Difference between revisions of "I/O Expander Shield with MCP23017"
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==Schematics== | ==Schematics== | ||
*[http://cnlearn.linksprite.com/wp-content/uploads/2014/04/io-expander-shield-SCH.pdf Schematic] | *[http://cnlearn.linksprite.com/wp-content/uploads/2014/04/io-expander-shield-SCH.pdf Schematic] | ||
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| + | ==Resources== | ||
| + | *[http://ww1.microchip.com/downloads/en/DeviceDoc/21952b.pdf Datasheet] | ||
Revision as of 09:54, 10 April 2014
Description
I/O Expander shield is a shield used to expand the number of I/Os of an Arduino Uno. It is based on the chipset MCP23017. The chipset MCP23017 communicates with Arduino Uno through I2C interface. It adds GPIOA and GPIOB, a total of 16 I/Os. There are two LEDs and two buttons on the shield. User can decide if they want to use the built-in LED/buttons or not by using the 4-bit DIP switch.
