Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  12   SERIAL  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

462  

Jul 04, 2013 

 

Starting setting for resumption

Changing setting of the SPSm register

Changing setting of the SMRmn register

Changing setting of the SOm register

Port manipulation 

Writing to the SSm register

Completing resumption setting

Disable data output and clock output of 
the target channel by setting a port 
register and a port mode register. 

Re-set the register to change the operation 
clock setting. 

Re-set the register to change the transfer 
baud rate setting (setting the transfer 
clock by dividing the operation clock 
(f

MCK

)). 

Re-set the register to change serial mode 
register mn (SMRmn) setting. 

Set the initial output level of the serial 
clock (CKOmn) and serial data (SOmn). 

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

Set the SSmn bit of the target channel to 1 
(SEmn = 1: to enable operation). 

Sets transmit data to the SIOp register (bits 
7 to 0 of the SDRmn register) and start 
communication. 

(Selective) 

(Essential) 

(Selective) 

(Selective) 

(Selective) 

(Essential) 

(Essential) 

Re-set the register to change serial 
communication operation setting register 
mn (SCRmn) setting. 

(Selective) 

Changing setting of the SCRmn register

Set the SOEmn bit to 1 and enable 
output from the target channel. 

(Selective) 

Changing setting of the SOEm register

Set the SOEmn bit to 0 to stop output 
from the target channel. 

(Selective) 

Changing setting of the SOEm register

Port manipulation 

Changing setting of the SDRmn register

(Essential) 
 

Yes 

No 

Wait until stop the communication target 
(slave) or communication operation 
completed 

Completing slave 

preparations?

 

 

Remark  m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3), p: CSI number (p = 00, 01, 10, 11, 20, 21), 

mn = 00 to 03, 10, 11