 output SL output4 input MA input5 input SLI6 input -
Table 6: Differential channel function in BiSS bus loop-back mode
In BiSS bus loopback mode it is possible to enter En-coder Link State. Only channels 1, 2 and 3 can enterEncoder Link state in this mode. Signals at pins X1to X3 are directly linked to output pins Q1 to Q3 andsignals at pins NX1 to NX3 to output pins NQ1 to NQ3.Altogether, 6 lines are available in BiSS bus loopbackmode under Encoder Link State, as it is shown in Figure16.
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
RS422Output
RS422output
DETECTION
OVERTEMP
RS422Input
RS422Input
RS422Input
CONTROL REQUEST
FMSEL2
FMSEL1
1
HIGHZ
HIGHZ
HIGHZ
HIGHZ
3..5.5V
LOGIC
NERRI
VDDS
GNDS
NERR
BYPR
PoDo
PoDo
EBIS
ECM
VDD
GND
OEN
SLO
NQ1
NQ6
PTC
NQ1
NQ2
OVT
NQ4
NQ5
OVT
NQ3NX3
NX2
NX1
1uF1uF
BYP
SLo
MAiMAi
TRI
SLISLI
TRI
TRI
TRI
TRI
TRI
Q1
Q5
Q1
Q6
Q2
Q4
Q3
X4
X6
X2
X3
X5
X1
+
1
_
_
+
+
_
NQ3
FMSEL1
X4
Q5
NX2
NQ1
NX3
EBIS
GND
TRI
TRI
X1
NX1
NERRI
Q3
Q2
TRI
NQ5
Q1
NQ6
FMSEL2
X5
TRINQ1
X3
NQ4
NERR
Q6
Q1
GNDS
OEN
TRI
ECM
NQ2
PTC
Q4
X2
VDD
X6
VDDS
Figure 15: BiSS bus loopback mode
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
POWERDOWN
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
RS422Input
RS422Input
RS422Input
CONTROL REQUEST
FMSEL1
FMSEL21
3..5.5V
LOGIC
NERRI
GNDS
VDDS
NERR
BYPR
PoDo
PoDo
EBIS
ECM
VDD
GND
OEN
PTC
NQ3
NQ4
NQ1
NQ1
NQ6
NQ2
OVT
OVT
NQ5
NX1
1uF
BYP
1uF
NX2
NX3
MAiMAi
SLiSLi
TRI
TRI
SLI
TRI
SLI
TRI
Q1
Q6
Q5
Q1
Q3
Q2
Q4
X6
X5
X1
X4
X2
X3
+
1
_
+
+_
_
FMSEL2
Q5
TRI
X3
X5
Q6
NX1
NERRI
VDDS
Q1
PTC
NQ3
Q1
X2
OEN
NQ1
NX3
NQ2
X1
EBIS
X4
FMSEL1
Q3
TRINQ4
TRI
Q4
NERR
GND
NQ6
VDD
Q2
NQ5
GNDS
ECM
X6
NX2
NQ1
Figure 16: Encoder Link State in BiSS bus loopbackmode
Figure 17 shows an example of several sensor nodesin BiSS bus using each iC-HF for a bus capabletransceiver. The location of the channels has beenmodified in the picture to have a clearer view of thedata flow in the bus.
The example shows the case of a broken cable. Thenode in the middle is configured as the bus terminator.Data flow occurs from left to right. When reaching themiddle node, it goes back in the left direction.
The slave nodes typically do not have SLo and SLipins. Therefore, pins X3 and X6 should be externallyconnected in order to allow proper data flow.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 17/41
BUSTERMINATION
iC-HFiC-HFiC-HF
DAMAGED
BiSSSLAVENODEBiSSSLAVENODE BiSSSLAVENODE
CABLE
FMSEL2FMSEL2
FMSEL1 FMSEL1FMSEL1
FMSEL2
VDDSVDDS VDDS
MAO
MAO
MAO
X2
X4
X2
X1
X6
X3
X1
X4
X3
X4
X6
X5
X1
X5
X5
X6
X3
X2
MAo
MAo
MAo
MAo
MAo
NQ6
NQ1
NQ3
SLO
NQ5
NQ4
NQ3
SLO
NQ2
SLO
NQ1
NQ6
SLO
SLO
NQ6
SLO
NQ5
NQ4
NQ2
NQ1
NQ3
SLO
NQ2
SLO
NQ4
NQ5
SLo
SLo
SLo
SLo SLo
SLo
MAi
MAi
MAi
MAi
MAi
MAi
MAI
MAI
MAI
SLi
SLi SLi
SLi
SLi
SLI
SLI
SLI
SLI
SLI
SLI
SLI
SLI SLI
Q3 Q6 Q3Q6
Q1Q4
Q2 Q5
Q3
Q2
Q4Q1 Q4 Q1
Q2Q5
Q6
Q5
X4
X2
X5
X2
X5
X3
X4
X1
X5
X3
X3
X1
X1
X6
X4
X2
X6
X6
_
_
_
+ +
+
++
_
_
+
_ _
+
+
_
+_
NQ1
X4
NQ3
X1
Q5
MAI
X5
FMSEL2
X2
X1Q4
VDDS
FMSEL1
Q6
SLO
NQ3
X3
Q3
NQ6
MAI
NQ4
FMSEL1
X3
NQ3
Q4
Q2
MAO
X3
X6
Q6
X1
MAO
X5
NQ2
SLO
Q1 Q4 X4
Q3
VDDS
Q1
X2
Q5
FMSEL2
MAO
Q5
NQ5
SLI
X5
FMSEL1
X4Q1
NQ4
NQ5
NQ4
FMSEL2
Q6
NQ6VDDS
NQ5
Q2
NQ1
NQ2
NQ1
SLO
X2
NQ2
Q3
Q2
SLI
SLI
X6
NQ6
MAI
X6
Figure 17: BiSS bus with node in BiSS bus loopback
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 18/41
INTERNAL PROTECTION AND ERROR SIGNALING
iC-HF is protected against internal overtemperature.When internal temperature is higher than a safety value(cf. Electrical Characteristics no. 005), an overtemper-ature event (OVT) is triggered and all output stagesare set to high impedance though internal signal ”TRI”.Output stages are also left in high impedance if a pow-er-down (PoDo) event is detected.
When the channel outputs are in high impedance, thisis signaled through output pin NERR. NERR is anopen-drain output and it goes lo when an overtempera-ture or power-down event is triggered, when OEN is lo,or when NERRI input is set lo.
The logic state of signal at input pin NERRI is directlypassed to NERR output. This allows transferring an
error signal from the sensor through iC-HF. If not used,NERRI should always be set hi.
Figure 18 shows an example of using NERRI pinfor combining the external NERRI input signal fromiC-MH16 with the iC-HF internal OVT and PoDo errorsignals to NERR output. In this example, iC-HF is inA/B/Z and U/V/W mode, operating as a set of 6 linedrivers.
