M37207MF datasheet(106/122 Pages) RENESAS

106 / 122 page

105

MITSUBISHI MICROCOMPUTERS

M37207MF-XXXSP/FP, M37207M8-XXXSP

M37207EFSP/FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER

and ON-SCREEN DISPLAY CONTROLLER

I2C Control Register

I2C Status Register

Address 00DC16

Address 00DB16

b7 b6 b5 b4 b3 b2 b1 b0

I2C status register (S1) [Address 00DB16]

I2C Status Register

6, 7

b7 b6

0 : Slave recieve mode

1 : Slave transmit mode

0 : Master recieve mode

1 : Master transmit mode

Name

Functions

After reset RW

Communication mode

specification bits

(TRX, MST)

0 : Bus free

1 : Bus busy

Bus busy flag (BB)

0 : Interrupt request issued

1 : No interrupt request issued

I2C-BUS interface interrupt

request bit (PIN)

0 : Not detected

1 : Detected

Arbitration lost detecting flag

(AL) (See note)

0 : Address mismatch

1 : Address match

Slave address comparison

flag (AAS) (See note)

0 : No general call detected

1 : General call detected

General call detecting flag

(AD0) (See note)

0 : Last bit = “0 ”

1 : Last bit = “1 ”

Last receive bit (LRB)

(See note)

Note : These bits and flags can be read out, but cannnot be written.

Indeterminate R—

R—

b7 b6 b5 b4 b3 b2 b1 b0

Bit counter

(Number of transmit/recieve

bits)

(BC0 to BC2)

b2 b1 b0

0 : 8

1 : 7

0 : 6

1 : 5

0 : 4

1 : 3

0 : 2

1 : 1

I2C-BUS interface use

enable bit (ESO)

0 : Disabled

1 : Enabled

Data format selection bit

(ALS)

0 : Addressing mode

1 : Free data format

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

b7 b6 Connection port (See note)

0 : None

1 : SCL1, SDA1

0 : SCL2, SDA2

1 : SCL1, SDA1

SCL2, SDA2

I2C control register (S1D : address 00DC 16)

I2C Control Register

Name

Functions

After reset RW

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

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

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