Datasheet

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6. Port Expander
Figure 6-1:
Port Expander
mikromedia+ for PIC32MX7
®
features a 16-bit I/O port
expander module MCP23S17 which
communicates with PIC32MX795F512L
microcontroller via SPI serial interface. This
module enables you to expand the number of
microcontroller I/O pins with two 8-bit I/O ports (PORTA
and PORTB). Each of them consists of registers for input, output
and polarity selection. In addition, the MCP23S17 module contains
interrupt and reset pins and has 25mA sink/source capability per I/O pin.
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