The open drain NERR output is protected against ex-ternal short circuit. An error LED can be driven directlyand used for visual warning or the NERR signal can beconnected to a microcontroller interrupt pin.
iC-MH16 iC-HF
REVERSEPOLARITYPROTECTION
ERRORMONITOR
INCRINTERFACE
ENCODERLINK
POWERDOWN
RS422output
RS422output
RS422output
RS422output
RS422output
DETECTION
INTERFACE
OVERTEMP
CONTROL REQUEST
NERRFMSEL2
FMSEL1
4.5..5.5V
SERIAL
1
RS422
LOGIC
NERRI
GNDS
VDDS
NERR
NERR
BYPR10kΩ
PoDo
PoDo
EBIS
ECM
VDD
GND
VNDOEN
VPD
VPA
VNA
SLO
NQ4
PTC
OVT
NQ2
NQ1
NQ5
OVT
NQ3
NQ6
NQ1
BYP
1uF 1uF
NX2
NX3
NX1
MA
W
TRI
TRI
SLI
Q3
Q1
Q5
Q4
Q6
Q2
Q1X1
X5
X6
X4
X3
X2
A
V
U
B
Z
W
mto C
V
U
A
B
1
Z
SLO
VNA
Q6X6
Q4
X5Q5
VDD
NX1
NQ6
Q1
VDDS
Q1
NERR
MA
OEN
EBIS
Q3
NQ1
U
FMSEL2
V
TRIZX1
VPA
NERR
W
NQ3
SLI
GND
X3
X4
ECM
NQ1
NX2 NQ2
PTC
NERRI
A
GNDS
VPD
FMSEL1
X2
NX3
NQ5
NQ4
Q2
B
VND
Figure 18: NERR signaling example in A/B/Z and U/V/W mode
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 19/41
REVERSE POLARITY PROTECTION
iC-HF is protected against applying reverse supply volt-age at pins VDD and GND. Connecting a power supplywith reverse polarity to an unprotected chip would per-manently damage it.
iC-HF has a reverse polarity detection block. When areverse polarity connection is detected, iC-HF providesthe following protection actions:
• Power supply for internal blocks is disabled
• The RS422 output drivers are supplied by VDD.
• The RS422 output drivers are high impedancewhen VDD not ok.
• This high impedance when VDD is not includeslines Q1 to Q6, NQ1 to NQ6 and NERR line.
iC-HF also provides extended reverse polarity protec-tion through output power supply lines VDDS (VDDswitched) and GNDS (GND switched). These pins areconnected to VDD and GND through a protecting switch.When a reverse polarity is detected at VDD/GND,VDDS and GNDS are internally disconnected. If asensor is supplied by iC-HF through VDDS/GNDS lines,the polarity protection on iC-HF will be extended to thesensor.
VDDS can supply a maximum of 60 mA (cf. ElectricalCharacteristics no. 003). The current consumptionof the sensor connected to the protected supply pinsshould not exceed this value.
Figure 19 shows connection of a sensor through ex-tended reverse polarity protection.
SENSOR
iC-HF
REVERSEPOLARITYPROTECTION
ERRORMONITOR
ENCODERLINK
POWERDOWN
DETECTION
OVERTEMP
CONTROL REQUEST
FMSEL1
FMSEL2
0...-5.5V
1
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
RS422
LOGIC
NERRI
VDDS
GNDS
NERRNERR
BYPR
10kΩPoDo
PoDo
ECM
EBIS
GNDGND
VDD VDD
OEN
OVT
PTC
NQ2
NQ1
NQ6
NQ4
NQ5
OVT
NQ1
NQ3NX3
1uF
NX2
NX1
1uF
BYP TRI
TRI
Q6
Q1
Q1
Q3
Q5
Q4
Q2
X1
X4
X2
X3
X5
X6W
V
B
A
U
Z
1
OEN
NQ1
A
Q5
Q6
VDD
ECM
Q4
X3
NERR
GND GND
U
NQ1
GNDS
V
Q3Z
Q1
NQ2X2
VDDS
NX3
FMSEL1
PTC
Q1
VDD
NQ6
X4
FMSEL2
X1
X6
Q2
TRI
NERRI
EBIS
NQ3
NQ5
NX2
NX1
NERR
NQ4
B
X5
W
Figure 19: Extended reverse polarity protectionIt is possible to connect to iC-HF a sensor that demandsmore than the maximum permissible load current (cf.Electrical Characteristics no. 003). However, connec-tion of the sensor to iC-HF pins VDDS and GNDSshould be avoided. A load exceeding this maximumvalue will prevent iC-HF to comply with electrical char-acteristic no. 701 and no. 702. Instead, the sensor
should be supplied directly through pins VDD and GND.Figure 20 shows an example.
If configuration in Figure 20 is implemented, it must benoticed that iC-HF will still be protected against reversepolarity but this will not be the case of the sensor.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 20/41
SENSOR
iC-HF
REVERSEPOLARITYPROTECTION
ERRORMONITOR
ENCODERLINK
POWERDOWN
DETECTION
OVERTEMP
CONTROL REQUEST
NERRFMSEL1
FMSEL2
3...5.5V
1
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
RS422
LOGIC
NERRI
GNDS
VDDS
NERRNERR
BYPR
10kΩPoDo
PoDo
EBIS
ECM
GND
VDD
GND
VDD
OEN
OVT
NQ4
NQ2
NQ1
NQ1
NQ5
NQ6
OVT
PTC
NQ3NX3
NX1
1uF
NX2
1uF
BYP
WTRI
TRI
Q5
Q1
Q2
Q6
Q3
Q1
Q4X4
X1
X6
X3
X2
X5 V
A
B
U
Z
W
mto C
V
U
A
B
1
Z
NERR
X2
Q4
Z
VDDS
NERRI
GND
X4
X1A
VDD
Q5
Q3NX2
GND
NX3
VDD
FMSEL2
Q6
NQ5
EBIS
ECM
X3
X5
NQ4
FMSEL1
Q1
NQ1
U
NQ1
V
OEN
W
Q2
NQ3
Q1
GNDS
X6
PTC
TRI
NQ6
NERR
B
NQ2
NX1
Figure 20: Example connection for a sensor with exceeding the maximum permissible load currentFigure 21 shows an alternative example. In this case,VDD and GND lines are short-circuited with VDDS andGNDS lines. This configuration option is permitted,
but it is however not recommended. Connecting VDDand GND to VDDS and GNDS prevents having reversepolarity protection in iC-HF.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 21/41
SENSOR
iC-HF
REVERSEPOLARITYPROTECTION
ERRORMONITOR
ENCODERLINK
POWERDOWN
DETECTION
OVERTEMP
CONTROL REQUEST
NERRFMSEL1
FMSEL2
3...5.5V
1
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
HIGHZ
RS422
LOGIC
NERRI
VDDS
GNDS
NERRNERR
BYPR
10kΩPoDo
PoDo
EBIS
ECM
VDDVDD
GNDGND
OEN
NQ6
NQ1
PTC
OVT
NQ5
NQ1
NQ2
NQ3
NQ4
OVT
NX2
1uF
1uF
NX3
NX1
BYP
W
TRI
TRI
Q4
Q3
Q1
Q6
Q1
Q5
Q2
X3
X1
X4
X2
X6
X5
A
V
U
B
W
Z
mto C
B
A
V
U
1
Z
NERR
Q5
B
VDD
NX3
Q2
NERRI
NQ6
OEN
GND
NQ2
U NQ4
NERR
ECM
NQ3
X2
NX1
V
NX2
VDDS
X1
X6
FMSEL2
Z
NQ1
EBIS
NQ5
FMSEL1
NQ1
X4
W
PTC
Q1A
TRI
Q3
Q4
Q1
GND
VDD
X3
X5
Q6
GNDS
Figure 21: Alternative example connection for a sensor with exceeding the maximum permissible loadcurrent
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 22/41
ENCODER LINK SEQUENCE
All modes A/B/Z and U/V/W, and A/B/Z and BiSS/SSI,and BiSS bus structure, and BiSS loop back modessupport Encoder Link State. FMSEL1 may have anystate and is uncritical for reaching the Encoder LinkState. In this state some input signals at pins Xi andNXi are linked directly to outputs Qi and NQi. The pinsthat are linked in the Encoder Link State depend on thefunction mode. In A/B/Z U/V/W 9 lines are available,while in the remaining modes there are 6 lines avail-able. This feature allows having direct access to analogsignals of the sensor from pins Qi/NQi for calibrationpurposes.
