NEC 78K0 Series User Manual page 461

(4) Operation without communication
(a) Start ~ Code ~ Data ~ Data ~ Stop
ST AD6 to AD0 R/W ACK
1: IICS0 = 00000001B
Remark : Generated only when SPIE0 = 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 MSTS0 bit each time interrupt request
signal INTIIC0 has occurred to check the arbitration result.
(a) When arbitration loss occurs during transmission of slave address data
(i) When WTIM0 = 0
ST AD6 to AD0 R/W ACK
1: IICS0 = 0101×110B
2: IICS0 = 0001×000B
3: IICS0 = 0001×000B
4: IICS0 = 00000001B
Remark : Always generated
: Generated only when SPIE0 = 1
×: Don't care
CHAPTER 17 SERIAL INTERFACE IIC0
D7 to D0 ACK
D7 to D0 ACK
1 2
Preliminary User's Manual U17260EJ3V1UD
D7 to D0 ACK SP
1
D7 to D0 ACK SP
3 4
461