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RL78/G1A CHAPTER 12 SERIAL ARRAY UNIT
R01UH0305EJ0200 Rev.2.00 470
Jul 04, 2013
(2) Operation procedure
Figure 12-49. Initial Setting Procedure for Slave 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
Changing 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
data (SOmn).
Set the SOEmn bit to 1 and enable data
output of the target channel.
Enable data output of the target channel
by setting a port register and a port mode
register.
Initial setting is completed.
Set transmit data to the SIOp register (bits
7 to 0 of the SDRmn register) and wait for
a clock from the master.
Set the SSmn bit of the target channel to 1
(SEmn bit = 1: to enable operation).
Set bits 15 to 9 to 0000000B for baud rate
setting.
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