Renesas RL78 Series User Manual page 609

RL78/G1D
(g) When arbitration loss occurs due to a stop condition when attempting to generate a restart condition
(i) When WTIMn = 0
ST AD6 to AD0 R/W ACK
1: IICSn = 1000×110B
2: IICSn = 1000×000B (Sets the WTIMn bit to 1)
3: IICSn = 1000××00B (Sets the STTn bit to 1)
4: IICSn = 01000001B
Remark : Always generated
: Generated only when SPIEn = 1
×: Don't care
(ii) When WTIMn = 1
ST AD6 to AD0 R/W ACK
1: IICSn = 1000×110B
2: IICSn = 1000××00B (Sets the STTn bit to 1)
3: IICSn = 01000001B
Remark : Always generated
: Generated only when SPIEn = 1
×: Don't care
Remark n = 0
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
D7 to D0 ACK
1 2
D7 to D0 ACK
1
CHAPTER 14 SERIAL INTERFACE IICA
STTn = 1
↓
SP
3 4
STTn = 1
↓
SP
2 3
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