Datasheet

Section 17 I
2
C Bus Interface (IIC)
Rev. 3.00 Sep. 28, 2009 Page 526 of 910
REJ09B0350-0300
Bit Bit Name
Initial
Value
R/W Description
4 AASX 0 R/(W)* Second Slave Address Recognition Flag
In I
2
C bus format slave receive mode, this flag is set to
1 if the first frame following a start condition matches
bits SVAX6 to SVAX0 in SARX.
[Setting condition]
When the second slave address is detected in slave
receive mode and FSX = 0 in SARX
[Clearing conditions]
• When 0 is written in AASX after reading AASX = 1
• When a start condition is detected
• In master mode
3 AL 0 R/(W)* Arbitration Lost Flag
Indicates that arbitration was lost in master mode.
[Setting conditions]
When ALSL=0
• If the internal SDA and SDA pin disagree at the rise
of SCL in master transmit mode
• If the internal SCL line is high at the fall of SCL in
master mode
When ALSL=1
• If the internal SDA and SDA pin disagree at the rise
of SCL in master transmit mode
• If the SDA pin is driven low by another device
before the I
2
C bus interface drives the SDA pin low,
after the start condition instruction was executed in
master transmit mode
[Clearing conditions]
• When ICDR is written to (transmit mode) or read
from (receive mode)
• When 0 is written in AL after reading AL = 1