RL78/G13 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0146EJ0100 Rev.1.00 654
Sep 22, 2011
(2) Operation procedure
Figure 12-86. Initial Setting Procedure for UART Reception
Caution Set the RXEmn bit of SCRmn register to 1, and then be sure to set SSmn to 1 after 4 or more f
CLK
clocks have elapsed.
Figure 12-87. Procedure for Stopping UART Reception
Starting initial setting
Setting the PER0 register
Setting the SPSm register
Setting the SMRmn and SMRmr registers
Setting the SCRmn register
Setting the SDRmn register
Writing to the 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 a transfer baud rate (setting the
transfer clock by dividing the operation
clock (f
MCK)).
Set the SSmn bit of the target channel to 1 and
set the SEmn bit to 1 (to enable operation).
The start bit is detected.
Setting port
Enable data input of the target channel
by setting a port register and a port
mode register.
Starting setting to stop
Setting the STm register
Stopping communication
Write 1 to the STmn bit of the target
channel.
Stop communication in midway.
<R>
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