h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 551

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

17.3.9
ICSRB monitors operating state transitions and error status of the IIC operation reservation
adapter.
Bit
7
6
Bit Name
CREQ
CERR
IIC Operation Reservation Adapter Status Register B (ICSRB)
Initial Value
0
0
R/W
R/(W) * Operation Reservation Command Write Request
R/(W) * Operation Reservation Command Error Flag
Description
Interrupt Flag
0: No command write request is generated
1: Command write request is generated
[Clearing conditions]
[Setting condition]
0: No command error is generated
1: Command error is generated
[Clearing conditions]
[Setting conditions]
CREQ Generation Source
Automatic command transition after
slave address match
ACKB = 1 received (NACK = 1) when
the acknowledge bit is enabled in transmit
mode
Stop condition detected (STOPIMX = 0 while
STOP = 1 or ABRT = 1)
Arbitration lost (ALST = 1)
Timeover generated (TOVR = 1)
Undefined command is written
When ICCMD is read from or written to
When 0 is written to CREQ after reading CREQ = 1
When ICCMD is written to
When 0 is written to CERR after reading CERR = 1
When arbitration loss is generated
When a timeover is generated
When a start/stop condition is detected during
transfer
When NAK is received
Rev. 3.00 Jan 25, 2006 page 499 of 872
Section 17 I
2
C Bus Interface (IIC)
Generation Timing
Rise of 9th clock
Rise of 9th clock
Stop condition detected
Always
Always
Always
REJ09B0286-0300