Renesas SH7264 User Manual

 
Section 17   I

2

C Bus Interface 3 

Page 864 of 2108 

 

R01UH0134EJ0400  Rev. 4.00 

 

 Sep 

24, 

2014 

SH7262 Group, SH7264 Group

2 

AL/OVE 

0 

R/W 

Arbitration Lost Flag/Overrun Error Flag 

Indicates that arbitration was lost in master mode with 
the I

2

C bus format and that the final bit has been 

received while RDRF = 1 with the clocked synchronous 
format. 

When two or more master devices attempt to seize the 
bus at nearly the same time, if the I

2

C bus interface 3 

detects data differing from the data it sent, it sets AL to 
1 to indicate that the bus has been occupied by another 
master. 

[Clearing condition] 
  When 0 is written in AL/OVE after reading AL/OVE 

= 1 

[Setting conditions] 
  If the internal SDA and SDA pin disagree at the rise 

of SCL in master transmit mode 

  When the SDA pin outputs high in master mode 

while a start condition is detected 

  When the final bit is received with the clocked 

synchronous format while RDRF = 1 

1 AAS  0 R/W 

Slave 

Address Recognition Flag 

In slave receive mode, this flag is set to 1 if the first 
frame following a start condition matches bits SVA[6:0] 
in SAR. 

[Clearing condition] 
  When 0 is written in AAS after reading AAS = 1 
[Setting conditions] 
  When the slave address is detected in slave receive 

mode 

  When the general call address is detected in slave 

receive mode. 

0 

ADZ 

0 

R/W 

General Call Address Recognition Flag 

This bit is valid in slave receive mode with the I

2

C bus 

format. 

[Clearing condition] 
  When 0 is written in ADZ after reading ADZ = 1 
[Setting condition] 
  When the general call address is detected in slave 

receive mode