UPD78F1502AGK-GAK-AX Datasheet, PDF (643/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 15 SERIAL INTERFACE IICA
(b) Start ~ Address ~ Data ~ Start ~ Address ~ Data ~ Stop (restart)
(i) When WTIM = 0
ST AD6 to AD0 R/W ACK D7 to D0
1
STT = 1
↓
ACK ST AD6 to AD0 R/W ACK D7 to D0
23
4
SPT = 1
↓
ACK SP
567
1: IICS = 1000×110B
2: IICS = 1000×000B (Sets WTIM to 1)^{Note 1}
3: IICS = 1000××00B (Clears WTIM to 0^{Note 2}, sets STT to 1)
4: IICS = 1000×110B
5: IICS = 1000×000B (Sets WTIM to 1)^{Note 3}
6: IICS = 1000××00B (Sets SPT to 1)
7: IICS = 00000001B
Notes 1. To generate a start condition, set WTIM to 1 and change the timing for generating the INTIICA
interrupt request signal.
2. Clear WTIM to 0 to restore the original setting.
3. To generate a stop condition, set WTIM to 1 and change the timing for generating the INTIICA
interrupt request signal.
Remark : Always generated
: Generated only when SPIE = 1
×: Don’t care
(ii) When WTIM = 1
ST AD6 to AD0 R/W ACK D7 to D0
1
STT = 1
↓
ACK ST
2
AD6 to AD0 R/W ACK D7 to D0
3
SPT = 1
↓
ACK SP
45
1: IICS = 1000×110B
2: IICS = 1000××00B (Sets STT to 1)
3: IICS = 1000×110B
4: IICS = 1000××00B (Sets SPT to 1)
5: IICS = 00000001B
Remark : Always generated
: Generated only when SPIE = 1
×: Don’t care
R01UH0004EJ0501 Rev.5.01
627
Jun 20, 2011