Features• Multi-sensing wireless platform implementing vibration monitoring and ultrasound

detection• Updated version of STEVAL-STWINKT1, now including STSAFE-A110

populated, BlueNRG-M2SA module and IMP23ABSU MEMS microphone• Built around STWIN core system board with processing, sensing, connectivity

and expansion capabilities• Ultra-low-power ARM Cortex-M4 MCU at 120 MHz with FPU, 2048 kbytes Flash

memory (STM32L4R9)• Micro SD Card slot for standalone data logging applications

• On-board Bluetooth® low energy v5.0 wireless technology and Wi-Fi (with STEVAL-STWINWFV1 expansion board), and wired RS485 and USB OTG connectivity

• Option to implement Authentication and Brand protection secure solution with STSAFE-A110

• Wide range of industrial IoT sensors:– ultra-wide bandwidth (up to 6 kHz), low-noise, 3-axis digital vibration sensor

(IIS3DWB)– 3D accelerometer + 3D Gyro iNEMO inertial measurement unit

(ISM330DHCX) with machine learning core– ultra-low-power high performance MEMS motion sensor (IIS2DH)– ultra-low-power 3-axis magnetometer (IIS2MDC)– digital absolute pressure sensor (LPS22HH)– relative humidity and temperature sensor (HTS221)– low-voltage digital local temperature sensor (STTS751)– industrial grade digital MEMS microphone (IMP34DT05)– analog MEMS microphone with frequency response up to 80 kHz

(IMP23ABSU)• Modular architecture, expandable via on-board connectors:

– STMOD+ and 40-pin flex general purpose expansions– 12-pin male plug for connectivity expansions– 12-pin female plug for sensing expansions

• Other kit components:– Li-Po battery 480 mAh– STLINK-V3MINI debugger with programming cable– Plastic box

DescriptionThe STWIN SensorTile wireless industrial node (STEVAL-STWINKT1B) is adevelopment kit and reference design that simplifies prototyping and testing ofadvanced industrial IoT applications such as condition monitoring and predictivemaintenance.

Product summary

STWIN SensorTileWireless IndustrialNode developmentkit and referencedesign for industrialIoT applications

STEVAL-STWINKT1B

Firmwarefor STEVAL-STWINKT1Bevaluation kit

STSW-STWINKT01

Ultra-low-powerARM Cortex-M4MCU with FPU

STM32L4R9ZIJ6

3D Accelerometer+ 3D GyroiNEMO Inertialmeasurement unit(IMU) with machinelearning core

ISM330DHCX

Ultra-widebandwidth (up to 6kHz), low-noise, 3-axis digital vibrationsensor

IIS3DWB

STWIN SensorTile Wireless Industrial Node development kit and reference design for industrial IoT applications

STEVAL-STWINKT1B

Data brief

DB4345 - Rev 2 - December 2020For further information contact your local STMicroelectronics sales office.

www.st.com

Product summary

Firmware debug andupdate interface

STLINK-V3MINIdebugger

Applications

IoT for Smartindustry

ConditionMonitoringand PredictiveMaintenance

Industrial Sensors

The kit features a core system board with a range of embedded industrial-gradesensors and an ultra-low-power microcontroller for vibration analysis of 9-DoF motionsensing data across a wide range of vibration frequencies, including very highfrequency audio and ultrasound spectra, and high precision local temperature andenvironmental monitoring.

The development kit is complemented with a rich set of software packages andoptimized firmware libraries, as well as a cloud dashboard application, all provided tohelp speed up design cycles for end-to-end solutions.

The kit supports Bluetooth® low energy wireless connectivity through an on-board module, and Wi-Fi connectivity through a special plugin expansion board(STEVAL-STWINWFV1). Wired connectivity is also supported via an on-boardRS485 transceiver. The core system board also includes an STMod+ connector forcompatible, low cost, small form factor daughter boards associated with the STM32family, such as the LTE Cell pack.

