UPD70F3451GC-UBT-A Datasheet, PDF (918/1191 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 17 I²C BUS
Figure 17-17. Master Operation in Multimaster System (2/3)
A _{Communication reservation enabled}
STT0 = 1
Wait
Communication start preparation
(start condition generation)
Securing wait time by software
(see Table 17-6)
MSTS0 = 1?
No
Yes
INTIIC
No
interrupt occurred?
Waiting for bus release
(communication reserved)
Yes
No
Wait status after stop condition
detection and start condition generation
by communication reservation function
EXC0 = 1 or COI0 =1?
Yes
C
Slave operation
B _{Communication reservation disabled}
IICBSY0 = 0?
No
Yes
D
STT0 = 1
Wait
Communication start preparation
(start condition generation)
Securing wait time by software
(see Table 17-7)
STCF0 = 0?
No
Yes
C
INTIIC
interrupt occurred?
Yes
No
Waiting for bus release
Yes
EXC0 = 1 or COI0 =1?
No Stop condition detection
D
Slave operation
916
User’s Manual U18279EJ3V0UD