h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 529

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Bit 0—Start Condition/Stop Condition Prohibit (SCP): Controls the issuing of start and stop
conditions in master mode. To issue a start condition, write 1 in BBSY and 0 in SCP. A retransmit
start condition is issued in the same way. To issue a stop condition, write 0 in BBSY and 0 in SCP.
This bit is always read as 1. If 1 is written, the data is not stored.
16.2.6
ICSR is an 8-bit readable/writable register that performs flag confirmation and acknowledge
confirmation and control.
ICSR is initialized to H'00 by a reset and in hardware standby mode.
Bit 0
SCP
0
1
Bit
Initial value
Read/Write
Note: * Only 0 can be written, to clear the flags.
I
2
C Bus Status Register (ICSR)
Description
Writing 0 issues a start or stop condition, in combination with the BBSY flag
Reading always returns a value of 1
Writing is ignored
R/(W) *
ESTP
7
0
R/(W) *
STOP
6
0
R/(W) *
IRTR
5
0
Section 16 I
R/(W) *
AASX
4
0
Rev. 4.00 Jun 06, 2006 page 475 of 1004
2
C Bus Interface [H8S/2138 Group Option]
R/(W) *
AL
3
0
R/(W) *
AAS
2
0
R/(W) *
ADZ
REJ09B0301-0400
1
0
(Initial value)
ACKB
R/W
0
0