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: 18 of 29
4.2 Serial Communication
AT357A module provides several options for serial communications.
• SPI (Serial Peripheral Interface)
SPI(Slave) Pin
Module Pin Number
GPIO Port
SC2MOSI
16
PA0
SC2MISO
17
PA1
SC2SCKL
18
PA2
SC2nSSEL
21
PA3
Table 8: SPI Pins
Figure 12a. Host uC to AT357A module via SPI Interface
Figure 12b. AT357A module to external SPI device
AT
357
A
nRESET
PA0
PA1
PA2
PA3
E
xt SPI Device
nRESET
MOSI
MISO
SCK
Chip select
Host uC
GPIO
MOSI
MISO
SCK
CS
AT357A
nRESET
PA0
PA1
PA2
PA3