Apart from the core system board, the kit is provided complete with a 480 mAh Li-Pobattery, an STLINK-V3MINI debugger and a plastic box.

STEVAL-STWINKT1B

DB4345 - Rev 2 page 2/12

1 Application overview

Predictive maintenance applications collect and process data from a wide variety of sensors in order to identifypotential failures in machinery before they happen. A principal requirement of such applications is that thecondition monitoring equipment is placed very close to relevant machine componentry for the data to be reliable,which is why the STWIN node is designed to be small but robust, self-powered and capable of wirelesscommunication.Another application issue is the high volumes of preferably real-time data processing involved, which canoverwhelm centralized monitoring and control systems, and corresponding communication networks. Distributed(or decentralized) computing architectures represent a valid solution to this problem by performing data pre-processing and analytical operations directly on the node. The STWIN kit supports and can demonstratethis concept through sample applications in the firmware package running on the STM32L4+ ultra-low-powermicrocontroller embedded on the core system board.

Figure 2. STEVAL-STWINKT1B functional block diagram

SPI3

ADC1

USART2

EnancedSWD

Connector

UART5

I2C2ADC3GPIOAuxiliary

Connector

DFSDM1

I2C2

IMP34DT05Digital Microphone

LPS22HHPressure Sensor

HTS221Humidity and

Temperature Sensor

STTS751Temperature Sensor

IIS2MDC3D Magnetometer

STM32L4R9ZIJ6MicrocontrollerUltra Low Power

Cortex M4F@120MHz

32 kHzCrystal

16 MHzCrystal

BlueNRG-M2SABluetooth® low energy

Application Processor Module

STR485LVRS485 Interface

SPI2

IMP23ABSUAnalog Microphone

TS922EIJTLow noise, low

distortion OpAmp

20-pin STMOD+

12-pin female sensor connector

12-pin maleconnector

40-pin Flex

STSAFESecure Element*

I2C2

SPIx, I2S, USARTx,...

IIS2DH3D Accelerometer

IIS3DWBVibrometer

ISM330DHCX6-Axis IMU

USBLC6-2P6USB ESD protection

ESDALC6V1-1U2Single Line ESD

protection

EMIF06-MSD02N16EMI filter and ESD

protection

STBC02Li-Ion linerar battery

charger

ST1PS01EJRstep-down switching

regulator

LDK130Low Noise LDO

Sensing

Processing

Connectivity

Power Mng.

Analog

Secure

* not mounted

connector

connector

Finally, the actual sensing equipment can be subject to a very wide range of low frequency (imbalance ormisalignment), medium frequency (worn gears or bearings) and high frequency (worn cooling fan bearings)vibrations, which is why our node carries several high performance accelerometers, IMUs and magnetometers,capable of detecting movement along 9 axes to a very high degree of sensitivity. For very high frequencies inthe order of tens of kilohertz, vibration analysis is covered by sound and ultrasound applications based on datacoming from a digital microphone and a high performance analog microphone, respectively.

STEVAL-STWINKT1BApplication overview

DB4345 - Rev 2 page 3/12

2 Schematic diagrams

Figure 3. STEVAL-STWINKT1B schematic (1 of 7)

2.7 V Analog LDO

5

V_USB

SW_SEL

ESDALC6V1-1U2

C22

TP2

EN

SH1

10uF

CON2

1

ENB2

U16

DCDC_1

SH2

OTG_FS_DP

DCDC_1

R12

VBat

B4AG

ND

IN2F5

TH

1

R13

USB-MICRO

3

SW1_OA

100kR15 1M

E3VOUT

D1

1OUT

C23

3V3_LDO

20KNC2

D3

A3

E1

TH

1

OTG_FS_DM

F4

C4BATMS

C2

USB

CHGE1C5

SYS1

LDK130PU-R

6IN

IN1E5

3V3 150mA.