To enter Encoder Link State, ECM pin must be set hiand two signals must be input at pins Q1 and NQ1following a specific timing sequence. This timing se-quence is called the Encoder Link Sequence. No ad-ditional pin is needed in to enter Encoder Link State.ECM can be used to inhibit entering the Encoder LinkState. If ECM is lo, the Encoder Link Sequence willnever be acknowledged.
An example of this sequence is presented in figure 22.The sequence is divided into three time intervals orsteps: t1, t2 and t3:
• In the first step both pins Q1 and NQ1 must bedriven hi during a specific amount of time. Thistime is stored by a Finite State Machine and mustfulfill the requirements specified by parameter ts,which is typically 50µs (cf. Electrical Characteris-tics no. 803). Therefore, the following conditionmust be satisfied:ts(min) < t1 < ts(max)
• In the second step, both pins Q1/NQ1 must bereleased. They will go back to complementarystate (in BiSS bus loopback mode Q1 must bepulled hi and NQ1 lo externally). In the exampleof figure 22, input X1 is high and therefore Q1goes high and NQ1 low when released. Q1/NQ1must be kept in complementary state during anamount of time as close as possible to t1. Themaximum allowed time tolerance is specified byparameter ∆ts, (cf. Electrical Characteristics no.804).(t1 -∆ts) < t2 < (t1 +∆ts)
• In the final step both pins Q1 and NQ1 must bedriven lo during an amount of time as close aspossible to t1. The following condition must befulfilled:(t1 -∆ts) < t3 < (t1 +∆ts)
• After t3 is elapsed, pins Q1/NQ1 must be re-leased.
• Once released, iC-HF will enter Encoder LinkState.
If any of the steps explained above is not fulfilled, theEncoder Link Sequence will be interrupted. A new at-tempt to enter Encoder Link State will have to start fromthe beginning of the Encoder Link Sequence.
There are 2 possibilities to exit Encoder Link State.Driving ECM pin lo will exit the configuration. Normally,ECM will be connected to VDDS. A power-down eventalso exits Encoder Link State, without the need of anextra pin.
EncoderLink
Q1
NQ1
ECM
PTC
t1 t2 t3
Figure 22: Time diagram of the Encoder Link Sequence
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 23/41
iC-PTxxyy/ iC-PT-Hxxyy mode control
iC-HF is a general purpose 6-channel line driver. iC-HFis suitable to be operated with iC-PTxxyy and iC-P-T-Hxxyy opto encoder.
If iC-PTxxyy input pin SEL is lo, A/B mode is selectedand iC-PTxxyy delivers complementary digital A/B/Zsignals. If iC-PTxxyy input pin SEL is hi, iC-PTxxyy is inA/B mode with two fold interpolation. When iC-HF en-ters Encoder Link State output pin PTC provides VDD/2to iC-PTxxyy and therefore iC-PTxxyy is forced to enteranalog mode. In this analog mode, analog signals fromthe photosensors are directly output.
In order to improve the noise rejection and stability atpin PTC, an external 10nF capacitor CPTC can be addedbetween PTC and GNDS pins.
External pull-up and pull-down resistors at SEL pin canbe used in order to select the iC-PTxxyy working mode.iC-HF output PTC pin is used to control the iC-PTxxyyto output analog signals. When Encoder Link mode isentered, PTC delivers VDD/2 voltage. If connected toSEL pin from iC-PTxxyy, this will enter analog modeand signals from the photosensors will be present atoutput pins Qi/NQi from iC-HF.
Figure 23 shows how to connect iC-PTxxyy and iC-HFin order to force Analog Mode in iC-PTxxyy when iC-HFenters Encoder Link. The recommended resistor valuesare given in table 7. See page 26 for more informationon driving an iC-PTxxyy with iC-HF.
iC-PTxxyyHiC-PTxxyy iC-HF
GNDS
VDDS
GND
VCC
PTCSELR1
R2GND
VCC VDDS
PTC
GNDS
SEL
Figure 23: iC-PTxxyy and iC-HF connection for Ana-log Mode selection.
SEL R11) R21) Operation Mode100 % VCC 10 kΩ open ABZ x2 interpolated
50 % VCC open open all analog0 % VCC open 10 kΩ x1 interpolated
1) Exemplary values.
Table 7: Selection of iC-PTxxyy operation mode by pinSEL.
iC-PT-Hxxyy opto encoder include 3 additional workingmodes. Table 8 gives the recommended resistor valuesfor fixing any working mode and allowing All Analogmode when iC-HF enters Encoder Link.
SEL R11) R21) Operation Mode100 % VCC 2.7 kΩ open x2 interpolated
75 % VCC 12 kΩ 48 kΩ analog ABZ, dig. UVW50 % VCC open open all analog25 % VCC 48 kΩ 12 kΩ x4 interpolated
0 % VCC open 2.7 kΩ x1 interpolated1) Exemplary values.
Table 8: Selection of iC-PT-Hxxyy operation mode bypin SEL.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 24/41
RS-422 RECEIVER CONFIGURATION
In A/B/Z and BiSS/SSI mode, BiSS bus structure mode,and BiSS bus loopback mode some channels are con-figured as RS-422 receivers. Table 9 presents thefunction modes together with the channels that are con-figured as RS-422 receivers.
Function mode RS-422 receiving channelsA/B/Z and BiSS/ISS channel 5 and 6BiSS bus structure channel 4, 5 and 6BiSS bus loopback channel 4, 5 and 6
Table 9: RS-422 receiving channels
Some parameters are important in characterizing thereceiver: the input voltage (VQi and VNQi), the differen-tial voltage (Vid), and the common mode voltage (Vic),where:
Vid = VQi − VNQi
Vic = VQi+VNQi2
Figure 24 shows these voltages.
-+
RS422Input
VNQi
GND
VQi
NQi
+Vid
Vic
-
Qi
XiVid
+ VQiXi
Qi
GND
NQi-Vic
VNQi
Figure 24: RS-422 input sensitivity
Possible voltage ranges of RS-422To comply with the possible voltage ranges of RS-422standard, the RS-422 receiver must fulfill the followingrequirements:
• Over an entire common mode voltage ranging from-7 V to 7 V the receiver should not require a differen-tial input voltage of more than |200 mV| to correctlyassume the intended binary state.
• The receiver has to maintain correct operation for dif-ferential input voltages ranging from 200 mV to 10 Vin magnitude.
• The maximum input voltage (VQi, VNQi) shall notexceed 10 V in magnitude.
• The receiver must be able to operate with a maximumdifferential of 12 V without being damaged.
Figure 25 illustrates the minimum and maximum oper-ating voltages of the receiver.
-10V
TransitionRegion
Vid
Vid
MaximumOperatingRange
+10V
-200mV
+200mV
Figure 25: RS-422 input maximum and minimum op-erating voltages
It is not allowed in iC-HF to apply negative input sig-nals or signals higher than supply voltage. Followingthese requirements, table 10 shows the sensitivity, theminimum and the maximum values at the receiver.
Parameter Minimum MaximumVi(Qx) 0 V 5.5 V
Vi(NQx) 0 V 5.5 V|Vid| 50 mV 5.5 VVic 800 mV 5.5 V
Table 10: RS-422 sensitivity and input voltages
To comply with the total voltage ranges of RS-422 ex-ternal resistors can be placed in line of the input pinseach receiver. The resistor value is 16.9 kΩ with a tol-erance of 1%. The relative tolerance of both resistors(matching) requires a tolerance of 0.1%.An elegant solution is an integrated resistor networkwith a matching better 0.1% e.g. :
• Vishay ACAS 0606 for a point-to-point BiSS interface(MA+/- input) with two resistors each 4 pin package.
