NEC V850ES/SA2 UPD703201 Manual page 384

(g) When arbitration loss occurs due to a stop condition when attempting to generate a restart
condition
When WTIM = 1
ST AD6 to AD0
L1: IICS = 1000X110B
L2: IICS = 1000XX00B
∆ 3: IICS = 01000001B
Remark L: Always generated
∆: Generated only when SPIE = 1
X: Don't care
(h) When arbitration loss occurs due to low-level data when attempting to generate a stop condition
When WTIM = 1
ST AD6 to AD0
L1: IICS = 1000X110B
L2: IICS = 1000XX00B
L3: IICS = 01000000B (Example: When ALD is read during interrupt servicing)
∆ 4: IICS = 00000001B
Remark L: Always generated
∆: Generated only when SPIE = 1
X: Don't care
384
CHAPTER 12 SERIAL INTERFACE FUNCTION
RW AK D7 to D0
L1
RW AK D7 to D0
L1
Preliminary User's Manual U15905EJ1V0UD
STT = 1
↓
AK SP
L2 ∆3
SPT = 1
↓
AK D7 to D0 AK
L2 L3
D7 to D0 AK SP
∆4