SW2_IF2

E4

4EN

5V

4

DCDC_1

C_EN

3V3_SD_485

R23

BAT_NTC

F3SW1_I

VIN

BAT_NTC

47.5K

4.7uF

2k

TH

1

SYS3D2

CHRG

RESET_NOW

CENB1

C1

VIN

STBC02AJR

LDO

3

EXT 5V 3.3V DC-DC

NCC3

V_USB

5V

100k

A4ISETD4IPRE

SYS

56K

22uF

DCDC_1

ADJ

A3

R11

RST_PENDING

A1

2k

VOUT

D1

U18

3V3_Ext

SW_SEL

R17

6D4

PWR

1

E1PGOOD

GNDD2

Battery Connector

A1

D0

NC

5

Battery managementDCDC_2_EN

3V3 400 mA

3V3 400mA.

(4.2 V -> 3 V)Battery monitor

3

R22

C15

VBat

BUTTON_PWR

20K

C27

SW2_OAF1

D42

DCDC_1

L2 2.2uHA1

D0C1

B2

R21 0R

VBUS4

D3

C21 10uF

R10

BAT2B5

D5SYS2

R20

C20 1uF

NCSB17100k

J5

SB23 0R

TP7C1

1

1

5

SB22

2

C25 10uF

R16C12

10uF

C18

VBat

D1

ST1PS01EJR

SW

SW2_OB

SW_SEL

uC_ADC_BATT

SB12 0R

DCDC_2

USBLC6-2P6

2GND

GN

DA3

1uF

PGOODLED_C

Red

2

C3

22

1

DCDC_2

R18

1

J4

2

STRIP254P-M-2

U10DCDC_1

BUTTON_PWR

TP3VBat

E3SW1_OB

C3E3

nRESET

E2

100mA 10mA

TP1

R19 0R

U15

2V7A

PGOODGND

D222uF

R14

B2

ST1PS01EJR

SW

D11

3

100nF

1

2

C24

BATT

L1 2.2uH

NC

4

2

BAT1A5A2

2G

ND

SYS

D2WAKEUP

100K

U14

1uF

V_USB

BATMSNC (10k )

BATMS

B3BATSNS

NTCD1

DCDC_1

1

C26

BATSNSFV

DB

4345 - Rev 2

page 4/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Figure 4. STEVAL-STWINKT1B schematic (2 of 7)

NC

10

STMOD4

SPI2_MISO_p2

3

4S1

3-4SEL

40

8

16

DSI_D1_N

20

18

21

EX_RESET7

7

PC5/WKUP5

13

2

12

19

PG10

PB14

3-4SEL

15

17

EX_PWM

SYS

PG10

17

3V3_Ext

10 PG12

USART3_RTS

10

3

DSI_CLK_N

D3

PG918

1

PB11

16

29

VEXT 26

SPI2_MOSI15

PA9

PB9

USART3_CTS

920

C60100nF

31

STMOD2

I2C4_SCL

4

CN1

FH34SRJ-40S-0.5SH(99)

1-2SEL

13

PA0

3

PG9

DSI_D0_P

25

3

DSI_D1_PUSART3_CTS

1S1

12STMOD2

5

30

8

U17

STG3692

19

1

I2C4_SDA

GND

VEXT

32

SPI2_MISO

SYS

STMOD2

14

1-2SEL

4S214

SPI2_CLK

STMOD4

7

USART1

WKUP5

TIM, DSFDMCLK

TIM

TAMP, WKUPDSI_TE,TIM,LPUART_TX

DCDC_1

4

11

2S1

VCC

I2C4_SDA

2

33

2

EX_PWM

17

4

11

27

STMOD3

DSI_D0_N

1STMOD3

9

PA1

SPI2_MISO_p2

35

38

2S26

14

I2C4_SCL

34

PC5/WKUP5

5V

24

STMod+ interfacePE9

6

SPI2_MOSI_p2

PB8

9

2

28

PG12

1

EX_RESET

36

D21S2

13

PB1416

J3

CN2

PA10

6

39

VEXT

3S1

23

5

PC13

3S2STMOD4

D1USART3_RX

5

STMOD3

37

SPI2_MOSI_p2

EX_ADC

15

EX_ADC

SAI2

CAN, TIM, DSFDM,I2C1

TIM,DSFDMD2TIM

ADC_IN5ADC_IN6

EX_CN

USART3_TX

22

11

8 DSI_CLK_P

DCDC_1

12

D4

DB

4345 - Rev 2

page 5/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Figure 5. STEVAL-STWINKT1B schematic (3 of 7)

