Datasheet

V850ES/JG3-H, V850ES/JH3-H CHAPTER 19 I
2
C BUS
R01UH0042EJ0500 Rev.5.00 Page 873 of 1513
Aug 12, 2011
Figure 19-15. Communication Reservation Timing
21 3456 21 3456789
SCL0n
SDA0n
Program processing
Hardware processing
Write to
IICn
Set SPDn
and INTIICn
STTn
=1
Communication
reservation
Set
STDn
Generated by master with bus access
Remark n = 0 to 2
STTn: Bit of IICCn register
STDn: Bit of IICSn register
SPDn: Bit of IICSn register
Communication reservations are accepted via the following timing. After the IICSn.STDn bit is set to 1, a
communication reservation can be made by setting the IICCn.STTn bit to 1 before a stop condition is detected (n = 0 to 2).
Figure 19-16. Timing for Accepting Communication Reservations
SCL0n
SDA0n
STDn
SPDn
Standby mode
Remark n = 0 to 2