FRDM-KW36 Minimum BoM Development Board User’s GuideFigure 11. KW36 Minimum BoM Board 32.786 kHz oscillator circuit • 32.768 kHz Crystal Oscillator (for accurate low-power time

© 2018 NXP B.V.

FRDM-KW36 Minimum BoM Development

Board User’s Guide

1. Introduction

This guide describes the hardware of KW36 Minimum Bill

of Material development board (reference X-UBluetooth

LEKWZ0-31417). The board is configurable, low-power,

and cost-effective. It is an evaluation and development

board for application prototyping and demonstration of the

KW36A/35A and KW36Z/35Z family of devices.

The KW36 is an ultra-low-power, highly integrated single-

chip device that enables Bluetooth® Low Energy

(Bluetooth LE) or Generic FSK (at 250, 500 and 1000

kbps) for portable, extremely low-power embedded

systems.

The KW36 integrates a radio transceiver operating in

2.36 GHz to 2.48 GHz range supporting a range of GFSK,

an Arm® Cortex®-M0+ CPU, up to 512 KB Flash and up

to 64 KB SRAM. Bluetooth LE Link Layer hardware and

peripherals optimized to meet the requirements of the target

applications.

KW36 device is also available on the FRDM-KW36

Freedom Development Board. For more information about

the FRDM-KW36 Freedom Development Board, see the

NXP Semiconductor Document Number: MiniBoMKW36UG

User’s Guide Rev. 0 , 09/20187

Contents

1. Introduction ....................................................................... 1 2 Overview and description .................................................. 2

2.1 Overview .................................................................2 2.2 Feature description ..................................................3

3 Functional description........................................................ 5 3.1 Block diagram .........................................................5 3.2 Generic application schematic .................................6 3.3 RF Circuit ................................................................9 3.4 Clocks ......................................................................9 3.5 Power management ................................................ 10 3.6 User Application LEDs .......................................... 15

4 I/O .................................................................................... 16 4.1 I/O pin accessibility ............................................... 16

5 Schematic......................................................................... 18 6 Layout .............................................................................. 19 7 PCB ................................................................................. 20 8 Mounted PCB .................................................................. 20 9 Component positioning .................................................... 21 10 Bill of material ................................................................. 23

Buck mode ............................................................. 23 Bypass mode .......................................................... 25

11 References ....................................................................... 27 12 Revision history ............................................................... 27

Overview and description

FRDM-KW36 Minimum BoM Development Board User’s Guide, User’s Guide, Rev. 0, 09/20187

2 NXP Semiconductos.

FRDM-KW36 Freedom Development Board User's Guide (document FRDMKW36ZUG). Find the

schematic and design files at this link (NXP web page).

2 Overview and description

The KW36 minimum BoM development board is an evaluation environment supporting NXP

KW35Z/36Z/35A/36A (KW36) Wireless Microcontrollers (MCU). The KW36 integrates a radio

transceiver operating in the 2.4 GHz band (supporting a range of GFSK and Bluetooth LE) and an Arm

Cortex-M0+ MCU into a single package. NXP supports the KW36 with tools and software that include

hardware evaluation and development boards, software development IDE, applications, drivers, and a

custom PHY with a Bluetooth LE Link Layer. The KW36 minimum BoM development board (31417)

consists of the KW36Z device with a 32 MHz reference oscillator crystal, RF circuitry (including antenna),

supplied with a coin cell CR2032 or an external power supply. The board is a standalone PCB and supports

application development with NXP’s Bluetooth Low Energy and Generic FSK libraries.

2.1 Overview

Figure 1 is a high-level block diagram of the KW36 Minimum BoM board (X-UBluetooth LEKWZ0-

31417) features:

Figure 1. KW36 Minimum BoM board block diagram

https://www.nxp.com/docs/en/user-guide/FRDMKW36UG.PDF

https://www.nxp.com/products/processors-and-microcontrollers/arm-based-processors-and-mcus/kinetis-cortex-m-mcus/w-serieswireless-conn.m0-plus-m4/frdm-kw36-freedom-development-kit-for-kinetis-kw36-35-mcus:FRDM-KW36?tab=Design_Tools_Tab



NXP Semiconductors 3

2.2 Feature description

The KW36 Minimum BoM development board is based on TPMS development platform. It is the most

diverse reference design containing the KW36Z device and all necessary I/O connections to use as a stand-

alone board. Figure 2 shows the KW36 Minimum BoM development board.

