CMS32L051 User Manual |Chapter 12 Universal Serial Communication Unit
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(2) Operation Steps
Figure 12-62 Initial setup steps for slave send and receive
initial configuration starts
configure PER0 register
configure SPSm register
configure SMRmn register
configure SCRmn register
configure SDRmn register
configure SOm register
Modifing SOEm register
configuration
configure port
write SSm register
initial configuration completes
release universal serial communication unit
from reset state, start providing clock.
configure operational clock
configure operational mode..etc.
configure communication format
set baud rate (bit15~9) to "0000000B"
configure serial data (Somn) initial output
voltage
set SOEmn bit to 1, enable data output of
target channel
via Configure port register and port mode
register, set data output of target channel to
valid.
set SSmn bit of target channel to "1": set to
enable operation state).
complete initial configuration.
If transmit data to SIOp register (bit 7~0 of SDRmn
register), wait for master device clock.
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