INT2_DH

I2C2_SDA

CS

VDD

SCL/SPCC13

100nF

INT1

3V3_Sensors

4

C14

100nF

SPI3_MISO

OCS_Aux

VDD

R47.5k

C1

9

14

2

CS

2

SPI3_MISO

8

5

5

SDO_Aux 1OCS_Aux

SCL

6

RES

12

C8

100nF

6

3

SDA

5

INT2_DHC

1

INT2_ADWB

TP4U9

ISM330DHCX

SPI3_CLK

GN

D1

NC

111

C58

10uF

8

GN

D2

SCx

3

CS

VDD

CS

13

VDD

INT

3V3_Sensors

7

I2C2_SCL

C31

100nF

5

4

104

SDO/SA0

I2C2_SCL

GND

INT1

GN

D

5

U6

SDO/SA0

U2HTS221

INT2

SPI3_MOSI

9

C56100nF

3

9

I2C2_SCL

3

12

3V3_Sensors

4

C17100nF

I2C2_SDA

SCL

3

3V3_Sensors

8

3V3_Sensors

SPI3_MOSI

TP6

10

C40

100nF

1

C57

100nF

SDA

U3LPS22HH

3

6

DRDY

5

11

I2C2_SDA

3V3_Sensors

GN

D2

5

SCx

3V3_Sensors

2

INT1

R57.5k

SPI3_CLK

U12

TP8

3V3_Sensors

9

CS_DH

SPI3_MOSI

CS_ADWB

SCL

SDO/SA0

J6

Sensors and digital mic current monitoring

13

4

12

SPI3_CLK

7

VDD

IO

CSINT_DRDY

6-AxisAcc + Gyro

Pressure

SPI3_MISO

INT1_ADWB

SDO_Aux

3V3_Sensors

28

614

SDA

3V3_Sensors

GN

D2

1

4

7

TP5

SDA/SDI/SDO

C11

10uF

SCL/SPC

SDO/SA01

9

10

SPI3_CLK

1

U11SPI3_MOSI

1

INT_HTS

2

2

I2C2_SMBA

6

SDA/I/O

I2C2_SCL

VDDVDDIO

3V3_Sensors

VDDIO

SDA/I/O

12

I2C2_SDA

3V3_Sensors

CS

7

6

I2C Addr: 1001000b

I2C Addr: 0011110b

I2C Addr: 1011111b

I2C Addr: 1011101b

8

3V3_Sensors

GN

D1

EV

11

SCL

INT_M

7

10

INT2

VDD

IO

C190.22uF

C59

100nF

SPI3_MISO

3V3_Sensors

10

GN

D

GND3

NC

2

Therm

2

INT2

3V3_Sensors 3V3_Sensors

1

SDA

Magnetometer

Vibrometer

Humidity & Temperature

U13IIS2MDC

3V3_Sensors

GN

D1

VDD

NC3

3V3_Sensors

2

C37

4.7uF

C16

100nF

3

VDDINT1_DHC

6

I2C2_SCL

INT_STT

CS_DHC

DCDC_1

SDx

SCL

4

GND2

I2C2_SDA

SDx

TP9

VDD_IO

GND

RES

3V3_Sensors11

GND2

Accelerometer

Temperature

IIS3DWB

STTS751

IIS2DH

DB

4345 - Rev 2

page 6/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Figure 6. STEVAL-STWINKT1B schematic (4 of 7)

