M62320P/FP
8-bit I/O Expander for I
2
C BUS
REJ03D0863-0300
Rev.3.00
Mar 25, 2008
Description
The M62320P/FP 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
2
C BUS.
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.
•
8-bit data conversion between serial and parallel by I
2
C BUS.
•
Built-in power-on reset.
Application
I/O port expansion for a microcontroller.
Data conversion between serial and parallel in microcontroller peripherals.
Block Diagram
CS0
16
CS1
15
Chip-select
SCL
2
CS2
14
SDA 3
I
2
C Bus
transceiver
Output data
8
Output data
latch
8
Shift register
Input/output
8
1 SO
8
Input data
latch
8
Input data
I/O setting
data latch
8
V
DD
13
GND 8
Power-on
reset
I/O port
12
D7
11
D6
10
D5
9
D4
7
D3
6
D2
5
D1
4
D0
REJ03D0863-0300 Rev.3.00 Mar 25, 2008
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