RL78/F13, F14 CHAPTER 15 SERIAL ARRAY UNIT
R01UH0368EJ0210 Rev.2.10 931
Dec 10, 2015
(2) Operation procedure
Figure 15-99. Initial Setting Procedure for Slave Transmission
Release the serial array unit from the reset status and
start clock supply.
Setting the PER0 register
Starting initial setting
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
Starting communication
Set the operation clock.
Set an operation mode, etc.
Set a communication format.
Set bits 15 to 9 to any value for baud rate setting.
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.
Set the SSmn bit of the target channel to 1
and set
the SEmn bit to 1 (to enable operation).
Set transmit data to the SDRmn register and wait for
a clock from the master.
Writing to the SSEm register
Set the SSEm bit of the target channel to 1 to enable
operation of slave select input function for the target
channel.
Remark m: Unit number (m = 0, 1), n: Channel number (n = 0, 1), p: CSI number (p = 00, 01, 10, 11),
mn = 00, 01, 10, 11
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