RL78/G1P
CHAPTER 12 SERIAL INTERFACE IICA
R01UH0895EJ0100 Rev.1.00
525
Nov 29, 2019
(4) Operation without communication
(a) Start ~ Code ~ Data ~ Data ~ Stop
ST
AD6 to AD0
R/W ACK
D7 to D0
D7 to D0
ACK
ACK
SP
1
1: IICSn = 00000001B
Remark
: Generated only when SPIEn = 1
(5) Arbitration loss operation (operation as slave after arbitration loss)
When the device is used as a master in a multi-master system, read the MSTSn bit each time interrupt request
signal INTIICAn has occurred to check the arbitration result.
(a) When arbitration loss occurs during transmission of slave address data
(i) When WTIMn = 0
ST
AD6 to AD0
R/W ACK
D7 to D0
D7 to D0
ACK
ACK
SP
3
4
2
1
1: IICSn = 0101×110B
2: IICSn = 0001×000B
3: IICSn = 0001×000B
4: IICSn = 00000001B
Remark
: Always
generated
: Generated only when SPIEn = 1
×:
Don’t
care
Remark
n = 0, 1