IO Expander

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Revision as of 17:11, 21 March 2014 by Tom (talk | contribs)
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general info

Based on the MCP23008 (I2C) or MCP23S08 (SPI) IO expander chips from Microchip.
http://ww1.microchip.com/downloads/en/DeviceDoc/21919e.pdf

I2C address:
0100 000 tru 0100 111 (jumper selectable)

SPI address:
0100 000 tru 0100 011 (jumper selectable)

physical dimensions

  • Board outline: 50x25mm
  • Mounting hole diameter: 3mm
  • Mounting hole pitch: 44x19mm (3mm from board edge)

using the board

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