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RL78/G1A 

 

CHAPTER  12   SERIAL  ARRAY  UNIT 

R01UH0305EJ0200  Rev.2.00 

 

 

552  

Jul 04, 2013 

 

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

mn = 00 to 03, 10, 11 

 

For the initial setting, see Figure 12-105. 

No 

Yes 

Yes 

Communication error 

processing 

To data transmission flow 

and data reception flow 

Writing 0 to the SOmn bit 

Address field 

transmission completed

Transfer end interrupt 

generated?

Writing address and R/W 

data to SIOr (SDRmn[7:0])

Writing 1 to the SSmn bit 

Responded ACK? 

Writing 1 to the SOEmn bit

Writing 0 to the CKOmn bit

Default setting 

Wait 

No 

Transmitting address field

Wait for address field transmission 

complete. 

(Clear the interrupt request flag) 

Transmitting address field

To serial operation enable status 

Enable serial output

Prepare to communicate the SCL signal is 

fall 

To secure a hold time of SCL signal 

Start condition generate

Setting 0 of the SOmn bit

ACK response from the slave 

will be confirmed in PEFmn bit.  

if ACK (PEFmn = 0), to the next 

processing, if NACK (PEFmn = 

1) to error processing.