M62320FP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

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

• In case the I/O setting is different between each terminals.

An example : the parallel port terminals of D0 to D3 and D4 to D7 are assigned as output and input terminals,

respectively.

start condition

slave address

I / O setting

DATA

stop condition

DATA

SDA

SCL

0 1 1 1 A2 A1 A0 0 A P7 P6 P5 P4 P3 P2 P1 P0 A D17 D16 D15 D14 D13D12 D11 D10 A D27 D26 D25 D24 D23D22 D21 D20 A

1 234 567 8

1 234 567 8

D0 to D3 Hi-Z

Data output

D1X

Data output

D2X

D4 to D7 Hi-Z

start condition

slave address

DATA

DATA

DATA

stop condition

SDA

SCL

0 1 1 1 A2 A1 A0 1 A D17 D16 D15 D14 D13D12 D11 D10 A D37 D36 D35 D34 D33D32 D31 D30 A D47D46 D45 D44 D43D42 D41 D40 A

1 234 5 67 8

1 234 567 8

D0 to D3

D4 to D7

(instance)

D4 to D7

output

Hi-Z

D1X

data latch

D2X

D3X

data latch

D4X

data latch

• Write mode

The terminal assigned as an output provides the data written in the output data latch.

After power-on, all terminals are reset to the input-state. Then an initial data low of the output latch are

output after the I/O setting has been done. Finally the assigned output are provided after the 8-bit data

transmission.

The terminal assigned as an input keeps the input condition (high-impedance) regardless of 8-bit data

setting.

• Read mode

The input data is taken into the input latch on every 8th negative-going edge of the SCL clock through the

terminal assigned as an input, and then the latched data is output via the SDA line.

The data of the output assigned terminal is also handled in the same procedures as above.

MITSUBISHI ELECTRIC

2/20,1998(rev) ( 8 / 9 )

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