16-bit I/O expander with SPI clock speeds up to 10 MHz 16 GPIO pins divided into two 8-bit ports Selectable hardware address using jumpers For 5V systems
The Port Expander Board includes an MCP23S17 I/O expander with SPI clock speeds up to 10 MHz for higher-throughput applications. Three Hardware Address Selection jumpers allow you to configure the board's address and connect up to eight devices on the bus. The controller also supports interrupt-on-change. This board is convenient for adding 16 GPIO pins to your device.
The board connects to a host microcontroller system through any one of three 2×5-pin headers on the left side of the board, each with a different pinout which makes the board plug-in compatible with various development systems by mikroElektronika using the supplied IDC10 cable. The expanded ports are available via two 2×5-pin headers on the right side of the board.
Example Usage The following image shows the Port Expander Board being used to connect two peripheral modules to a single I/O port header on a development system.
Note: This board is designed for 5V systems only.
Port Expander Board Resources
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