UPD78F1502AGK-GAK-AX Datasheet, PDF (659/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 15 SERIAL INTERFACE IICA
(f) When arbitration loss occurs due to low-level data when attempting to generate a restart condition
(i) When WTIM = 0
STT = 1
↓
ST AD6 to AD0 R/W ACK D7 to D0
1
ACK D7 to D0
23
ACK
4
D7 to D0
ACK SP
5
1: IICS = 1000×110B
2: IICS = 1000×000B (Sets WTIM to 1)
3: IICS = 1000×100B (Clears WTIM to 0)
4: IICS = 01000000B
5: IICS = 00000001B
Remark : Always generated
: Generated only when SPIE = 1
×: Don’t care
(ii) When WTIM = 1
STT = 1
↓
ST AD6 to AD0 R/W ACK D7 to D0
1
ACK D7 to D0
2
ACK D7 to D0
3
ACK SP
4
1: IICS = 1000×110B
2: IICS = 1000×100B (Sets STT to 1)
3: IICS = 01000100B
4: IICS = 00000001B
Remark : Always generated
: Generated only when SPIE = 1
×: Don’t care
R01UH0004EJ0501 Rev.5.01
643
Jun 20, 2011