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MCP23017-E/ML 数据表(PDF) 4 Page - Microchip Technology |
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MCP23017-E/ML 数据表(HTML) 4 Page - Microchip Technology |
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4 / 48 page ![]() MCP23017/MCP23S17 DS21952B-page 4 © 2007 Microchip Technology Inc. 1.1 Pin Descriptions TABLE 1-1: PINOUT DESCRIPTION Pin Name PDIP/ SOIC/ SSOP QFN Pin Type Function GPB0 1 25 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB1 2 26 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB2 3 27 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB3 4 28 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB4 5 1 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB5 6 2 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB6 7 3 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPB7 8 4 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. VDD 95 P Power VSS 10 6 P Ground NC/CS 11 7 I NC (MCP23017), Chip Select (MCP23S17) SCL/SCK 12 8 I Serial clock input SDA/SI 13 9 I/O Serial data I/O (MCP23017), Serial data input (MCP23S17) NC/SO 14 10 O NC (MCP23017), Serial data out (MCP23S17) A0 15 11 I Hardware address pin. Must be externally biased. A1 16 12 I Hardware address pin. Must be externally biased. A2 17 13 I Hardware address pin. Must be externally biased. RESET 18 14 I Hardware reset. Must be externally biased. INTB 19 15 O Interrupt output for PORTB. Can be configured as active-high, active-low or open-drain. INTA 20 16 O Interrupt output for PORTA. Can be configured as active-high, active-low or open-drain. GPA0 21 17 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA1 22 18 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA2 23 19 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA3 24 20 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA4 25 21 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA5 26 22 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA6 27 23 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. GPA7 28 24 I/O Bidirectional I/O pin. Can be enabled for interrupt-on-change and/or internal weak pull-up resistor. |
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