CHAPTER 16 I
2
C BUS
User’s Manual U16896EJ2V0UD
512
The communication reservation timing is shown below.
Figure 16-12. Communication Reservation Timing
2
1
3
4
5
6
2
1
3
4
5
6
7
8
9
SCL0
SDA0
STT0=1
Program processing
Hardware processing
Write
to IIC0
Set
SPD0 and
INTIIC0
Communication
reservation
Set
STD0
Generated by master with bus access
IIC0:
IIC shift register 0
STT0:
Bit 1 of IIC control register 0 (IICC0)
STD0: Bit 1 of IIC status register 0 (IICS0)
SPD0: Bit 0 of IIC status register 0 (IICS0)
Communication reservations are accepted via the following timing. After the IICS0.STD0 bit is set to 1, a
communication reservation can be made by setting the IICC0.STT0 bit to 1 before a stop condition is detected.
Figure 16-13. Timing for Accepting Communication Reservations
SCL0
SDA0
STD0
SPD0
Standby mode
<R>
Содержание V850ES/KE1+
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