Figure 2. KW36 Minimum BoM development board

The KW36 Minimum BoM development board includes following features:

• NXP’s ultra-low-power KW36Z Wireless MCU supporting Bluetooth LE and Generic FSK

• Reference design area with small-footprint, low-cost RF node:

o Single-ended input/output port

o Very low count of external components (minimum BoM)

• Ceramic antenna

• Selectable power sources (coin cell or external output power)

• DC-DC converter with Buck, and Bypass operation modes

• 32 MHz reference oscillator for RF operation

• 32.768 kHz reference oscillator mainly use for RTC operation and RF low-power operation

• 2.4 GHz frequency operation (ISM and MBAN)

• Coin cell connector to be able to work using a CR2032 coin cell

• Cortex 10-pin (0.05) SWD debug port for target MCU

• 1x6 Connector 6-pin UART port

• Three orange LED indicator for power and communication

• 20 available GPIOs




Figure 3 shows the main board features and Input/Output headers for the KW36 Minimum BoM board:

Figure 3. KW36 Minimum BoM board component placement

Functional description



3 Functional description

The four-layer board provides the KW36 with its required RF circuitry, 32 MHz reference oscillator

crystal, and power supply with a DC-DC converter including Bypass and Buck (default) modes. The

layout for this base-level functionality can be used as a reference layout for your target board.

3.1 Block diagram

Figure 4. Block diagram (Buck mode)

Figure 5. Block diagram (Bypass mode)




3.2 Generic application schematic

3.2.1 Buck mode (auto-start)

Figure 6. Buck mode (auto start)




3.2.2 Buck mode (manual-start)

Figure 7. Buck mode (manual start)




3.2.3 Bypass mode

Figure 8. Bypass mode




3.3 RF Circuit

The KW36 Minimum BoM board RF circuit provides an RF interface for users to begin application

development. A minimum matching network to the MCU antenna pin is provided through C17 and L8.

Those two components match to the ceramic antenna through a 50 ohms controlled line. An additional

and optional matching component (R112 footprint), is provided to better filter harmonics.

Figure 9. KW36 Minimum BoM board RF circuit

3.4 Clocks

The KW36 Minimum BoM board provides two clocks. One 32 MHz for clocking MCU and Radio, and

a 32.768 kHz to provide an accurate low-power time base.

Figure 10. KW36 minimum BoM board 32 MHz reference oscillator circuit




• 32 MHz Reference Oscillator

o Figure 10 shows the 32 MHz external crystal Y3. The KW36Z requires the frequency to

be accurate less than 10 ppm. For more details, please refer to the device datasheet.

o Internal load capacitors provide the crystal load capacitance. The internal load capacitor

is adjustable which allows the center frequency of the crystal to be tuned.

o To measure the 32 MHz oscillator frequency, program the CLKOUT (PTB0) signal to

provide buffered output clock signal (TP29).

Figure 11. KW36 Minimum BoM Board 32.786 kHz oscillator circuit

• 32.768 kHz Crystal Oscillator (for accurate low-power time base)

o A secondary 32.768 kHz crystal QZ1 is provided (see Figure 6)

o Internal load capacitors provide the entire crystal load capacitance

3.5 Power management

There are two different ways to power the KW36 Minimum BoM board. The KW36 Minimum BoM

board power-management circuit is shown in Figure 12:




Figure 12. KW36 Minimum BoM Board power management circuit.

The KW36 Minimum BoM Board can be powered by the following means:

• From an external battery (Coin-cell – CR2032). Use jumper J4 pins 1-2 or solder R234.

• From an external DC supply in the following ways:

o Connect two wires: a wire that can supply 1.71 to 3.6 VDC (BT1-1) and another wire to

the ground (BT1-2) in bypass mode. By default, KW36 DC-DC is configured in buck

mode, then, the voltage should be in the range of 2.1 V to 3.6 V.

Orange LED marked as D4 is available as a power indicator.