U4

X1

16MHz

STM32L4R9ZIJ6

CS_WIFI

I2C3_SDA

2

F10

J1

G5

M6

SAI1_MCLK_A

PF12

PB1

C6

VDD

USB

A9

C11

R34.7k

PH1-OSC_OUT

INT1_DHC

H9

G3

PGOOD

WIFI_BOOT0

L6

PD15

SWDIO

R341k

G7

D2

ESDALC6V1-1U2

RESET

PF0

BOOT0-PE0

E9

PA0

PB10

F7

K8

PC0

C1

VDD_uC

VSS4

SPI1_MOSI

1

J9

PB11

B2

K9

LED2

SDMMC_D3

10

2

PA10

C49

6.8pF

OSC32_OUT

PA9

PG5

PF2

PG9

INT1_ADWB

E11

PG10

PG7

C45

100nF

LED2Orange

R24.7k

INT_M

Differential pairs100 OHM

R324.7k

D3

ESDALC6V1-1U2

LED2

SPI3_MISO

B1

EX_PWM

PA10

I2C2_SMBA

VBAT

VSSD

SI

CHRG

R334.7k

INT_STT

CS_ADWB

D4

VDD

AC5

5.6pF

PC14-OSC32_IND1

H6PF15

SPI2_MISO

WIFI_DRDY

B8

PD12

I2C4_SDA

PF7

PA15

SDMMC_D1

H10

L2

PD3

PA1PE2

A8

C3

VDD_uC

PD7

PB9

PD9

7

PC13

VDD

5

J2

PE11

PC1

L11

USART2_TX

BOOT0-PE0

PC9

PA14/SWCLK

C12

PD8

SPI2_MOSI_p2

H7B12

PB8

PE3

M10

PA5L4

C48

1uF

RESET

OSC32_OUT

STSAFE_RESET

VDD

1

C35

100nF

PB14

R35560R

PC2

PD14

I2C4_SCL

DSI_D0_P

G12

VDD

4

PF5

1

2

USART3_RTS

DAC1_OUT1

DFSDM1_CKOUT

5

H12

PD0

M3

E2

PE15

PF1

PF14

PC11

PE5

PG10

E3

C41

4.7uF

SWDCLK

PD6

INT2_ADWB

G8

PA0/WKUP1

PF6

USART2_TX

SDMMC_D0

K3

PA8

F11

D11

VSS5

E12

NRST

H3

4

PB5

PB3

PC4

G4

4

L5

VDD

2

PB12

A10

USART2_RX

PG3

PA6

K10

OSC_IN

11

C39

100nF

J12

PB14

VREF

+

C10

D12PC6

OSC32_IN

PA11

INT2_DHC

E1

A6

M8

VDD

IO2_

1

PG1

USART3_TX

4

A11

VSS3

INT2_DH

DSI_CLK_N

K12

PG6

PE7G6

E4

DFSDM1_D7

F9

3

1

SAI1_SD_B

BUTTON_PWR

M7

WIFI_WAKEUP

1

PE14

SDMMC_CK

G9

C7

SAI1_SD_A

PD4

PE8

CS_DH

PB2

2V7A

H5

DSIHOST_D0P

SPI1_CLKPG2

PE4D3

J10

SD_DETECT

PC8

PD1

PC10

B7

E10

I2C4_SCL

8

BOOT0-PE0D8

SPI3_MOSI D5

B3

I2C2_SCL

SWDCLK

PE13

PF9

OSC32_IN

K5

K1

J4

12

A7

H4

BLE_RST

USART3_RX

B10

VDD

6

D6

F4

VDD_uC

PG12

1

INT_HTS

DSIHOST_D1P

RTC_TAMP1

H11

PA3SAI1_FS_A/DFSDM_D3

B9

J6

C2

C9

uC_ADC_BATT

PG8

DSI_D1_N

SPI2_CLK

