AT04357 RCB256RFR2-XPRO User Guide [USER GUIDE]
TBDA-MCU-09/2013
12
Pin number
Name
Description
9
IRQ/GPIO
Interrupt request line and/or general purpose IO.
10
SPI_SS_B/GPIO
Slave select for SPI and/or general purpose IO.
11
TWI_SDA
Data line for two wire interface. Always implemented, bus
type.
12
TWI_SCL
Clock line for two wire interface. Always implemented, bus
type.
13
USART_RX
Receiver line of Universal Synchronous and Asynchronous
serial Receiver and Transmitter
14
USART_TX
Transmitter line of Universal Synchronous and
Asynchronous serial Receiver and Transmitter
15
SPI_SS_A
Slave select for SPI. Should be unique if possible.
16
SPI_MOSI
Master out slave in line of Serial peripheral interface. Always
implemented, bus type
17
SPI_MISO
Master in slave out line of Serial peripheral interface. Always
implemented, bus type
18
SPI_SCK
Clock for Serial peripheral interface. Always implemented,
bus type
19
GND
Ground
20
VCC
Power for extension board