The KW36 Minimum BoM Board can be configured to use either of the DCDC converter operating

modes (default). These modes are Bypass or Buck (default). Moving the configuration from buck

(default) to bypass mode need to modify some components:

Table 1. : Buck or bypass mode table

Buck mode Bypass mode Figure

R1 x - 10

R2 - x 10

R3 - x 10

R4 x - 10

R5 - x 9

R6 x - 9

R7 - x 10

R9 x x 8

R10 - - 8

L3 x - 8




NOTE

x (populated component), - not populated component

Figure 13. Component configuration for Buck or Bypass mode – DCDC_CFG pin

Figure 14. Component configuration for Buck or Bypass mode – PSWITCH pin




Figure 15. Component configuration for Buck or Bypass mode – supply pins

DCDC mode jumper configurations are described in Figure 16.

Figure 16. DCDC configurations.




VREFH/VREF_OUT

Circuit for VREF_OUT VREF_OUT provides a 1.2V reference voltage that can be used as VREFH for ADC.

Figure 17. Circuit for VREF_OUT

Circuit for VREFH VREFH is the high reference voltage for the ADC, in this circuit it will have the same values as VDDA (Analog supply voltage).

Figure 18. Circuit for VREFH




3.6 User Application LEDs

The KW36 Minimum BoM Board provides an orange LED for user applications. Figure 19 shows the

circuitry for the application controlled LEDs.

- LED_COM1: SCL

- LED_COM2: SDA

- LED_COM3: RF active

Figure 19. KW36 Minimum BoM Board Orange LED circuit.

NOTE

When operating in default Buck configuration, the MCU would be

operating at 1.8 V, which means that GPIO would be operating at 1.8 V.

I/O



4 I/O

4.1 I/O pin accessibility

Figure 20 shows the I/O pinout (TPx). Each I/O pin has its own ground to facilitate the 2 wires

connection on the PCB.

Figure 20. KW36 Minimum BoM Board I/O pinout

I/O



Table 2 shows the signals that can be multiplexed to each pin.