• Vishay ACAS 0612 for a BiSS bus structure interface(MA+/-, SLI+/- inputs) with four resistors each 8 pinpackage.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 25/41
It is recommended to locate such optional resistorsclosely and symmetrically to the related RS-422 inputpins. If these resistors are used, the sensitivity, the min-imum, and the maximum input voltages at the receiverare shown in table 11. With these resistors in use ameasurement between iC-HF and the resistors can besensitive due to possible additional capacitive load ofprobe(s).
Figure 26: External resistors layout location examplefor RS-422 receiver
Parameter Minimum MaximumVi(RTQx) -10 V 10 V
Vi(RTNQx) -10 V 10 V|Vid| 200 mV 12 VVic -7 V 7 V
Table 11: RS-422 sensitivity and input voltages with ex-ternal resistors
In addition to the external resistors, the bus terminationresistor of 120Ω should be placed between both inputsof the receiver. Figure 27 shows this configuration.
+-
RS422Input
Vi(RTNQx)
Vi(RTQx)
16k9
16k9
NQI 120+-
QI
XI Rt
-+XI
NQI
QI
Figure 27: RS-422 receiver with external resistors
iC-HF allows RS-422 communication up to 10 MHz. Athigh frequencies the performance can be improved byusing 1 pF capacitors parallel with each external resistor(excluding the bus termination resistor). Some designsdo provide such similar capacity already by layout.
Note:Operating iC-HF sole at full RS422 operational voltagelevels will cause permanent damage to the device.The iC-HF is designed to handle 5V RS422 signalson the serial BiSS/SSI interface.For full 12 V / -7 / ±10 V RS422 operation the RS422receiver input resistor networks as described are rec-ommended.In order to utilize the full RS422 operational voltagerange possible protective diodes and TVS diodesneed to be RS422 compatible types.
Unused/open RS-422 input pinsTo avoid oscillations on open or unused pins a stablestate is recommended. Unused or open RS-422 inputpins can be to be connected to a stable voltage. Thevoltage of the positive and negative input pin needsto be bigger than the input hysteresis. In the caseof unused input pins the Qi and NQi pins should beconnected to field sided, different, stable input voltageslike VDD and GND.
Example for stable input voltages on unused/openpins:• Qi = VDD• NQi = GND
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 26/41
APPLICATION EXAMPLES
All figures indicate only the basic operation with iC-HFand do not contain all details, connections, configura-tions and options for a working system.
iC-HF can drive a wide range of applications and combi-nations of sensors and interpolators and their possiblesignals and interfaces. In this chapter, a group of exam-ples on interconnecting different devices with iC-HF ispresented.
• The blocking capacitor at VDD - GND will helpto reduce the spikes due to the RS422 driversswitching.
• A better blocking against spikes at the iC can beimproved by placing the capacitor closer to theiC-HF.
Function Mode iC-PTxxyy iC-MU iC-MH16 iC-NQiC-PT-Hxxyy iC-MHM
A/B/Z and U/V/W X X XA/B/Z and BiSS/SSI X X X
Table 12: Applications and modes
iC-PTxxyy/ iC-PT-Hxxyy
Figure 28 shows an example of using iC-HF fordriving iC-PTxxyy/ iC-PT-Hxxyy, which are threecomplementary channel photodiode arrays. iC-P-Txxyy/iC-PT-Hxxyy are supplied through the reversepolarity protected supply pins, VDDS and GNDS.
FMSEL1 and FMSEL2 are set to lo, therefore iC-HFis in A/B/Z and U/V/W mode, a 6 channel RS-422 linedriver.
A pull-down resistor (10 kΩ for iC-PTxxyy, 2.7 kΩ foriC-PT-Hxxyy) at SEL pin forces iC-PTxxyy/ iC-PT-Hxxyyto work in A/B operation x1 interpolated. Outputs PA,PB, and PZ are connected to pins X1 to X3. There-
fore, A, B, and Z signals are transmitted under RS-422protocol through channels 1 to 3. Signals U, V, and Ware connected to inputs X4 . . . X6 and outputs throughchannels 4 to 6. Set the OEN pin hi for channel en-abling.
iC-HF enters Encoder Link State when ECM pin is set tohi. Pins NA, NB, and NZ from iC-PTxxyy/ iC-PT-Hxxyyare connected to NX1, NX2, and NX3 respectively. PTCfrom iC-HF is connected to SEL from iC-PTxxyy/ iC-P-T-Hxxyy. After a successful Encoder Link Sequence,SEL/PTC node will be driven at VDDS/2. iC-PTxxyy/Hwill enter analog mode and all signals will be directlylinked to output pins Qi/NQi.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 27/41
iC-PTxxyyH
iC-PTxxyy -+
iC-HF
REVERSEPOLARITYPROTECTION
ENCODERLINK
COMPARATION
COMMUTATION
POWERDOWN
QUADRATURE
DETECTION
OVERTEMP
CONTROL
CONTROL
REQUEST
RS422I/O
RS422I/O
NERR
OUTPUT
FMSEL2
3.5..5.5V
FMSEL1
OUTPUT
POWER
SIGNAL
1
RS422
RS422
RS422
RS422
LOGIC
INDEX
NERRI
GNDS
VDDS
NERR
BYPR
PoDo
PoDo
ECM
EBIS
VDDVCC
GND
GND
AND
OEN
OVT
NQ2
NQ3
NQ1
LED
NQ1
NQ4
OVT
PTC
LED
NQ5
NQ6
SEL
1uF
BYP
NX2
1uF
NX1
NX3
BYP
BYP
+W
TIP
TRI
TRI
TIN
NB
NA
PA
PB
-
Q4
Q2
Q6
Q5
Q1
Q1
Q3
X4
NZ
X1
X2
X3
X6
X5
PZ
A
V
B
U
Z
W
V
U
1
Q1
PB
ECM
U
NQ1
-
GND
NQ5
SEL
Q2
NQ6
PZ
TRI
Q6
EBIS
NX2Q3
PTC
TIP
NA
X4
TIN
V
PA
VDDS
NZ
X6
VDD
X3
X5
VCC
FMSEL1 NERR
NQ1
BYP
GND
Q4
NX1
NQ2
NQ4
FMSEL2
LED
NQ3
NERRI
X2
+
NB
Q1
NX3
W
OEN
GNDS
X1
Q5
Figure 28: Example application of iC-PTxxyy/ iC-PT-Hxxyy in A/B operation x1 interpolated with iC-HF
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 28/41
iC-MH16, iC-MH8, iC-MHM
Figure 29 shows an example driving iC-MH16, a 12bit angular Hall encoder (iC-MH16, iC-MH8, iC-MHMcan also be used). iC-HF provides reverse polarityprotection.
In this example, FMSEL1 and FMSEL2 are low andA/B/Z and U/V/W mode is selected. All 6 channels workas RS-422 line drivers. OEN is set hi and all channelsare enabled. iC-MH16 has no complementary outputs,therefore pins NX1 . . . NX3 from iC-HF are kept discon-nected.
After a valid Encoder Link Sequence all connected sig-nals at X1 to X6 will be directly linked to outputs Q1 toQ6.
