Renesas RL78 Series User Manual page 492

RL78/G1D
(2) Operation procedure
Starting initial setting
Setting the PER0 register
Setting the SPSm register
Setting the SMRmn register
Setting the SCRmn register
Setting the SDRmn register
Changing setting of the SOLm register
Setting the SOm register
Changing setting of the SOEm register
Writing to the SSm register
Completing initial setting
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
Figure 13-76. Initial Setting Procedure for UART Transmission
Setting port
CHAPTER 13 SERIAL ARRAY UNIT
Release the serial array unit from the
reset status and start clock supply.
Set the operation clock.
Set an operation mode, etc.
Set a communication format.
Set a transfer baud rate (setting the
transfer clock by dividing the operation
clock (f )).
MCK
Set an output data level.
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).
Initial setting is completed.
Set transmit data to the SDRmn[7:0] bits
(TXDq register) (8 bits) or the SDRmn[8:0]
bits (9 bits) and start communication.
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