UPD78F1502AGK-GAK-AX Datasheet, PDF (552/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
(2) Operation procedure
Figure 14-77. Initial Setting Procedure for UART Reception
Starting initial setting
Setting PER0 register
Setting SPSm register
Release the serial array unit from the
reset status and start clock supply.
Set the prescaler.
Setting SMRmn and SMRmr registers
Set an operation mode, etc.
Setting SCRmn register
Set a communication format.
Setting SDRmn register
Writing to SSm register
Starting communication
Set a transfer baud rate.
Set the SSmn bit of the target channel to
1 to set SEmn = 1.
The start bit is detected.
Caution After setting the SAUmEN to 1, be sure to set the SPSm register after 4 or more clocks have
elapsed.
Figure 14-78. Procedure for Stopping UART Reception
Starting setting to stop
Setting STm register
Stopping communication
Write 1 to the STmn bit of the target
channel.
Stop communication in midway.
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011