M37151EFFP datasheet(34/138 Pages) RENESAS

Part #	M37151EFFP

Description	SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER

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Manufacturer	RENESAS [Renesas Technology Corp]

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M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP

Rev.1.00

Nov 01, 2002

page 34 of 136

REJ03B0129-0100Z

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

3I2C-BUS interface use

enable bit (ESO)

0 : Disabled

1: Enabled

4

Data format selection

bit(ALS)

0 : Addressing mode

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 I2C-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

0

I2C control register (S1D) [Address 00F916]

I2C Control Register

B

Name

Functions

After reset

R W

Note: • Set the corresponding direction register to "1" to use the port as multi-master I2C-BUS interface.

• To use SCL1, SDA1, SCL2 and SDA2, set the port P3 Register (address 00C616) bit 2 to 0.

R W

SCL2, SDA2

Fig. 8.6.7 Port P3 Register

Port P3 register (P3)

[Address 00C616]

Port P3 register

0

1

2

Port P3 register

Indeterminate

W

R

4 to

7

b7 b6 b5 b4 b3 b2 b1 b0

Nothing is assigned. This bit is write disable bit.

When this bit is read out, the value is "0."

W

R

0

W

R

0

–

R

3

(BSEL20)

(See note)

0

W

R

SCL3/P31-SCL1/P11

SDA3/P30-SDA1/P13

Connection control bit (BSEL21)

Notes • For the ports used as the Multi-master I

2C-BUS interface, set their direction registers to 1.

• To use SCL3 and SDA3, set the I

2C Control Register (address 00F916) bits 6–7 to 0.

BName

Functions

After reset

R W

Port P30 data

Port P31 data

Switch bit of I

2C-BUS

interface and port P3

0:

Port P30, Port P31

1: I

2CBUS (SDA3,SCL3)

0: Cutting

1: Connection

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