Renesas RL78/G15

RL78/G15 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0959EJ0110 Rev.1.10 Page 488 of 765
Mar 7, 2023
(2) Operation procedure
Figure 12-86. Initial Setting Procedure for Simplified I
2
C Address Field Transmission
Release the serial array unit from the reset state, and
start clock supply to the serial array unit.
Starting initial setting
Setting the PER
0
register
Setting the SPSm register
Setting the SMRmn register
Setting the SCRmn register
Setting the SDRmn register
Setting port
Completing initial setting
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
)).
Enable data output,
clock output, and N-ch open-drain output
(
V
DD
tolerance) of the target channel by setting the port
register, port mode register
, and port output mode register.
Setting the SOm register
Set the initial output level (1
) of the serial data (SOmn) and
serial clock (CKOmn).