NERR output from iC-MH16 is connected to input pinNERRI of iC-HF. Any error occurring either on iC-MH16or on iC-HF will be signaled through NERR output pinfrom iC-HF.
iC-MH16 iC-HF
REVERSEPOLARITYPROTECTION
ERRORMONITOR
INCRINTERFACE
ENCODERLINK
POWERDOWN
RS422output
RS422output
RS422output
RS422output
RS422output
DETECTION
INTERFACE
OVERTEMP
CONTROL REQUEST
NERRFMSEL2
FMSEL1
4.5..5.5V
SERIAL
1
RS422
LOGIC
NERRI
GNDS
VDDS
NERR
NERR
BYPR10kΩ
PoDo
PoDo
EBIS
ECM
VDD
GND
VNDOEN
VPD
VPA
VNA
SLO
NQ4
PTC
OVT
NQ2
NQ1
NQ5
OVT
NQ3
NQ6
NQ1
BYP
1uF 1uF
NX2
NX3
NX1
MA
W
TRI
TRI
SLI
Q3
Q1
Q5
Q4
Q6
Q2
Q1X1
X5
X6
X4
X3
X2
A
V
U
B
Z
W
mto C
V
U
A
B
1
Z
SLO
VNA
Q6X6
Q4
X5Q5
VDD
NX1
NQ6
Q1
VDDS
Q1
NERR
MA
OEN
EBIS
Q3
NQ1
U
FMSEL2
V
TRIZX1
VPA
NERR
W
NQ3
SLI
GND
X3
X4
ECM
NQ1
NX2 NQ2
PTC
NERRI
A
GNDS
VPD
FMSEL1
X2
NX3
NQ5
NQ4
Q2
B
VND
Figure 29: Example application with iC-MH16 in A/B/Z and U/V/W modeMind voltage and current requirements for programming/zapping OTP devices with iC-HF use.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 29/41
iC-MH16 is a BiSS slave. If FMSEL1 from iC-HF is sethi, A/B/Z and BiSS/SSImode is selected and iC-HF canbe used to communicate through BiSS with iC-MH16.This is shown in figure 30.
Signals U, V, and W are replaced by BiSS signals MA,SLO, and SLI. Input RS-422 signals at channels 5 and6 in the example include the adaptation resistors, to-gether with the RS-422 bus termination resistor. Seepage 24 for more information about RS-422 receiverconfiguration.
iC-MH16 iC-HF
REVERSEPOLARITYPROTECTION
ERRORMONITOR
INCRINTERFACE
ENCODERLINK
POWERDOWN
RS422Output
RS422Output
RS422Output
RS422Output
DETECTION
INTERFACE
OVERTEMP
RS422Input
RS422Input
CONTROL REQUEST
NERRFMSEL2
FMSEL1
SERIAL
1
SLO
4..5.5V
RS422
LOGIC
NERRI
VDDS
GNDS
NERR
NERR
tomC
10kΩ BYPR
PoDo
PoDo
MA
SLI
ECM
EBIS
GND
VDD
VNDOEN
VPD
VPA
VNA
SLO
PTC
NQ1
NQ5
NQ2
NQ1
OVT
OVT
NQ4SLO
NQ3
NQ6
1uF
NX1
NX2
1uF
NX3
BYP
MA MA
SLI
TRI
TRI
TRI
TRI
SLI
Q4
Q5
Q3
Q6
Q1
Q1
Q2
X3
X4
X2
X6
X5
X1
A
B
WZ
A
V
B
U
+
Z
_
1
_
+NQ6
Q4
A
GNDS
SLI
ECM
NQ5X5
NERR
Q6
Q1
X3
X4
Q1
NX3
TRI
NX2
GND
MA
NERR
VDD
PTC
FMSEL1
VDDS
NQ1
VPA
X6
OEN
VNA
EBIS
NX1
FMSEL2
WNQ3
NQ2
NERRI
TRI
Q2
V
UX2
TRI
Z
VND
NQ4
Q5
Q3
NQ1
VPD
X1
SLO
B
Figure 30: Example application with iC-MH16 in A/B/Z and BiSS/SSI mode
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 30/41
iC-MU
iC-MU is an off-axis nonius encoder with integrated Hallsensors. An example of iC-MU with iC-HF is shown infigure 31.
In this example, iC-MU is in ABZ function and iC-HFin A/B/Z and U/V/W mode. These signals are deliv-
ered through output pins PB0 to PB2, and PB3. iC-HFprovides reverse polarity protection.
A microcontroller communicates with iC-MU. It can au-tomatically enable/disable iC-HF output channels bydriving OEN pin. NERR from iC-HF is used as externalinterrupt.
iC-MUseries
EEPROM
iC-HF
REVERSEPOLARITYPROTECTION
uC
ANA/DIGOUTPUT
SERINTERFACE
ENCODERLINK
I2CINTERFACE
POWERDOWN
RS422output
RS422output
RS422output
RS422output
RS422output
RS422output
DETECTION
OVERTEMP
CONTROL REQUEST
FMSEL2
FMSEL1
1
4..5.5V
NER
NER
LOGIC
NERRI
VDDS
GNDS
NERR
BYPR
10kΩ
PoDo
PoDo
EBIS
ECM
GND
VDD
OEN
VPD
SDA
VND
VNA
VPA
NQ1
NQ2
OVT
PTC
OVT
NQ6
SCL
NQ5
NQ4
NQ1
NQ3
PB3
PA2
PA1
PA0
1uF
PB2
1uF
NX2
NX3
PB0
PA3
NX1
BYP
PB1
TRI
TRI
TRI
Q1
Q3
Q2
Q5
Q1
Q4
Q6
X1
X6
X2
X4
X5
X3
A
A
BB
ZZ
1
EBIS
NQ2
Q3
Q6
GND
X4
NQ5
X1
NQ6
PTC
VDD
NX2
FMSEL2
VPA
NQ3X3
PA0
VDDS
VNAFMSEL1
Q1
GNDS
PB0
OEN
X6
ECM
TRI
PB1
SDA
NERRI
Q2
NQ1
PB2
NQ1
PB3
Q1
Q5
VND
Q4
PA3
TRI
X2
PA1
VPD
SCL
NX1
NX3
X5
PA2
NQ4
NERR
Figure 31: Example application with iC-MU and microcontroller with iC-HF in A/B/Z and U/V/W mode
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 31/41
Since ECM pin is held hi, it is possible to enter EncoderLink State with the Encoder Link Sequence at pinsQ1/NQ1. iC-HF is in A/B/Z and U/V/W mode, therefore9 Encoder Link lines are in use.
In Encoder Link State, I2C bus lines SCL and SDA aretransmitted in the example through pins NQ1 and NQ2.
A command can be sent to the microcontroller throughI2C to modify the state of iC-MU and select analogmode. In this mode, positive and negative sine, andpositive and negative cosine signals are output via pinsPB0 to PB3. These analog signals are directly linked toiC-HF output pins Q1 to Q4.
iC-MUseries
EEPROM
iC-HF
REVERSEPOLARITYPROTECTION
uC
ANA/DIGOUTPUT
SERINTERFACE
ENCODERLINK
I2CINTERFACE
POWERDOWN
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
CONTROL REQUEST
FMSEL2
FMSEL1
4.5..5.5V
PCMPCM
NCMNCM
NSM
PSMPSM
NSM
1
SDA
LOGIC
SCL
NERRI
GNDS
VDDS
NERR
BYPR
PoDo
PoDo
EBIS
ECM
VDD
GND
SDA
OEN
VPD
VND
VPA
VNA
NQ4
OVT
NQ2
NQ1
NQ1
PTC
OVT
SCL
NQ3
NQ6
NQ5
PA2
PA0
NX3
PB3
NX2
1uF
NX1
PB2
PB1
PB0
BYP
PA1
PA3
1uF
TRI
Q4
Q5
Q6
Q2
Q1
Q1
Q3
X1
X3
X4
X2
X6
X5
1
NQ4
NERRI
VNA FMSEL2
PA1
FMSEL1
Q3
NX2
Q5
PTC
X2
Q1
OEN
NX3
VPD
GND
Q6
NQ2
X6
VPA
Q2
PA3
PB0
VDDS
SCL
X1
PA0
Q1
X3
NQ1
NQ6
EBIS
NQ1
PA2
NERR
PB1
ECM
NQ3
GNDS
VDD
X4
SDA
NQ5
VND
PB3
X5
NX1
Q4
PB2
Figure 32: Example application with iC-MU and microcontroller with iC-HF in Encoder Link State
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 32/41
As shown in figure 33 iC-MU can also be operated as aBiSS slave. Master clock MA is input through, channel5, data input SLI though channel 6, and data outputSLO is sent through channel 4.
