Rev. 1.0, 02/00, page 480 of 1141
23.2.6
I
2
C Bus Status Register (ICSR)
7
ESTP
0
R/(W)*
6
STOP
0
R/(W)*
5
IRTR
0
R/(W)*
4
AASX
0
R/(W)*
3
AL
0
R/(W)*
0
ACKB
0
R/W
2
AAS
0
R/(W)*
1
ADZ
0
R/(W)*
Note: * Only 0 can be written to clear the flag.
Bit :
Initial value :
R/W :
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.
Bit 7
Error Stop Condition Detection Flag (ESTP): Indicates that a stop condition has been
detected during frame transfer in I
2
C bus format slave mode.
Bit 7
ESTP
Description
0
No error stop condition
(Initial value)
[Clearing condition]
1. When 0 is written in ESTP after reading ESTP = 1
2. When the IRIC flag is cleared to 0
1
•
In I
2
C bus format slave mode: Error stop condition detected
[Setting condition]
When a stop condition is detected during frame transfer
•
In other modes: No meaning