upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 274

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(IICS0) is set to 1, a communication reservation can be made by setting bit 1 (STT) of IIC control register 0 (IICC0) to
1 before a stop condition is detected.
274
The communication reservation timing is shown below.
Communication reservations are acknowledged at the following timing. After bit 1 (STD) of IIC status register 0
SDA
SCL
IIC0:
STT0:
STD0:
SPD0:
Hardware processing
1
Program processing
SDA
STD
SPD
SCL
2
IIC shift register 0
Bit 1 of IIC control register 0 (IICC0)
Bit 1 of IIC status register 0 (IICS0)
Bit 0 of IIC status register 0 (IICS0)
Figure 10-17. Timing for Acknowledging Communication Reservations
3
4
Communication
reservation
STT
=1
Figure 10-16. Communication Reservation Timing
5
CHAPTER 10
6
7
User’s Manual U12768EJ4V1UD
Standby mode
8
SERIAL INTERFACE FUNCTION
Output by master with bus mastership
9
Set SPD
and INTIIC0
Write to
IIC0
Set
STD
1
2
3
4
5
6