Renesas rl78 User Manual

 

RL78/G1A 

 

CHAPTER  12   SERIAL  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

510  

Jul 04, 2013 

 

(Essential) 

Yes 

No

Wait until stop the communication target 

or communication operation completed 

Completing master 

preparations? 

Port manipulation 

Changing setting of the SPSm register

Changing setting of the SDRmn 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 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 

data (SOmn). 

Enable data 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 and set 

the SEmn bit to 1 (to enable operation). 

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.

(Selective) 

(Selective) 

(Selective) 

Changing setting of the SOEm register

Set the SOEmn bit to 1 and enable 

output. 

Changing setting of the SOEm register

Clear the SOEmn bit to 0 and stop 

output. 

(Selective) 

Changing setting of the SCRmn register

Re-set the register to change the serial 

communication operation setting register 

mn (SCRmn) setting. 

Changing setting of the SOLm register

Re-set the register to change serial 

output level register m (SOLm) setting. 

Starting setting for resumption

(Essential) 

(Essential) 

(Essential) 

(Selective) 

(Selective) 

(Selective) 

(Selective) 

 

 

Remarks 1.  If PER0 is rewritten while stopping the master transmission and the clock supply is stopped, wait 

until the transmission target stops or transmission finishes, and then perform initialization instead of 

restarting the transmission. 

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

mn = 00, 02, 10 

 

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