REJ03D0909-0100 Rev.1.00 Mar 25, 2008

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M62320GP

8-bit I/O Expander for I

REJ03D0909-0100

Rev.1.00

Mar 25, 2008

Description

The M62320GP is a CMOS 8-bit I/O expander, which has serial to parallel and parallel to serial data converting

functions.

It can communicate with a microcontroller via few wiring thanks to the adoption of the two-line I

Parallel data I/O terminal can be set to input or output mode alternatively in individual bits.

Maximum 8 ICs can be connected to a bus by using three chip-select pins, so that it is possible to handle up to 64 bits

data.

Features

• Simple two-line (SCL and SDA) communication with a microcontroller.

• Built-in power-on reset.

Application

I/O port expansion for a microcontroller.

Data conversion between serial and parallel in microcontroller peripherals.

Block Diagram

D0

5

D1

6

D2

7

D3

9

D4

10

D5

11

D6

12

D7

4

13

8

GND

8

8

8

8

8

8

Input data

Output data

Input/output

1

3

SDA

2

SCL

15

CS1

14

CS2

16

CS0

SO

transceiver

Shift register

Input data

latch

I/O setting

data latch

Output data

latch

I/O port

Power-on

reset

Chip-select