iC-MU is initially in ABZ function, and signals are outputin RS-422 protocol by pins Q1, NQ1, Q2, NQ2, and Q3,NQ3. In ABZ function, PB3 provides the error signal
from iC-MU. In the example, this signal is connected toNERRI from iC-HF and transferred through NERR.
PB3 is also connected to NX3 from iC-HF. If iC-MUchanges to analog function and iC-HF enters EncoderLink State, analog signals at PB0 to PB3 will be linkedinside iC-HF and output through pins Q1, Q2, Q3, andNQ3.
iC-MUseries
EEPROM
iC-HF
REVERSEPOLARITYPROTECTION
ANA/DIGOUTPUT
SERINTERFACE
ENCODERLINK
I2CINTERFACE
POWERDOWN
RS422output
RS422output
RS422output
RS422output
DETECTION
OVERTEMP
RS422Input
RS422Input
CONTROL REQUEST
NERR
4.5..5.5V
FMSEL1
FMSEL21
NER
SLO
SLO LOGIC
NERRI
GNDS
VDDS
NERR
BYPR
10kΩ
PoDo
PoDo
MA
MASLI
SLIEBIS
ECM
VDD
GND
SDA
VPD
VND
OEN
VPA
VNA
OVT
NQ5
OVT
SCL
NQ2
PTC
NQ4
NQ1
NQ1
NQ6
NQ3
PB1
PA2
PB3
NX1
BYP
PA3
1uF
PB0
PA1
NX2
NX3
1uF
PB2
PA0
TRI
TRI
TRI
TRI
Q6
Q4
Q3
Q1
Q5
Q2
Q1X1
X6
X5
X4
X2
X3
AA
BB
ZZ
1
_
+
+
_
FMSEL2
PA1
Q2
X5
Q1
NQ4
VPD
X4
EBIS
SDA
Q5
TRI
VDDS
PB3
Q3
NQ2
PB0
PA0
NERR
VND
Q6
X1
NQ1
GNDS
X3
GND
FMSEL1
X2
NERRI
VNA
X6
VPA
TRI
PB2
OEN
NX3
Q1
TRI
Q4
PTC
SCL
NQ1
NX1
NQ5
NQ6
PB1
VDD
PA2
ECM
NQ3
NX2
PA3
Figure 33: Example application with iC-MU and iC-HF in A/B/Z and BiSS/SSI mode
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 33/41
If it is desired to use only three channels of iC-HF (chan-nels 1, 2, and 3), it is possible to implement BiSS com-munication with no need for extra channels. This canbe achieved by using pins NQ1, NQ2, and NQ3. Figure34 shows this example.
To achieve this, iC-HF must be configured either inA/B/Z and U/V/W mode (as in this example) or in A/B/Zand BiSS/SSI mode. In default state, iC-HF is a set
of line drivers and signals. PB0, PB1, and PB2 fromiC-MU are output through channels 1, 2 and 3 as differ-ential signals. With the Encoder Link Sequence at pinsQ1/NQ1, iC-HF enters Encoder Link State. Pins NQ1,NQ2 and NQ3 are directly connected to NX1, NX2 andNX3 respectively. It is possible to access the BiSS in-terface of iC-MU through these three lines, as shown infigure 34.
iC-MUseries
EEPROM
iC-HF
REVERSEPOLARITYPROTECTION
ANA/DIGOUTPUT
SERINTERFACE
ENCODERLINK
I2CINTERFACE
POWERDOWN
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
REQUESTCONTROL
NERRFMSEL2
4.5..5.5V
FMSEL1
1
NERSLO
LOGIC
NERRI
GNDS
VDDS
NERR10kΩ
BYPR
PoDo
PoDo
MA
SLI
ECM
EBIS
VDD
GND
OEN
VND
SDA
VPD
VNA
VPA
NQ2
SLO
PTC
OVT
NQ4
SCL
NQ1
NQ6
NQ5
NQ1
NQ3
OVT
NX3
NX2
PA2
PA1
PA0
NX1
PB3
PA3
1uF 1uF
PB2
BYP
PB1
PB0
MA
SLI TRIQ1
Q4
Q1
Q5
Q6
Q3
Q2X2
X5
X4
X6
X1
X3
AA
BB
ZZ
1
X5NQ5
VDD
NERRI
EBIS
Q6
NX3
VNA
Q4
NQ6
NQ4
PA3
VPA
PTC
PA0
PB1
GNDS
PB2
Q1
X1
Q2
OEN
FMSEL1 NERR
PA1
PA2
X4
X6
NQ2
Q3
Q1
NX2
VND
ECM
Q5
PB0
X2
SDASCL
NX1
GND
PB3
FMSEL2
X3
NQ1
VPD
NQ1
VDDS
NQ3
Figure 34: Example application with iC-MU in A/B/Z mode and iC-HF in Encoder Link State with BiSS atchannels 1,2, and 3
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 34/41
iC-NQC
iC-NQC is a 13-bit sin/cosine-to-digital converter withcalibration and can also be driven by iC-HF, as shownin figure 35. iC-HF provides reverse polarity protectionto the sensor side interface through pins VDDS andGNDS.
In the example, iC-NQC is a BiSS slave node. iC-HF isconfigured in A/B/Z and BiSS/SSI mode through pinsFMSEL2 and FMSEL1. BiSS signals SLO, MA andSLI are carried through iC-HF channels 4, 5 and 6,respectively.
In Encoder Link State the TMA mode of iC-NQC canbe activated to bypass analog sine/cosine signals on A,B, SDA and SCL signals.
In a default mode, channels 1, 2 and 3 from iC-HF areoperated as RS-422 line drivers, outputting A, B andZ signals from iC-NQC. An EEPROM is used in theexample and it is accessed via I2C bus. I2C signals arealso connected to iC-HF input pins NX1 and NX2. IfiC-HF enters Encoder Link State, signals at X1 to X3and NX1 to NX3 will be directly linked to output pins Q1to Q3 and NQ1 to NQ3. Therefore, in this configurationthe I2C bus will be available at pins NQ1 and NQ2.
