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Figure 12-25. Master Operation in Multi-Master System (2/3)
A
Enables reserving communication.
STT0 = 1
Wait
MSTS0 = 1?
Yes
Wait state after stop condition
was detected and start condition
was generated by the communication
reservation function.
C
B
Disables reserving communication.
IICBSY = 0?
Yes
D
STT0 = 1
Wait
STCF = 0?
Yes
C
CHAPTER 12 SERIAL INTERFACE IIC0
Prepares for starting communication
(generates a start condition).
Secure wait time by software
(see Table 12-7).
No
No
No
Prepares for starting communication
(generates a start condition).
Secure wait time by software
(see Table 12-7).
No
User's Manual U17854EJ9V0UD
INTIIC0
No
interrupt occurs?
Waits for bus release
(communication being reserved).
Yes
EXC0 = 1 or COI0 =1?
Yes
Slave operation
INTIIC0
No
interrupt occurs?
Waits for bus release
Yes
No
EXC0 = 1 or COI0 =1?
Detects a stop condition.
Yes
Slave operation
D
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