PB6

VSS6

G11

2

G2

ADC1_IN2

PA4

VSS9

J7

STM32 Current monitoring

PA1

M4

K4

A5

B4

F12

PB4

SPI1_MISO

2

VDD_uC

PE12

R110k

C4

PD10

PC3

H8

14

OSC_OUT

PB15

6

9

A12

PE10

PG0

M5

D7

PF3

VDD

IO2_

2

H1

I2C2_SDA

E5

PH0-OSC_IN

1

OSC_OUT

I2C3_SCL

PC5/WKUP5

USART3_CTS

PH3-BOOT0A4

L12

I2C2_SDA

L10PF10

I2C4_SDA

C38

100nF

C1

100nF

DSIHOST_D0N

PA13/SWDIO

EX_ADC

PC13/WKUP2

3-4SEL

1

C6

5.6pF

SPI2_MOSI

EX_RESET

BLE_SPI_CS

DSI_D0_N

PD13

DSIHOST_D1N

DSIHOST_CKP

H2

G10

SDMMC_D2

3

PF13

K7

PG13

OTG_FS_DM

K11

K2

2V7A

PC12

PE12

D9

J11

BLE_TEST9

PG12

C50

100nF

E8

LED1

D10

A1

PB0

VSS1

USART2_RTS

2

C46

10nF

L9

PB7

PC7

PD2

B6

VDD_uC

C436.8pF

RESET

J8

PF8

VDD

3

F1

G1

PC5/WKUP5

C42

100nF

C32

100nF

SW_SEL

PA9

A2

1

13

PE0

D2

VSS2

PC15-OSC32_OUT

DCDC_2_EN

C_EN

M1

F2

2

E6

2

2

VDD_uC

PB11

AGND

EXTI_LINESEXTI0 --> USR ButtonEXTI1 --> BLEEXTI2 --> INT2_DH or INT2_ADWBEXTI3 --> BLE_TEST9EXTI4 --> INT2_DHCEXTI5 --> WKUP_INTEXTI6 --> HTS EXTI7 --> PGOODEXTI8 --> INT1_DLCEXTI9 --> MagEXTI10 --> PWR_BTN EXTI11 --> WiFiEXTI12 --> EX_CNEXTI13 --> TAMP,WKUP ExtEXTI14 --> INT1_ADWBEXTI15 --> INT_STT

USR/BOOT

VCAP

DSI

BLE_TEST8

ADC1_IN1

PB8

RESET

1-2SEL

VDD

7

PG4

K6

DSI_CLK_P

PF11

VDD_uC

PE6/WKUP3

F5

PG9

VSS8

1

USART2_RX

PA2/WKUP4

B5

CHRG

LED1Green

SDMMC_CMD

J7

M12

PA7

J2

STDC14

PE9

M9

SAI1_SCK_A

DSIHOST_CKN

A3PB9

M2

DCDC_1

3

WIFI_RST

E7

J3

C8

PE1

OTG_FS_DP

LED1

C34

100nF

L3

X232.7680KHZ

SP1

L8

PD11

VSS7

C5

SPI3_CLK

PD5

OSC_IN

F6

B11

M11

I2C2_SCL

PF4

CS_DHC

PE9

Close toVREF/VDDA

Close to VDD/VDDIO2

Close toVDDUSB

SWDIO

BLE_INT

C44

100nF

PA12

J5

L7

PB13

DSI_D1_P

C7

2.2uF

VSSA

/VR

EF-

C36

1uF

L1

F3

USR

3

4

DFSDM1_DATIN5 C47

100nF

SPI2_MISO_p2

F8

DB

4345 - Rev 2

page 7/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Figure 7. STEVAL-STWINKT1B schematic (5 of 7)