Error signal from iC-NQC is connected to NERRI ofiC-HF. This allows combining an error event fromiC-NQC with an error event of iC-HF that is signaled atNERR output of iC-HF.
iC-NQCiC-HF
REVERSEPOLARITYPROTECTION
EEPROM
CONTROLLOGIC
ENCODERLINK
INCREMENTAL
POWERDOWN
RS422Output
DETECTIONINTERFACE
INTERFACE
OVERTEMP
RS422Input
RS422Input
CONTROL REQUEST
NERR
E2PROM
4.5..5.5V
OUTPUT
FMSEL1
FMSEL21
SDA
SLO SLO
RS422
RS422
RS422
LOGICSCL
NERRI
VDDA
GNDS
VDDS
GNDA
NERR
NERR
BYPR
10kΩ
PoDo
PoDo
MA
MA
SLI
SLI
EBIS
BISS
ECM
GND
VDDVDD
GND
OEN
SDA
SDA
NQ2
NQ4
OVT
NQ5
NQ1
SCL
OVT
NQ6
SCL
PTC
NQ1
NQ3
SLO
NX1
BYP
NX3
BYPBYP
NX2
1uF1uF
MA
TRI
TRI
TRI
TRI
SLI
TRI
Q3
Q1
Q5
Q1
Q4
Q6
Q2X2
X3
X6
X5
X4
X1
A
A
BB
ZZ
A
B
+
Z
_
_+
1
X4
TRI
NQ5
NERR
NQ6
NQ1
PTC
NQ2
NX1
GNDA
Q3
Q1
EBIS
TRI
NERRI
SCL
NERR
X3
SLI
X5
NQ3
NQ4
ECM
FMSEL1
GNDS
Q4
FMSEL2
OEN
GND
NX3
A X1
X6
BYP
SDA Q6
GND
NQ1
VDDS
Q2
VDD
Z
Q1
B
TRI
TRI
MA
SLO
VDD
X2
NX2
VDDA
Q5
Figure 35: Example application of iC-NQC with iC-HF
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 35/41
ADDITIONAL EXAMPLES
All figures indicate only the basic operation with iC-HF and do not contain all details, connections, configurationsand options for a working system.
8 lines encoder operation for ABZ, BiSS and 5 V power supply
iC-HF iC-HF
REVERSEPOLARITYPROTECTIONREVERSEPOLARITYPROTECTION
ENCODERLINKENCODERLINK
POWERDOWN POWERDOWN
RS422Output
RS422Output
RS422Output
RS422Output
RS422Output
RS422Output
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
DETECTIONDETECTION
OVERTEMP OVERTEMP
REQUEST CONTROLCONTROL REQUEST
FMSEL1
FMSEL2
FMSEL1
FMSEL211
3..5.5V3..5.5V
LOGIC LOGIC
NERRINERRI
VDDS
GNDS
VDDS
GNDS
NERR NERR
BYPRBYPR
PoDoPoDo
PoDoPoDo
ECM
EBISEBIS
ECM
VDD VDD
GNDGND
OEN OEN
NQ1
OVTOVT
NQ2
NQ3
NQ5
NQ4
NQ6
PTC
OVT
NQ5
NQ1
PTC
NQ2
NQ3
OVT
NQ1
NQ6
NQ1
NQ4
SLO SLO
1uF
NX2
NX1
BYP
NX3
NX1
1uF
NX2
BYP
1uF
NX3
1uF
MAMA
TRI
SLI SLI
TRI
Q1
Q1
Q2
Q6
Q4
Q2
Q3 Q3
Q4
Q5
Q6
Q5
Q1
Q1
X6
X2
X1
X5
X3
A+
X6
X4
B+
X1
X2
X4
X5
X3 Z+
B-
A-
Z-
A
B
Z
1 1
Q2
Q3
X4
PTC
X3
FMSEL2
NERRI
NQ5
PTC
Q2
Q1
FMSEL1
X1
X5
NQ4
OEN
GNDS
VDD
ECM
NQ4
NERR
NQ1
X3
X4
Q6
NQ1
NQ6
FMSEL2
NQ2
EBIS
NQ3
EBIS
NERRI
X2
Q6
NX3
NERR
NX1
NQ1
Q1
Q5
X6
NX1
Q4
FMSEL1
GND
X1
NQ5
Q5
NX3
VDD
X5
Q3
NQ3
NQ2NX2
Q4
NQ1
GNDS
X6
Q1
NQ6
VDDS VDDSGND
NX2
OEN
ECM
X2
Q1
Figure 36: iC-HF with BiSS + A/B/Z using only 8 linesThe left side of figure 36 shows the standard operationof the incremental encoder with differential lines ofA+/A-, B+/B-, Z+/Z-, and 5 V power supply. With activeEncoder Link State figure 36 on the right side showingthe Encoder Link State operation of the incrementalencoder with TTL lines of A, B, Z, BiSS(MA), BiSS(SLI),BiSS(SLO), and 5 V power supply.
The NERR signal is optional and incorporates a sen-sor’s NERR signal and the iC-HF line driver error status.
The SLI signal is only required if the sensor needs tobe operated in a BiSS bus structure or if MO control isrequired.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 36/41
iC-MU with P2P BiSS and iC-HF in Encoder Link State
iC-MUseries
iC-HF
REVERSEPOLARITYPROTECTION
ANA/DIGOUTPUT
SERINTERFACE
ENCODERLINK
POWERDOWN
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
REQUESTCONTROL
NERRFMSEL1
FMSEL2
4.5..5.5V
1
SLO
SLO LOGIC
NERRI
GNDS
VDDS
NERR
BYPR
10kΩ
PoDo
PoDo
n.c.
MA
MA
ECM
EBIS
VDD
GND
SDA
OEN
VND
VPDVPA
VNA
PTC
NQ1
NQ2
NQ6
NQ1
OVT
OVT
SCL
NQ4
NQ5
NQ3
PA1
PB0
PB1
PA2
PA3
BYP
PA0
1uF
NX1
PB2
1uF
NX2
PB3
NX3
TRIQ1
Q6
Q1
Q3
Q2
Q5
Q4
X2
X4
X3
X5
X1
X6
A
B
Z
1
PA3
PB0
NQ6
X4
NERRI
PB2
X1
X2
VND
PA1
NQ5
EBIS
X6
VDDS
NQ4
NX3
FMSEL1
Q6
PTC
Q1
NX2
X5
NX1
Q5
Q3
NQ1
PB3
Q2
VDD
NQ1
SCL
X3
Q4
SDA
GNDS
FMSEL2
NERR
NQ2
NQ3
PA0
VNA
VPD
ECM
GND
OEN
PA2
Q1
VPA
PB1
Figure 37: iC-MU with TTL ABZ and TTL BiSS (MA + SLO)The iC-MU is forced to be operated with BiSS by PA0to GND.
The iC-MU SLI input can be forced to GND if the BiSScommunication is point-to-point.
With active Encoder Link State figure 37 shows the En-coder Link State operation of the incremental encoder
with TTL lines of A, B, Z, BiSS(MA), BiSS(SLO), and5 V power supply.
The NERR LED signal is optional and incorporates asensor’s NERR signal and the iC-HF line driver errorstatus.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 37/41
iC-LNB with SPI and iC-HF in Encoder Link State
iC-LNB
iC-HF
REVERSEPOLARITYPROTECTION
uC
ENCODERLINK
POWERDOWN
LEDCONTROL
SINE/COSINE
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
EncoderLink
DETECTION
OVERTEMP
CONTROL REQUEST
Power-On
NERR
MOSI
MISO
FMSEL1
FMSEL21
4..5.5V
SCK
MISO1
LOGIC
MOSI1
MOSI2
MISO2
NERRI
PCOS
NCOS
GNDS
VDDS
DOUT
NERR
SCK1
NCS1
SCK2
NCS2
BYPR
PoDo
PoDo
TEST
MISO
MOSI
INCB
INCA
PSIN
ECM
NSIN
EBIS
VDD
GND
VDD
GNDGND
VDD
INCZ
SCK
OEN
POKPAR
SER
ERR
OVT
OVT
NQ4
PTC
NQ2
NQ3
TPC
CLK
NQ1
TNC
NQ6
NQ5
LED
NQ1
BYP
NX2
1uF
1uF
TNS
TPS
NSL
NX1
NX3
XJD
DIN
INC
SPI
GB
TRI
GA
CS
Q4
Q5
Q2
Q6
Q3
Q1
Q1
X2
X5
X4
X3
X6
X1 A
B
Z
1
X2
X1
GND
PCOS
FMSEL1
NX1
NSIN
SCK
VDD
Q5
ECM
NQ6
LED
MOSI1
SCK1
TPS
CS
GA
PSIN
VDD
TNC NQ3
Q6
NCS1
XJD
TPC
NQ4
DOUT
GBNERR
Q3
Q2
GND
TNS
NERRI
MOSI2
VDDS
FMSEL2
NQ1
X3
OEN
MISO2
INCZ
Q4
NQ2
GND
DIN
VDD
POK
Q1
MISO1
X4
NCS2
ERR
NX2
NCOS
MISO
SCK2
NX3
NSL
PTC
CLK
INCB
Q1
X6
NQ5
NQ1
GNDS
EBIS
INCA
MOSI
X5
Figure 38: iC-LNB with TTL ABZ and TTL SPI in Encoder Link StateThe iC-LNB is configured by the sensor’s microcon-troller via SPI where iC-LNB is the SPI slave and themicrocontroller is the SPI master.
