MCP23018 Просмотр технического описания (PDF) - Microchip Technology
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MCP23018 Datasheet PDF : 56 Pages
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MCP23018/MCP23S18
1.1 Pin Descriptions
TABLE 1-1: I2C PINOUT DESCRIPTION (MCP23018)
Pin
Name
28L
PDIP/
SOIC
24L 24L Pin
QFN SSOP Type
Standard Function
GPB0
3
24
2 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPB1
GPB2
GPB3
GPB4
GPB5
GPB6
GPB7
VDD
VSS
SCL
4
1
3 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
5
2
4 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
6
3
5 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
7
4
6 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
8
5
7 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
9
6
8 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
10
7
9 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
11
8
10 P Power
1
23
1
P Ground
12
9
11
I Serial clock input
SDA
ADDR
13 10 12 I/O Serial data I/O
15
11
13
I Hardware address pin allows up to 8 slave devices on the bus
RESET 16
12
14
I Hardware reset
INTB
18 13 15 O Interrupt output for port B. Can be configured as active high, active low, or
open drain.
INTA
19 14 16 O Interrupt output for port A. Can be configured as active high, active low, or
open drain.
GPA0
20 15 17 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA1
21 16 18 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA2
22 17 19 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA3
23 18 20 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA4
24 19 21 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA5
25 20 22 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA6
26 21 23 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
GPA7
27 22 24 I/O Bidirectional I/O Pin (5.5 volt tolerant inputs; open-drain outputs). Can be
enabled for interrupt on change, and/or internal pull-up resistor.
NC
2, 14, — —
17, 28
EP
—
25
—
Not connected
Exposed Thermal Pad (EP). Do not electrically connect, or connect to VSS.
© 2008 Microchip Technology Inc.
DS22103A-page 5
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