M37225M6_15 datasheet(38/128 Pages) RENESAS

Part #	M37225M6

Description	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

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Manufacturer	RENESAS [Renesas Technology Corp]

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M37225M6/M8/MA/MC-XXXSP, M37225ECSP

Rev.1.00

Nov 01, 2000

page 36 of 124

REJ03B0136-0100Z

Fig. 8.6.6 I2C Control Register

b7 b6 b5 b4 b3 b2 b1 b0

0

to

2

Bit counter

(Number of transmit/recieve

bits)

(BC0 to BC2)

b2 b1 b0

0

0: 8

0

1: 7

0

1

0: 6

0

1

1: 5

1

0

0: 4

1

0

1: 3

1

0: 2

1

1: 1

3

I2C-BUS interface use

enable bit (ESO)

0: Disabled

1: Enabled

4

Data format selection

bit(ALS)

0: Addressing format

1: Free data format

5

Addressing format selection

bit (10BIT SAD)

0: 7-bit addressing format

1: 10-bit addressing format

6, 7 Connection control bits

between I C-BUS interface

and ports

(BSEL0, BSEL1)

b7 b6 Connection port (See note)

0

0: None

0

1: SCL1, SDA1

1

0: SCL2, SDA2

1

1: SCL1, SDA1, SCL2, SDA2

0

I2C control register (S1D) [Address 00DA16]

I2C Control Register

B

Name

Functions

After reset R W

2

R W

Note: When using ports P11-P14 as I2C-BUS interface, the output structure changes

automatically from CMOS output to N-channel open-drain output.

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