M62320FP 查看數據表（PDF） - MITSUBISHI ELECTRIC

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M62320FP

8-BIT I/O EXPANDER for I²C BUS

MITSUBISHI ELECTRIC  

MITSUBISHI < STD. LINEAR ICs >

M62320P,FP

8-BIT I/O EXPANDER for I2 C BUS

FUNCTIONAL DESCRIPTION

All parallel data I/O terminals are set to the input-state after power-on. In case any terminals need to be set to

the output state, the corresponding terminals should be set during the write mode. This setting is hold until a

next setting.

In the write mode, 8 bits data can be transmitted from the I2 C BUS interface to the parallel ports continually after

the slave address and I/O setting.

In the read mode, 8 bits data can be transmitted from the parallel ports to the I2 C BUS interface continually after

the slave address setting.

In the case of a changing between the write- and read-mode, the data must be transmitted again from the

starting condition.

• In a case of a data conversion from serial to parallel.

starting

condition slave address

I/O setting byte

DATA

Transmission from a master (MCU etc.)

Transmission from a slave (M62320)

DATA

stop condition

SDA

SCL

0 1 1 1 A2 A1 A0 0 A P7 P6 P5 P4 P3 P2 P1 P0 A D17D16 D15 D14 D13D12 D11 D10 A D27D26 D25 D24 D23D22 D21 D20 A

1234 5678

1234 5678

D0

to Hi-Z

D7

Data output

D1X

Data output

D2X

• In a case of a data conversion from parallel to serial.

All I/O setting resistors are set to low (input) in the write mode, before a parallel data is read. (All I/O

setting resistors are set to the input mode after power-on.)

start

condition slave address

I/O setting byte

SDA

SCL

0 1 1 1 A2 A1 A0 0 A P7 P6 P5 P4 P3 P2 P1 P0 A

1 234 5678

1234 5678

D0 to D7

output

Hi-Z

Transmission from a master (MCU etc.)

Transmission from a slave (M62320)

start

condition slave address

DATA

DATA

stop condition

DATA

SDA

SCL

0 1 1 1 A2 A1 A0 1 A D17D16 D15 D14 D13D12 D11 D10 A D37 D36 D35 D34 D33 D32 D31 D30 A D47 D46 D45 D44 D43D42 D41 D40 A

1 234 5678

1 23 4 56 7 8

D0 to D7

Input

(example)

D0 to D7

Output

Hi-Z

D1X

D2X

data latch

D3X

data latch

D4X

data latch

MITSUBISHI ELECTRIC

2/20,1998(rev) ( 7 / 9 )

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