Table 2. Test point description

TPx Test Point (TPx)- Description IC

Pin TP20 PTA16/LLWU_P4/SPI1_SOUT/UART1_RTS_b/TPM0_CH0 4

TP21 PTC18/LLWU_P2/SPI0_IN/I2C1_SDA/UART0_TX/BSM_DATA/DTM_TX/UART1_TX 47

TP22 PTC17/LLWU_P1/RF_EXT_OSC_EN/SPI0_SOUT/I2C1_SCL/UART0_RX/BSM_FRAME/DTM_RX/UART1_RX 46

TP23 PTC19/LLWU_P3/RF_EARLY_WARNING/SPI0_PCS0/I2C0_SCL/UART0_CTS_b/BSM_CLK/UART1_CTS_b 48

TP25 PTC16/LLWU_P0/SPI0_SCK/I2C0_SDA/UART0_RTS_b/TPM0_CH3/UART1_RTS_b 45

TP26 PTC1/DIAG1/RF_EARLY_WARNING/ANT_B/I2C0_SDA/UART0_RTS_b/TPM0_CH2/SPI1_SCK/BSM_CLK 37

TP27 PTC2/LLWU_P10/TSI0_CH14/DIAG1/TX_SWITCH/I2C1_SCL/UART0_RX/CMT_IRO/DTEST6/DTM_RX 38

TP28 PTC3/DIAG3/LLWU_P11/RX_SWITCH/I2C1_SDA/UART0_TX/TPM0_CH1/DTM_TX/SPI1_SIN/CAN0_TX 39

TP29 PTB0/LLWU_P8/RF_RFOSC_EN/RF_DFT_RESET/I2C0_SCL/CMP0_OUT/TPM0_CH1/CLKOUT/CAN0_TX 16

TP30 PTB1/ADC0_SE1/CMP0_IN5/RF_PRIORITY/DTM_RX/I2C0_SDA/LPTMR0_ALT1/TPM0_CH2/CMT_IRO/CAN0_RX 17

TP31 PTC4/DIAG4/RF_ACTIVE/LLWU_P12/ANT_A/EXTRG_IN/UART0_CTS_b/TPM1_CH0/BSM_DATA/SPI1_PCS0/CAN0_RX 40

TP32 PTC5/LLWU_P13/RF_RF_OFF/ LPTMR0_ALT2/UART0_RTS_b/TPM1_CH1/BSM_CLK 41

TP34 PTA17/LLWU_P5/RF_DFT_RESET/SPI1_SIN/UART1_RX/CAN0_TX/TPM_CLKIN1 5

TP35 PTA18/LLWU_P6/SPI1_SCK/ UART1_TX/CAN0_RX/TPM2_CH0 6

TP36 PTA19/ADC0_SE5/LLWU_P7/SPI1_PSC0/UART1_CTS_b/TMP2_CH1 7

TP37 PTB2/ADC0_SE3/CMP0_IN3/RF_OFF/TPM1_CH0/DTEST13/DCDC_TESTO5 18

TP38 PTB3/ADC0_SE2/CMP0_IN4/CLKOUT/TPM1_CH1/DTEST9/RTC_CLKOUT/ERCLK32K 19

TP42 PTB18/DAC0_OUT/ADC0_SE4/CMP0_IN2/I2C1_CLK/TPM_CLKIN0/TPM0_CH0/DTEST8/NMI 23

TP46 ADC0_DP0/CMP0_IN0 24

TP47 ADC0_DP0/CMP0_IN1 25

Table 3. UART connector pinout (JP3)

HDR Pin 1x6 Connector (JP3) - Description IC Pin

1 GND -

2 FTDI cable CTS / PTC5 41

3 FTDI cable VCC / VBAT_PWR -

4 FTDI cable TXD / UART0_RX 42

5 FTDI cable RXD / UART0_TX 43

6 FTDI cable RTS / PTC4 40

Table 4. SWD connector pinout (J14)

HDR Pin 2x5 Connector (J14) - Description IC Pin

1 VDD_1P8F -

2 PTA0_SWD_DIO 1

3 GND -

4 PTA1_SWD_CLK 2

5 GND -

6 NC -

7 NC -

8 NC -

9 NC -

10 RST_TGTMCU_b 3

Schematic



5 Schematic

Layout



6 Layout

Figure 21. Layout

Mounted PCB



7 PCB

Figure 22. PCB

8 Mounted PCB

Figure 23. Mounted PCB

Component positioning



9 Component positioning

Figure 24. Component positioning 1

Component positioning



Figure 25. Component positioning 2

Bill of material



10 Bill of material

Buck mode

Table 5. Minimum BoM list for any application board in buck mode

Designator Value Manufacturer Part Number Purpose

L8 4.7nH Coilcraft 0402HP-4N7XGE RF Matching*

L1 100nH Murata LQW15ANR10J00D DC filtering

L3 10µH TDK VLS4012ET-100M DC-DC Inductor

L2 100nH Murata LQW15ANR10J00D DC filtering

C21 3pF Murata GRM1555C1H3R0CZ01D Decoupling Caps***




C1 12pF Murata GRM1555C1H120JZ01D Decoupling Caps


C17 0.8pF Murata GRM1555C1HR80WA01D RF Matching*

C18 0.8pF Murata GRM1555C1HR80WA01D RF Matching*

C7 10µF TAIYO YUDEN EMK107BBJ106MA-T

C4 0.1µF KEMET C0402C104K8PAC Decoupling Caps

C10 10µF TAIYO YUDEN EMK107BBJ106MA-T Decoupling Caps


C12 10µF TAIYO YUDEN EMK107BBJ106MA-T Decoupling Caps

C9 0.1µF KEMET C0402C104K8PAC DC filtering

C8 1µF Murata GRM188R61H105KAALD DC filtering

R20 100KΩ

YAGEO AMERICA RC0402FR-07102KL Pswitch pull-down

(manual start only)

