NEC V850/SA1 mPD703015 Preliminary User's Manual page 256

(e) When loss occurs due to stop condition during data transfer
ST AD6-AD0
1 : IICS0 = 1000X110B
∆ 2 : IICS0 = 01000001B
Remarks
(f) When arbitration loss occurs due to low-level data when attempting to generate a restart condition
<1> When WTIM = 0
ST AD6-AD0
1 : IICS0 = 1000X110B
2 : IICS0 = 1000X000B
3 : IICS0 = 01000000B (Example: when ALD is read during interrupt servicing)
∆ 4 : IICS0 = 00000001B
Remarks
256
CHAPTER 10 SERIAL INTERFACE FUNCTION
RW AK D7-Dn
1
: Always generated
∆ : Generated only when SPIE = 1
X : don't care
Dn = D6-D0
RW AK D7-D0
1
: Always generated
∆ : Generated only when SPIE = 1
X : don't care
SP
∆2
STT = 1
↓
AK D7-D0 AK
2 3
D7-D0 AK SP
∆4