This 64 GPIO board provides a 64 channel digital expansion designed for use on the Raspberry Pi. The board is based around the MCP23s17 16-bit I/O expander from Microchip Technology Inc.

Features:

• Four MCP23s17 expanders are included on the board allowing you to connect up to 64 digital inputs or outputs to the Raspberry Pi. The 64 GPIO Board is powered through the host Raspberry Pi using the GPIO port and extended pins on the GPIO connector allow you to stack the 64 GPIO along with other expansion boards.
• 64 LEDs that show the status of the GPIO

Technical specifications:

• 23s17 U13, U14 with GPIO Port A and B
• Output of each GPIO to 2x10 pin:
• Bank B (1-10) GPIO (0, 1, 2, 3, 4, 5, 6, 7, GND, INTB)
• Bank A (1-10) GPIO (0, 1, 2, 3, 4, 5, 6, 7, GND, INTA)
• JP18 GA0 ~ GA7 (U13 Port A)     JP19 GB0 ~ GB7 (U13 Port B)
• JP25 AA0 ~ AA7 (U14 Port A)     JP24 BA0 ~ BA7 (U14 Port B)
• JP20 GC0 ~ GC7 (U15 Port A)     JP21 GD0 ~ GD7 (U15 Port B)
• JP22 DA0 ~ DA7 (U16 Port A)     JP23 EA0 ~ EA7 (U16 Port B)
• R61, R62, R63 (for U13 address select A0, A1, A2)
• R64, R65, R66 (for U14 address select A0, A1, A2)
• R80, R81, R82 (for U15 address select A0, A1, A2)
• R88, R89, R90 (for U16 address select A0, A1, A2)
• U13 (20) 23017 -1 Port A, B     U14 (21) 23S17-2 Port A, B
• U15 (22) 23017 -3 Port A,B      U16 (23) 23S17-4 Port A, B
• 23s17 Datasheet
  

Demo software:

• 23s17-cs0.py     23s17-cs1.py
• 23s17-4port-v3.py     23s17-4port-s-v103.py
• 23s17-4port-GUI.py   red.png   green.png   (download these three files together)