Datasheet

V850ES/JG3 CHAPTER 17 I
2
C BUS
R01UH0015EJ0300 Rev.3.00 Page 593 of 870
Sep 30, 2010
Figure 17-15. 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 17-16. Timing for Accepting Communication Reservations
SCL0n
SDA0n
STDn
SPDn
Standby mode
Remark n = 0 to 2