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RL78/G1A CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00 440
Jul 04, 2013
(2) Operation procedure
Figure 12-25. Initial Setting Procedure for Master Transmission
Set an operation mode, etc.
Starting initial setting
Setting the PER0 register
Setting the SPSm register
Setting the SMRmn register
Setting the SCRmn register
Setting the SDRmn register
Setting the SOm register
Setting of the SOEm register
Setting port
Writing to the SSm register
Completing initial setting
Release the serial array unit from the
reset status and start clock supply.
Set the operation clock.
Set a communication format.
Set the initial output level of the serial
clock (CKOmn) and serial data (SOmn).
Set the SOEmn bit to 1 and enable data
output of the target channel.
Setting a port register and a port mode
register (Enable data output and clock
output of the target channel by)
Setting of SAU is completed.
Write transmit data to the SIOp register
(bits 7 to 0 of the SDRmn register) and
start communication.
Set the SSmn bit of the target channel to 1
(SEmn bit = 1: to enable operation).
Set a transfer baud rate (setting the
transfer clock by dividing the operation
clock (f
MCK
)).
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), p: CSI number (p = 00, 01, 10, 11, 20, 21),
mn = 00 to 03, 10, 11