Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 19 I
2
C BUS
R01UH0042EJ0500 Rev.5.00 Page 880 of 1513
Aug 12, 2011
Figure 19-19. 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 19-6)
Waiting for bus release
(communication being 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 19-7)
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