Y3 32MHz NDK EXS00A-CS07637 Main clock**

QZ1 32KHz EPSON ELECTRONICS FC-135 32.7680KA-A3 RTC clock

Bill of material



* FRDM-KW41Z matching

** Refer to chapter 3.4 Clocks for alternate crystal frequencies and PNs

*** Add the decoupling capacitor if the associated pin is used into the application

Table 6. Minimum BoM list for 31417 application board in buck mode

BOM.Qty Commodity BOM.Ref Des Values

List of components only used for the minimum BoM board 31417

18 Resistor R160,R161,R174,R176,R204,R212,R213,R214,R215, R216,R218,R219,R220,R221,R222,R226,R232,R233

0 ohm

1 Through-Hole J4 connector

1 Capacitor C2 12pF

2 Capacitor C6,C55 0.1uF

1 Capacitor C19 10uF

1 Capacitor C70 1.5pF

1 Capacitor C11 1uF

1 Inductor L4 1nH

1 Resistor R1 (buck) 0 ohm

3 Resistor R4,R6(buck), R9 0 ohm

4 Resistor R132,R133,R230,R231 4.7K

1 Connector JP3 FTDI connector

1 Header J14 SWD connector

1 ceramic antenna E1 ceramic antenna

1 Bracket, Strap, Clamp BT1- CR2450 Coin cell support

DNP LED D2, D3, D4 Leds

DNP Resistor R64, R120, R121 1K

DNP Resistor R5(buck), R10 ohm

DNP Resistor R2 (buck) ohm



DNP Resistor R67,R68,R112,R119,R183, R234 ohm

DNP Resistor R98,R99,R134 10K

DNP=Do Not Populate

Bill of material



Bypass mode

Table 7. Minimum BoM list for any application board in bypass mode

Designator Value Manufacturer Part Number Purpose

L8 4.7nH Coilcraft 0402HP-4N7XGE RF Matching*







C17 0.8pF MURATA GRM1555C1HR80WA01D RF Matching*

C18 0.8pF MURATA GRM1555C1HR80WA01D DNP RF Matching*

C12 10µF TAIYO YUDEN EMK107BBJ106MA-T





C9 0.1µF KEMET C0402C104K8PAC DC filtering

C19 10µF TAIYO YUDEN EMK107BBJ106MA-T Power supply bulk cap

C28 10µF TAIYO YUDEN EMK107BBJ106MA-T Power supply bulk cap

Y3 32MHz NDK EXS00A-CS07637 Main clock**

QZ1 32KHz EPSON

ELECTRONICS FC-135 32.7680KA-A3 RTC clock

* FRDM-KW35/36/A/Z matching

** Refer to chapter 3.4 Clocks for alternate crystal frequencies and PNs

*** Add the decoupling capacitor if the associated pin is used into the application

Bill of material



Table 8. Minimum BoM list for 31417 application board in bypass mode

BOM.Qty Commodity BOM.Ref Des Values

List of components only used for the minimum BoM board 31417

18 Resistor R9, R160,R161,R174,R176,R204,R212,R213,R214,R215, R216,R218,R219,R220,R221,R222,R226,R232,R233

0 ohm

3 Resistor R5 (bypass) 0 ohm




4 Resistor R132,R133,R230,R231 4.7K

1 Connector JP3 FTDI connector

1 Header J14 SWD connector

1 ceramic antenna E1 ceramic antenna

1 Bracket, Strap, Clamp BT1- CR2450 Coin cell support

1 Connector J4 battery connector

1 Capacitor C2 12pF

1 Capacitor C6,C7,C55 0.1uF

1 Capacitor C70 1.5pF

1 Capacitor C11 1uF

1 Inductor L4 1nH

DNP Inductor L3 (bypass) 10uH

DNP Resistor R1 (bypass) 0 ohm

DNP Resistor R4,R6 (bypass) 0 ohm


DNP LED D2,D3,D4 Leds

DNP Resistor R10, R67,R68,R112,R119,R183, R234 0 ohm


DNP=Do Not Populate

mailto:10uH@1

Revision history



11 References

The following references are available on KW36 Minimum BoM Board:

• KW36 Minimum BoM Board Design Package

12 Revision history

Rev. Date Substantive change(s)

0 09/2018 Initial revision.

http://www.nxp.com/FRDM-KW36

Document Number: MiniBoMKW36UG Rev. 0

09/20187

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Documents

FRDM-KW36 Minimum BoM Development Board User’s GuideFigure 11. KW36 Minimum BoM Board 32.786 kHz oscillator circuit • 32.768 kHz Crystal Oscillator (for accurate low-power time