732 Adafruit

MCP23017/MCP23S17 16-Bit I/O Expander with Serial Interface Features Package Types 16-bit remote bidirectional I/O port 1 28 GPA7 GPB0 PDIP, 2 27 GPA6 GPB1 - I/O pins default to input SOIC, 3 26 GPA5 GPB2 2 SSOP 4 25 GPA4 C interface (MCP23017) GPB3 High-speed I 5 24 GPA3 GPB4 - 100 kHz GPB5 6 23 GPA2 GPB6 7 22 GPA1 - 400 kHz 8 21 GPA0 GPB7 VDD 9 20 -1.7MHz INTA VSS 10 19 INTB High-speed SPI interface (MCP23S17) NC 11 18 RESET 12 17 SCL A2 - 10 MHz (max.) 13 16 SDA A1 14 15 Three hardware address pins to allow up to eight NC A0 devices on the bus Configurable interrupt output pins QFN - Configurable as active-high, active-low or 28272625242322 open-drain GPB4 1 21 GPA4 INTA and INTB can be configured to operate GPA3 2 20 GPB5 3 19 GPA2 independently or together GPB6 4 18 GPA1 GPB7 MCP23017 Configurable interrupt source V DD 5 17 GPA0 V INTA SS 6 16 - Interrupt-on-change from configured register INTB NC 7 15 defaults or pin changes 8 9 1011121314 Polarity Inversion register to configure the polarity of the input port data External Reset input Low standby current: 1 A (max.) Operating voltage: 1 28 GPA7 PDIP, GPB0 GPB1 2 27 GPA6 SOIC, - 1.8V to 5.5V -40C to +85C GPB2 3 26 GPA5 SSOP GPB3 4 25 GPA4 - 2.7V to 5.5V -40C to +85C GPB4 5 24 GPA3 - 4.5V to 5.5V -40C to +125C 6 23 GPA2 GPB5 7 22 GPA1 GPB6 8 21 GPA0 GPB7 Packages VDD 9 20 INTA VSS 10 19 INTB 28-pin PDIP (300 mil) CS 11 18 RESET SCK 12 17 A2 28-pin SOIC (300 mil) 13 16 SI A1 14 15 SO A0 28-pin SSOP 28-pin QFN QFN 28272625242322 21 GPA4 GPB4 1 20 GPA3 2 GPB5 GPA2 3 19 GPB6 GPA1 GPB7 4 18 MCP23S17 V DD 5 17 GPA0 V SS INTA 6 16 7 15 INTB CS 8 9 1011121314 2007 Microchip Technology Inc. DS21952B-page 1 MCP23S17 MCP23017 SCK GPB3 SCL GPB3 SI GPB2 SDA GPB2 SO GPB1 NC GPB1 A0 MCP23S17 GPB0 MCP23017 A0 GPB0 A1 GPA7 A1 GPA7 A2 GPA6 A2 GPA6 RESET GPA5 RESET GPA5MCP23017/MCP23S17 Functional Block Diagram MCP23S17 CS SCK SI SPI SO MCP23017 GPB7 Serializer/ SCL GPB6 2 I C Deserializer SDA GPB5 GPB4 3 GPIO GPB3 A2:A0 Decode GPB2 RESET GPB1 Control GPB0 16 INTA Interrupt INTB Logic GPA7 GPA6 8 GPA5 GPA4 GPIO GPA3 GPA2 Configuration/ Control GPA1 Registers GPA0 DS21952B-page 2 2007 Microchip Technology Inc.