AudioCoupon Connector

HP Filter --> fc = 15.9 HzLP Filter --> fc = 99.4 KHzDAC for mic bias

DFSDM_D2DFSDM_D5

DCDC_1

3V3_Sensors

2V7A

2V7A

2V7A

SYS

DFSDM1_DATIN5

DFSDM1_CKOUT

DFSDM1_CKOUTDFSDM1_D7

SAI1_FS_A/DFSDM_D3

SAI1_MCLK_ASAI1_SD_A SAI1_SCK_A

I2C2_SDAI2C2_SCL

SAI1_SD_B

DAC1_OUT1

ADC1_IN2

ADC1_IN1

PE12

R74.7k

C2100nF

C51100nF

R81M

CN4M55-6001242R

a1 b1a2 b2a3 b3a4 b4a5 b5a6 b6

C910nF

U8TS922EIJT

Vcc-C2

+IN2C3

OUT2A3

-IN2

B3Vcc+

A2

OUT1A1

-IN1

B1

+IN1C1

C5410nF

C551uF

R2810k

M1

DOUT1

GN

D1

2

GN

D2

3

VDD5

GN

D3

4

SB110R

C10100nF

C521uF

M2

DOUT4

LR2

GN

D5A

VDD1

CLK3

GN

D5B

GN

D5D

GN

D5C

R6100k

R91M

SB10NC

R29160

C301uF

MREF

M1 M1P_FILT

M1P_FILT

MREF

M1P

MREF_DIVMREF

RE

CLK_Ex

EP11

2

10A

SDMMC_D2

CM

D

USART2_RTS

3

SB25 0R

11

U1 EMIF06-MSD02N16

4

RDAT3_GND

DETGNDA

SDMMC_CMD

17

10

C2910nF

7DAT0_Ex

SD

Micro-SD

6

CLK_In

3V3_SD_485

SDMMC_D0

9A

SDMMC_D1

15

VCC

SDMMC_D3

VCC

1 10

C3

100nF

USART2_TX

VDD

14

GN

D

DAT2_Ex

1

6

DAT

1

DAT2_In3

GND

SD Card

RS485

SB24 NC

Card Removed --> CLOSECard Inserted --> OPEN

DETGNDB

5

9B3

DEB

CD

/DAT

3D

AT2

J1

NC

1

5CMD_In

DAT1_Ex

6

3V3_SD_485

SD_DETECT

C28

100nF

SD_DETECT

CLK

9

4

2

DAT3_In

GN

D

DAT

0

8

R24 62

DETCA

2

C4

10uF

5

DETCB

8

1312

4

DAT1_In

VL

RDATA_VCC

CMD_Ex

7

16

R

U19 STR485LVR25 62

SLR

10B

3

D

USART2_RX

DAT0_In

DAT3_Ex

1

9

WP/CD

8A 7

SDMMC_CK

2

3V3_SD_4853V3_SD_485

IMP34DT05

MP23ABS1

DB

4345 - Rev 2

page 8/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Figure 8. STEVAL-STWINKT1B schematic (6 of 7)

A8

DAT0_In

14

7SLR

2

DETGNDB

VDD

4

10B

SB25

12CMD_Ex

13

6GND

STR485LV

DAT

2

6G

ND

10

B9

8

NC

1

3V3_SD_485Micro-SD

3

DAT2_ExVCC

15

3V3_SD_485

RE4

10nF

U1

DAT2_In

2

100nF

WP/CD

8

3V3_SD_485

Card Removed --> CLOSECard Inserted --> OPEN

SDMMC_D2

SDMMC_CK

DAT3_Ex

7

C28

USART2_TX C29

6

SD_DETECT

C3

SD Card

RS485

DE3

CMD_In

4

R2

0R

SDMMC_D1

DETGNDADETCA 9A

CLK

5

100nF

R24 62

DAT1_In9

CD

/DAT

31

U19

17

11CLK_Ex

D5

11VCC

9B

10uF

3V3_SD_485

EP62

2

SDMMC_D0

DAT

17

DAT

0

SDMMC_D3SDMMC_CMD

VL1

RDAT3_GND

1

DAT0_Ex

GN

D

CLK_In

EMIF06-MSD02N16

5

3C

MD

C4

J1

DETCB 10A

16RDATA_VCC

DAT1_Ex

10

R25

USART2_RTS

SD_DETECT

USART2_RX

NCSB24

DAT3_In

3

SD

DB

4345 - Rev 2

page 9/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Figure 9. STEVAL-STWINKT1B schematic (7 of 7)

