Datasheet

V850ES/JG3 CHAPTER 17 I
2
C BUS
R01UH0015EJ0300 Rev.3.00 Page 600 of 870
Sep 30, 2010
Figure 17-19. Master Operation in Multimaster System (2/3)
STTn = 1
Wait
Slave operation
Yes
MSTSn = 1?
EXCn = 1 or COIn =1?
Communication start preparation
(start condition generation)
Securing wait time by software
(refer to Table 17-6)
Waiting for bus release
(communication reserved)
Wait status after stop condition
detection and start condition generation
by communication reservation function
No
INTIICn
interrupt occurred?
Yes
Yes
No
No
A
C
STTn = 1
Wait
Slave operation
Yes
IICBSYn = 0?
EXCn = 1 or COIn =1?
Communication start preparation
(start condition generation)
Communication reservation disabled
Communication reservation enabled
Securing wait time by software
(refer to Table 17-7)
Waiting for bus release
Stop condition detection
No
No
INTIICn
interrupt occurred?
Yes
Yes
No
Yes
STCFn = 0?
No
B
D
C
D
Communication processing Communication processing
Remark n = 0 to 2