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STD MCP23017 Breakout Module
License: CC-BY-SA 3.0
Mode: Editors' pick
- 3
Update time：
2023-01-07 03:57:15
Creation time：
2016-07-22 21:42:32
Description
A simple breakout module for the MCP23017 (http://www.microchip.com/wwwproducts/en/MCP23017). I designed this to expand the number of GPIO pins for my Raspberry Pi for use on my Boeing 737 Overhead Panel Project.
Features:
* In and Out I2C and Power headers, to allow easy daisychaining.
* voltage divider (5V to 3V) for INT signal to be fed back to Raspberry Pi GPIO
* jumpers to set I2C address
* current limiting resistors for each GPIO
* GND pin for each GPIO
* Extra connection pins for each GPIO (useful for matrix connections)
P1 - Connections to Microcontroller.
P2 - Connections to downstream MCP23017.
P3 - I2C address selection.
R3-R18 - Current limiting resistors.
P6 - GND pins
P7 - GPIO pins
(P8-P10) - extra connections for GPIO Pins.
Design Drawing
schematic diagram
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | SIP5 | P1 | HDR1X5 | 1 |
| 2 | SIP4 | P2 | HDR1X4 | 1 |
| 3 | SIP3 | P3,P4,P5 | HDR1X3 | 3 |
| 4 | SIP16 | P6,P7,P8,P9,P10 | HDR1X16 | 5 |
| 5 | 1k | R1,R3,R4,R5,R6,R7,R8,R9,R10,R11,R12,R13,R14,R15,R16,R17,R18 | R3 | 17 |
| 6 | 1.5k | R2 | R3 | 1 |
| 7 | MCP23017SP | U2 | DIP28-300 | 1 |
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