Renesas rl78 Manuel D’Utilisation

 

RL78/G1A 

 

CHAPTER  12   SERIAL  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

518  

Jul 04, 2013 

 

 

 

Starting setting to stop

Stop setting is completed

Write 1 to the STmn bit of the target channel. 

(SEmn = 0: to operation stop status) 

The master transmission is stopped.     

Go to the next processing. 

Writing the STm register

TSFmn = 0? 

If there is any data being transferred, wait for 

their completion. 

(If there is an urgent must stop, do not wait) 

Yes 

No 

Reset the serial array unit by stopping the 

clock supply to it. 

Setting the PER0 register

(Essential) 

(Selective) 

(Selective) 

 

Remark  m: Unit number (m = 0, 1), n: Channel number (n = 1, 3), mn = 01, 03, 11 

r: Channel number (r = n 

− 1) 

 

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 

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 SSmn bit of the target channel to 1 and 
set the SEmn bit to 1 (to enable operation).  
Become wait for start bit detection. 

Setting port 

Enable data input of the target channel 
by setting a port register and a port 
mode register. 

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