Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  12   SERIAL  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

508  

Jul 04, 2013 

 

 

Remark  m: Unit number (m = 0, 1), n: Channel number (n = 0, 2), q: UART number (q = 0 to 2) 

 

mn = 00, 02, 10 

 

 

<R> 

Starting initial setting 

Setting the PER0 register 

Setting the SPSm register 

Setting the SMRmn register 

Setting the SCRmn register 

Setting the SDRmn register 

Setting the SOm register 

Setting port 

Changing setting of the SOEm register 

Writing to the SSm register 

Completing initial setting 

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 initial output level of the serial 

data (SOmn). 

Enable data output of the target channel 

by setting a port register and a port mode 

register. 

Set the SOEmn bit to 1 and enable data 

output of the target channel. 

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.

Changing setting of the SOLm register 

Set an output data level.