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                                          My PIC12F683 Development Board
Office Map Circuit diagram for each experiment may not be available separately because they are conducted with PIC12F683 development board that I made. So, the readers should first see the schematic of my development board.

Sunday, June 5, 2011

Add more I/O ports to PIC12F683 with MCP23008 port expander

PIC12F683 microcontroller has got only 6 I/O pins. We saw how to interface a standard character LCD to PIC12F683 using a 74HC595 shift register. The same technique can be implemented for interfacing a seven segment LED display. However, shift registers like 74HC595 allows to add more output ports but not any input port. MCP23008 is a GPIO port expander that can provide additional 8 port pins that can be configured as digital inputs or outputs. This tutorial describes all the details about using MCP23008 with PIC12F683 to expand its I/O capability.






1 comments:

Victoryperfect said...

Thanks for sharing, I will bookmark and be back again


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