RL78/D1A User's Manual: Hardware - Renesas

Under development
Preliminary document
Specifications in this document are tentative and subject to change.
RL78/D1A CHAPTER 12 SERIAL ARRAY UNIT
(2) Operation procedure
Figure 12-58. Initial Setting Procedure for Slave Reception
Starting initial settings
Setting PER0 register
Setting SPSm register
Setting SMRmn register
Setting SCRmn register
Setting SDRmn register
Setting port
Writing to SSm register
Starting communication
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 bits 15 to 9 to any value for setting
the baud rate.
Enable data input and clock input of the
target channel by setting a port register
and a port mode register.
Set the SSmn bit of the target channel to
1 to set SEmn = 1.
Wait for a clock from the master.
Cautions After setting the PER0 register to 1, be sure to set the SPSm register after 4 or more clocks
have elapsed.
Figure 12-59. Procedure for Stopping Slave Reception
Starting setting to stop
Setting STm register
Stopping communication
Write 1 to the STmn bit of the target
channel.
Stop communication in midway.
R01UH0317EJ0004 Rev. 0.04 632
Feb. 22, 2013