Specifications

STM32W108HB Port Pin mappings
Chip
Pin
ProcessorPortPin SNAPpyIO

Chip
Pin
ProcessorPortPin SNAPpyIO
1 VDD_VCO 21 PA3,SC2nSSEL,
TRACECLK,TIM2_CH2
3
2 RF_P22 PA4,ADC4,PTI_EN,
TRACEDATA2
4
3 RF_N23 PA5,ADC5,PTI_DATA,
nBOOTMODE,
TRACEDATA3
5
4 VDD_RF24 VDD_PADS
5 RF_TX_ALT_P25 PB1,SC1MISO,
SC1MOSI,SC1SDA,
SC1TXD,TIM2_CH1
9
6 RF_TX_ALT_N26 PB2,SC1MISO,
SC1MOSI,SC1SCL,
SC1RXD,TIM2_CH2
10
7 VDD_IF27 SWCLK,JTCK
8 BIAS_R28 PC2,JTDO,SWO 18
9 VDD_PADSA29 PC3,JTDI
19
10 PC5,TXACTIVE 2130 PC4,JTMS,SWDIO 20
11 nRESET31 PC1,ADC3,SWO,
TRACEDATA0
17
12 VREG_OUT32 VDD_MEM
13 VDD_PADS33 PC0,JRST,IRQD,
TRACEDATA1
16
14 VDD_CORE34 PB7,ADC2,IRQC,
TIM1_CH2
15
15 PB3,TIM2_CH3,
UART_CTS,SC1SCLK
1135 PB6,ADC1,IRQB,
TIM1_CH1
14
16 PB4,TIM2_CH4,
UART_RTS,SC1nSSEL
1236 VDD_CORE
17 PA0,TIM2_CH1,
SC2MOSI
037 VDD_PRE
18 PA1,TIM2_CH3,
SC2SDA,SC2MISO
138 OSCB
19 VDD_PADS39 OSCA 
20 PA2,TIM2_CH4,
SC2SCL,SC2SCLK
240 VDD_24MHZ
SNAP Reference Manual Document Number 600-0007K Page 199 of 202