User Manual

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Document ID: PB-ZB-MOD-003-20DS
5.2 MODULE PAD DESCRIPTION
The following table describes the pads of the module.
Table 5.1: Pad Description
Pad#
Signal
Direction
Description
1
GND
Power
Ground supply pad
2
GND
Power
Ground supply pad
3
VCC
Power
Power supply pad
4
VCC
Power
Power supply pad
5
nRESET
I
Active low chip reset (internal pull-up)
6
PC5
I/O
Digital I/O
TX_ACTIVE
O
Logic-level control for external Rx/Tx switch. The STM32W108 baseband
controls TX_ACTIVE and drives it high (VDD_PADS) when in Tx mode.
Select alternate output function with GPIO_PCCFGH[7:4]
7
PC6
I/O
Digital I/O
OSC32B
I/O
32.768 kHz crystal oscillator.
Select analogue function with GPIO_PCCFGH[11 :8]
nTX_ACTIVE
O
Inverted TX_ACTIVE signal (see PC5)
Select alternate output function with GPIO_PCCFGH[11:8]
8
PC7
I/O
Digital I/O
OSC32A
I/O
32.768 kHz crystal oscillator.
Select analogue function with GPIO_PCCFGH[15:12]
OSC32_EXT
I
Digital 32 kHz clock input source
9
PA7
I/O High current
Digital I/O Disable REG_EN with GPIO_DBGCFG[4]
TIM1CH4
O
Timer 1 Channel 4 output
Enable timer output with TIM1_CCER
Select alternate output function with GPIO_PACFGH[15:12]
Disable REG_EN with GPIO_DBGCFG[4]
I
Timer 1 Channel 4 input. Cannot be remapped
REG_EN
O
External regulator open drain output. (Enabled after reset).
10
PB3
I/O
Digital I/O
TIM2_CH3 (see
also Pad 13)
O
Timer 2 channel 3 output
Enable remap with TIM2_OR[6]
Enable timer output in TIM2_CCER
Select alternate output function with GPIO_PBCFGL[15:12]
I
Timer 2 channel 3 input Enable remap with TIM2_OR[6]
UART_CTS
I
UART CTS handshake of Serial Controller 1
Enable with SC1_UARTCFG[5]
Select UART with SC1_MODE
SC1SCLK
O
SPI master clock of Serial Controller 1 Either disable timer output in
TIM2_CCER, or disable remap with TIM2_OR[6] Enable master with
SC1_SPICFG[4] Select SPI with SC1_MODE
Select alternate output function with GPIO_PBCFGL[15:12]
I
SPI slave clock of Serial Controller 1
Enable slave with SC1_SPICFG[4]
Select SPI with SC1_MODE