9

b1

b3

I2C3_SDA

CS_WIFI BLE_SWDCLK

BLE_CS

100nF

5SDA

1

1

4.7k

5

SPI1_CLK

18DIO1/SPI_CS

2

SPI1_MISO

a4

Male Conn

NCSB15

BLE Current monitoring

R30

USART3_RTS

19

8

SPI1_MOSI

BLE_RST

1

BLE_SPI_MISO

RTC_TAMP1

DCDC_2

VDD_BLE

4

U5

USART3_CTS

47k

BLE_SWDCLK

100nF

SB13 NC

21N

C#2

1

NC#3 7SCL

4.7k

b6

SB4

NCSB16

a3

SO8N

DIO3/SPI_MOSI

SB9 NC

BT_RESET

20

4GND

R31

VDD_BLE

WIFI_WAKEUP

14

VDD_WIFI

RESETVCC

2

BLE_SWDIO

WIFI_BOOT0

ADC IN2

BLE_INT

SB21 0R

0RSB18

3

SB20 0R

BLE_TEST8 ADC IN1

1

STSAFE-A110

8

0R

DIOA12

USART3_TX

13

3NC#1

NC

SPI2_MOSI

NC

SPI1_MOSI

STRIP254P-M-5-90-SMD

SB6 0R

WIFI_DRDY

SPI1_MISO

C33

USART3_RX

BLE_SWDIO

SB3 NC

15

1

Default ON

Default OFF

Default ON

Default OFF

M55-7001242R

BLE_SPI_MOSISPI2_MISO

BLE_SPI_SCK

VDD_WIFI

SB8 0R

5

DIO4/I2C_CLK

2

a2 b2

USART2_TX

R27

2

DIO0/SPI_CLK

16

I2C3_SCL

DIO

14/A

NAT

EST0

DIO

7/BO

OT/

UAR

T_C

TSG

ND

DIO

6/U

ART_

RTS

DIO

8/U

ART_

TXD

DIO

11/U

ART_

RXD

DIO

9/TC

K/SW

TCK

DIO

10/T

MS/

SWTD

IAN

ATES

T1

6NC#2

I2C3_SCL

I2C3_SCL

VBLUE

4 17BLE_TEST9

DCDC_2

WIFI_RSTI2C3_SDA

J8

NCSB14

Wi-Fi Current monitoring

SB5 0R

10

BLE_SPI_MOSI

I2C3_SDA

SB2

SB7 NC

SPI1_CLK

a1

4.7k

R26

b4a5

DCDC_2

DCDC_1

U7

11 12

SPI2_CLK

DIO5/I2C_SDA

3

C53

BLE

WIFI

STSAFE-A100

TAMPER

SB1

BLE_INT

a6

STSAFE_RESET

J10

BLE_SPI_MISO

7

USART2_RX

NC

#22

22

CN3

VDD_BLE

VDD_BLE

BLE_SPI_SCK

b5

BLE_SPI_CS

SB19 0R

23N

C#2

3

BlueNRG-M2SA

DIO2/SPI_MISO

6

BLE_RST

J9

BLE_CS

2

DB

4345 - Rev 2

page 10/12

STEVAL-STW

INK

T1BSchem

atic diagrams

Revision history

Table 1. Document revision history

Date Version Changes

16-Nov-2020 1 Initial release.

15-Dec-2020 2 Updated cover page features and description.

STEVAL-STWINKT1B

DB4345 - Rev 2 page 11/12

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STEVAL-STWINKT1B

DB4345 - Rev 2 page 12/12