M38040F2HKP datasheet(210/387 Pages) RENESAS

210 / 387 page

2-86

APPLICATION

2.5 Multi-master I2C-BUS interface

Rev.1.00 Jan 14, 2005

REJ09B0212-0100Z

3804 Group (Spec.H)

Fig. 2.5.4 Structure of I2C special mode status register

I2C special mode status register

b7 b6 b5 b4 b3 b2 b1 b0

I2C special mode status register

(S3: address 001216)

Name

Functions

At reset R W

Slave address 0

comparison flag

(AAS0)

0: Address disagreement

1: Address agreement

(Notes 1, 2)

Slave address 1

comparison flag

(AAS1)

0: Address disagreement

1: Address agreement

(Notes 1, 2)

Slave address 2

comparison flag

(AAS2)

0: SCL pin low hold

1: SCL pin low release

(Notes 1, 3)

SCL pin low hold 2

flag (PIN2)

STOP condition

flag (SPCF)

0: No detection

1: Detection (Notes 1, 4)

Notes 1: These bits and flags can be read out, but cannot be written.

2: These bits can be detected only when the data format selection bit

(ALS) of I2C control register is set to 0 .

3: This bit is initialized to 1 at reset, when the ACK interrupt control bit

is 0 , or when writing 1 to the SCL pin low hold 2 flag set bit.

4: This bit is initialized to 0 at reset, when the I2C-BUS interface

enable bit (ES0) is 0 , or when writing 1 to the STOP condition

flag clear bit.

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are 0 .

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are 0 .

0: Address disagreement

1: Address agreement

(Notes 1, 2)

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are undefined.

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