User Manual

Module Specification
NO. AT357A
TITLE:
Module, ZigBee, 17.9 x 24.9 x 2.75mm, 51 I/O, Edge Castellated, SMD
REVISION DATE: 22 May 2013 ISSUE: O PAGE: 22 of 29
4.6 GPIO ports (default setting)
Below listed the default setting of all 24 multi-purpose GPIO ports.
Ports
Assignment
Logic Level
Peripheral
PA0
SPI bus
MOSI
PA1
SPI bus
MISO
PA2
SPI bus
SCLK
PA3
Digital out
Active Low
nSSEL (slave SPI only)
PA4
Digital out
Active High
PA5
Digital input
Active Low
Bootloader
PA6
Digital out
Active Low
PA7
Digital out
Active Low
PB0
Digital out
Active High
PB1
TxD
UART
PB2
RxD
UART
PB3
nCTS
UART
PB4
nRTS
UART
PB5
ADC Input
Analog
PB6
Digital input
Active Low
PB7
Digital out
Analog
PC0
JTAG
nJRST
PC1
ADC Input
Analog
PC2
JTAG
JTDO
PC3
JTAG
JTDI
PC4
JTAG
JTMS
PC5
Digital out
Active Low
PC6
Digital input
Active Low
PC7
Digital out
Active Low
Table 12: GPIO Ports