MCP23016 查看數據表（PDF） - Microchip Technology
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MCP23016 Datasheet PDF : 38 Pages
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MCP23016
1.0 DEVICE OVERVIEW
The MCP23016 device provides 16-bit, general
purpose, parallel I/O expansion for I2C bus
applications.
This device includes high-current drive capability, low
supply current and individual I/O configuration. I/O
expanders provide a simple solution when additional
I/Os are needed for ACPI, power switches, sensors,
push buttons, LEDs and so on.
The MCP23016 consists of multiple 8-bit configuration
registers for input, output and polarity selection. The
system master can enable the I/Os as either inputs or
outputs by writing the I/O configuration bits. The data
for each input or output is kept in the corresponding
1.1 Pin Descriptions
TABLE 1-1: PINOUT DESCRIPTION
Pin Name
PDIP,
SOIC,
SSOP
Pin No.
QFN
Pin No.
CLK
TP
GP1.0
GP1.1
GP1.2
GP1.3
GP1.4
GP1.5
GP1.6
GP1.7
GP0.0
GP0.1
GP0.2
GP0.3
GP0.4
GP0.5
GP0.6
GP0.7
SCL
SDA
INT
A0
A1
A2
VSS
VDD
9
10
2
3
4
5
7
11
12
13
21
22
23
24
25
26
27
28
14
15
6
16
17
18
1, 8, 19
20
6
7
27
28
1
2
4
8
9
10
18
19
20
21
22
23
24
25
11
12
3
13
14
15
5, 16, 26
17
I/O/P
Type
I
O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I/O
O
I
I
I
P
P
input or output register. The polarity of the read register
can be inverted with the polarity inversion register (see
Section 1.7.3, “Input Polarity Registers”). All
registers can be read by the system master.
The open-drain interrupt output is activated when any
input state differs from its corresponding input port
register state. This is used to indicate to the system
master that an input state has changed. The interrupt
capture register captures port value at this time. The
Power-on Reset sets the registers to their default val-
ues and initializes the device state machine.
Three device inputs (A0 - A2) determine the I2C
address and allow up to eight I/O expander devices to
share the same I2C bus.
Buffer
Type
Description
ST
Clock source input
—
Test Pin (This pin must be left floating)
TTL D0 digital input/output for GP1
TTL D1 digital input/output for GP1
TTL D2 digital input/output for GP1
TTL D3 digital input/output for GP1
TTL D4 digital input/output for GP1
ST
D5 digital input/output for GP1
ST
D6 digital input/output for GP1
ST
D7 digital input/output for GP1
TTL D0 digital input/output for GP0
TTL D1 digital input/output for GP0
TTL D2 digital input/output for GP0
TTL D3 digital input/output for GP0
TTL D4 digital input/output for GP0
TTL D5 digital input/output for GP0
TTL D6 digital input/output for GP0
TTL D7 digital input/output for GP0
ST
Serial clock input
ST
Serial data I/O
OD
Interrupt output
ST
Address input 1
ST
Address input 2
ST
Address input 3
—
Ground reference for logic and I/O pins
—
Positive supply for logic and I/O pins
© 2007 Microchip Technology Inc.
DS20090C-page 3
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