H8SXSLASH1663M datasheet(1079/1504 Pages) RENESAS

1079 / 1504 page

Section 21 I

2C Bus Interface 2 (IIC2)

Rev. 2.00 Sep. 24, 2008 Page 1047 of 1468

REJ09B0412-0200

Bit

Bit Name

Initial

Value

R/W

Description

R/W

Arbitration Lost Flag

This flag indicates that arbitration was lost in master

mode.

When two or more master devices attempt to seize the

bus at nearly the same time, the I2C bus monitors

SDA, and if the I2C bus interface detects data differing

from the data it sent, it sets AL to 1 to indicate that the

bus has been taken by another master.

[Setting conditions]

• When the internal SDA and the SDA pin level

disagree at the rising of SCL in master transmit

mode

• When the SDA pin outputs a high level in master

mode while a start condition is detected

[Clearing condition]

• When 0 is written to this bit after reading AL = 1

(When the CPU is used to clear this flag by writing

0 while the corresponding interrupt is enabled, be

sure to read the flag after writing 0 to it.)

AAS

R/W

Slave Address Recognition Flag

In slave receive mode, this flag is set to 1 when the first

frame following a start condition matches bits SVA6 to

SVA0 in SAR.

[Setting conditions]

• When the slave address is detected in slave

receive mode

• When the general call address is detected in slave

receive mode

[Clearing condition]

• When 0 is written to this bit after reading AAS = 1

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