Gravity: MCP23017 I2C 16 Digital IO Expansion Module
IO expander using MCP23017 over I2C, adding 16 GPIO pins (GPIOA/GPIOB) with interrupt support. Up to 8 I2C addresses allow 128 total IOs; supports 3.3V and 5V.
IO expander using MCP23017 over I2C, adding 16 GPIO pins (GPIOA/GPIOB) with interrupt support. Up to 8 I2C addresses allow 128 total IOs; supports 3.3V and 5V.
Positive supply for the DFR0626 Gravity MCP23017 I2C expansion module.
Negative/ground reference for the module.
I2C clock line.
I2C data line.
Reset pin.
GPIOA interrupt detection output.
GPIOB interrupt detection output.
Power indicator on the module.
I2C address switch group for selecting addresses 0x20 through 0x27.
Configurable GPIOA digital I/O 0; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 1; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 2; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 3; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 4; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 5; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 6; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOA digital I/O 7; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 0; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 1; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 2; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 3; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 4; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 5; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 6; input, output, pull-up input, or interrupt-capable input.
Configurable GPIOB digital I/O 7; input, output, pull-up input, or interrupt-capable input.
| Pin | Position | Type | Function | Voltage |
|---|---|---|---|---|
| +/VCC | DFRobot wiki pinout table num 1 | power | Positive supply for the DFR0626 Gravity MCP23017 I2C expansion module. | 3.3V-5.5V |
| -/GND | DFRobot wiki pinout table num 2 | ground | Negative/ground reference for the module. | 0V |
| C | DFRobot wiki pinout table num 3 | i2c | I2C clock line. | |
| D | DFRobot wiki pinout table num 4 | i2c | I2C data line. | |
| RST | DFRobot wiki pinout table num 5 | digital | Reset pin. | |
| IA | DFRobot wiki pinout table num 6 | interrupt | GPIOA interrupt detection output. | |
| IB | DFRobot wiki pinout table num 7 | interrupt | GPIOB interrupt detection output. | |
| PWR | DFRobot wiki pinout table num 8 | indicator | Power indicator on the module. | |
| A0/A1/A2 | DFRobot wiki pinout table num 9 and reference address table | configuration | I2C address switch group for selecting addresses 0x20 through 0x27. | |
| PA0 | DFRobot wiki Digital I/O Port Mapping GPIOA index 0 | digital | Configurable GPIOA digital I/O 0; input, output, pull-up input, or interrupt-capable input. | |
| PA1 | DFRobot wiki Digital I/O Port Mapping GPIOA index 1 | digital | Configurable GPIOA digital I/O 1; input, output, pull-up input, or interrupt-capable input. | |
| PA2 | DFRobot wiki Digital I/O Port Mapping GPIOA index 2 | digital | Configurable GPIOA digital I/O 2; input, output, pull-up input, or interrupt-capable input. | |
| PA3 | DFRobot wiki Digital I/O Port Mapping GPIOA index 3 | digital | Configurable GPIOA digital I/O 3; input, output, pull-up input, or interrupt-capable input. | |
| PA4 | DFRobot wiki Digital I/O Port Mapping GPIOA index 4 | digital | Configurable GPIOA digital I/O 4; input, output, pull-up input, or interrupt-capable input. | |
| PA5 | DFRobot wiki Digital I/O Port Mapping GPIOA index 5 | digital | Configurable GPIOA digital I/O 5; input, output, pull-up input, or interrupt-capable input. | |
| PA6 | DFRobot wiki Digital I/O Port Mapping GPIOA index 6 | digital | Configurable GPIOA digital I/O 6; input, output, pull-up input, or interrupt-capable input. | |
| PA7 | DFRobot wiki Digital I/O Port Mapping GPIOA index 7 | digital | Configurable GPIOA digital I/O 7; input, output, pull-up input, or interrupt-capable input. | |
| PB0 | DFRobot wiki Digital I/O Port Mapping GPIOB index 8 | digital | Configurable GPIOB digital I/O 0; input, output, pull-up input, or interrupt-capable input. | |
| PB1 | DFRobot wiki Digital I/O Port Mapping GPIOB index 9 | digital | Configurable GPIOB digital I/O 1; input, output, pull-up input, or interrupt-capable input. | |
| PB2 | DFRobot wiki Digital I/O Port Mapping GPIOB index 10 | digital | Configurable GPIOB digital I/O 2; input, output, pull-up input, or interrupt-capable input. | |
| PB3 | DFRobot wiki Digital I/O Port Mapping GPIOB index 11 | digital | Configurable GPIOB digital I/O 3; input, output, pull-up input, or interrupt-capable input. | |
| PB4 | DFRobot wiki Digital I/O Port Mapping GPIOB index 12 | digital | Configurable GPIOB digital I/O 4; input, output, pull-up input, or interrupt-capable input. | |
| PB5 | DFRobot wiki Digital I/O Port Mapping GPIOB index 13 | digital | Configurable GPIOB digital I/O 5; input, output, pull-up input, or interrupt-capable input. | |
| PB6 | DFRobot wiki Digital I/O Port Mapping GPIOB index 14 | digital | Configurable GPIOB digital I/O 6; input, output, pull-up input, or interrupt-capable input. | |
| PB7 | DFRobot wiki Digital I/O Port Mapping GPIOB index 15 | digital | Configurable GPIOB digital I/O 7; input, output, pull-up input, or interrupt-capable input. |
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