HD6432138SW datasheet(533/1061 Pages) RENESAS

533 / 1061 page

Section 16 I

2C Bus Interface [H8S/2138 Group Option]

Rev. 4.00 Jun 06, 2006 page 479 of 1004

REJ09B0301-0400

AAS is cleared by reading AAS after it has been set to 1, then writing 0 in AAS. In addition, AAS

is reset automatically by write access to ICDR in transmit mode, or read access to ICDR in receive

mode.

Bit 2

AAS

Description

Slave address or general call address not recognized

(Initial value)

[Clearing conditions]

1. When ICDR data is written (transmit mode) or read (receive mode)

2. When 0 is written in AAS after reading AAS = 1

3. In master mode

Slave address or general call address recognized

[Setting condition]

When the slave address or general call address is detected in slave receive mode

while FS = 0

Bit 1—General Call Address Recognition Flag (ADZ): In I

2C bus format slave receive mode,

this flag is set to 1 if the first frame following a start condition is the general call address (H'00).

ADZ is cleared by reading ADZ after it has been set to 1, then writing 0 in ADZ. In addition, ADZ

is reset automatically by write access to ICDR in transmit mode, or read access to ICDR in receive

mode.

Bit 1

ADZ

Description

General call address not recognized

(Initial value)

[Clearing conditions]

1. When ICDR data is written (transmit mode) or read (receive mode)

2. When 0 is written in ADZ after reading ADZ = 1

3. In master mode

General call address recognized

[Setting condition]

When the general call address is detected in slave receive mode while FSX = 0 or FS

= 0

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