Datasheet

Section 16 I
2
C Bus Interface (IIC) (Option)
Rev. 6.00 Mar. 18, 2010 Page 649 of 982
REJ09B0054-0600
16.3.7 I
2
C Bus Status Register (ICSR)
ICSR consists of status flags.
Bit Bit Name
Initial
Value R/W Description
7 ESTP 0 R/(W)
*
Error Stop Condition Detection Flag
This bit is valid in I
2
C bus format slave mode.
[Setting condition]
When a stop condition is detected during frame transfer
[Clearing conditions]
• When 0 is written in ESTP after reading the state of 1
• When the IRIC flag is cleared to 0
6 STOP 0 R/(W)
*
Normal Stop Condition Detection Flag
This bit is valid in I
2
C bus format slave mode.
[Setting condition]
When a stop condition is detected during frame transfer
[Clearing conditions]
• When 0 is written in STOP after reading STOP = 1
• When the IRIC flag is cleared to 0
5 IRTR 0 R/(W)
*
I
2
C Bus Interface Continuous Transmission/Reception
Interrupt Request Flag
[Setting conditions]
In I
2
C bus interface slave mode
• When the TDRE or RDRF flag is set to 1 when AASX = 1
In I
2
C bus interface other modes
• When the TDRE or RDRF flag is set to 1
[Clearing conditions]
• When 0 is written in IRTR after reading IRTR = 1
• When the IRIC flag is cleared to 0 while ICE is 1