The microcontroller and its flash ROM is configuredand accessed by an additional 3 wire capable SPIcommunication where microcontroller is the SPI slaveand the external host is the SPI master.
With active Encoder Link State figure 38 shows theEncoder Link State operation of the incremental en-coder with TTL lines of A, B, Z, SPI(CLK), SPI(MISO),SPI(MISO), and 5 V power supply.
The NERR signal is optionally available and incorpo-rates a sensor’s NERR signal and the iC-HF line drivererror status.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 38/41
DESIGN REVIEW
iC-HF YNo. Function, parameter/code Description and application notes
None at time of release.
Table 13: Notes on chip functions regarding iC-HF chip release Y.
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 39/41
REVISION HISTORY
Rel. Rel. Date∗ Chapter Modification PageA1 2014-03-21 Initial release.
Rel. Rel. Date∗ Chapter Modification PageB1 2014-12-10 ABSOLUTE MAXIMUM RATINGS Item G009: increased from 2 kV to 4 kV 6
ELECTRICALCHARACTERISTICS
Item 506: R Termination = 120Ω added 8
ELECTRICALCHARACTERISTICS
Item 901: Optional CPTC 10nF added 8
CHANNEL DESCRIPTION OEN and TRI description added 9INTERNAL PROTECTION ANDERROR SIGNALING
Internal signal TRI description added 16
ENCODER LINK SEQUENCE Time diagram of the Encoder Link Sequence updated and FMSELx signals removed 20ENCODER LINK SEQUENCE iC-PTxxyy mode control updated and iC-PT-Hxxyy mode control added 21ENCODER LINK SEQUENCE External capacitor CPTC option added 21APPLICATION EXAMPLES Figure 27 example application of iC-PTxxyy/ iC-PT-Hxxyy updated and OTP devices
application detail added25
TRI added in relevant figures on pages 1, 9, 11. . . 14, 16. . . 19, 25. . . 35 1. . . 35
Rel. Rel. Date∗ Chapter Modification PageC1 2016-04-08 ELECTRICAL
CHARACTERISTICSItem 303: Ilk range updated from ±12µA to ±35µA 8
APPLICATION EXAMPLES Figure 29: iC-MH16 added 28APPLICATION EXAMPLES Figure 38: updated wiring quadrature encoder application only 37
Rel. Rel. Date∗ Chapter Modification PageD1 2018-05-17 All Figures updated, blue body 1 . . . 36
APPLICATION EXAMPLES iC-MH replaced by iC-MH16 3, 17, 25,27, 28
PACKAGING INFORMATION Thermal Paddle TP renamed to Backside Paddle BP 4ELECTRICALCHARACTERISTICS
Item 009, 010 and 011 added 7
APPLICATION EXAMPLES NERRI detail on pull resistor in figures added 26 . . . 33FUNCTION DESCRIPTION Figure ?? and Figure ??BBL) updated ?? and
??
Rel. Rel. Date∗ Chapter Modification PageD2 2018-10-12 ELECTRICAL
CHARACTERISTICSItem 303: symbol updated to Vi(Qx), Vi(NQx) 8
RS-422 RECEIVERCONFIGURATION
Table 10: Vi updated to Vi(Qx), Vi(NQx) 24
RS-422 RECEIVERCONFIGURATION
Figure 26 input pins Vi updated to Vi(Qx), Vi(NQx) 25
RS-422 RECEIVERCONFIGURATION
Note regarding 5 V RS422 and full RS422 voltage range added 25
RS-422 RECEIVERCONFIGURATION
Example layout for RS422 input receivers added 25
DESIGN REVIEW Chapter added 38
Rel. Rel. Date∗ Chapter Modification PageD3 2018-12-21 ENCODER LINK SEQUENCE Figure 22 and related description updated 22
∗ Release Date format: YYYY-MM-DD
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
Rev D3, Page 40/41
iC-Haus expressly reserves the right to change its products and/or specifications. An Infoletter gives details as to any amendments and additions made to therelevant current specifications on our internet website www.ichaus.com/infoletter and is automatically generated and shall be sent to registered users by email.Copying – even as an excerpt – is only permitted with iC-Haus’ approval in writing and precise reference to source.
The data specified is intended solely for the purpose of product description and shall represent the usual quality of the product. In case the specifications containobvious mistakes e.g. in writing or calculation, iC-Haus reserves the right to correct the specification and no liability arises insofar that the specification was froma third party view obviously not reliable. There shall be no claims based on defects as to quality in cases of insignificant deviations from the specifications or incase of only minor impairment of usability.No representations or warranties, either expressed or implied, of merchantability, fitness for a particular purpose or of any other nature are made hereunderwith respect to information/specification or the products to which information refers and no guarantee with respect to compliance to the intended use is given. Inparticular, this also applies to the stated possible applications or areas of applications of the product.
iC-Haus products are not designed for and must not be used in connection with any applications where the failure of such products would reasonably beexpected to result in significant personal injury or death (Safety-Critical Applications) without iC-Haus’ specific written consent. Safety-Critical Applicationsinclude, without limitation, life support devices and systems. iC-Haus products are not designed nor intended for use in military or aerospace applications orenvironments or in automotive applications unless specifically designated for such use by iC-Haus.iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trademark rights of a third party resulting from processing or handling of the product and/or any other use of the product.
Software and its documentation is provided by iC-Haus GmbH or contributors "AS IS" and is subject to the ZVEI General Conditions for the Supply of Productsand Services with iC-Haus amendments and the ZVEI Software clause with iC-Haus amendments (www.ichaus.com/EULA).
preliminary preliminary iC-HF6-CH. ENCODER LINK, RS-422 DRIVER/RECEIVER
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ORDERING INFORMATION
Type Package Options Order Designation
iC-HF QFN32 5 mm x 5 mm iC-HF QFN32-5x5
EvaluationBoard
100 mm x 80 mm eval board iC-HF EVAL HF1D
Please send your purchase orders to our order handling team:
Fax: +49 (0) 61 35 - 92 92 - 692E-Mail: [email protected]
For technical support, information about prices and terms of delivery please contact:
iC-Haus GmbH Tel.: +49 (0) 61 35 - 92 92 - 0Am Kuemmerling 18 Fax: +49 (0) 61 35 - 92 92 - 192D-55294 Bodenheim Web: http://www.ichaus.comGERMANY E-Mail: [email protected]
Appointed local distributors: http://www.ichaus.com/sales_partners