SH7261 datasheet(776/1348 Pages) RENESAS

776 / 1348 page

Section 17 I

2C Bus Interface 3 (IIC3)

Rev. 2.00 Sep. 07, 2007 Page 744 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

AL/OVE

R/W

Arbitration Lost Flag/Overrun Error Flag

Indicates that arbitration was lost in master mode with

the I

2C 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

2C 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

AAS

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.

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