MCP23X08 8-bit GPIO Expander Evaluation Board
The MCP23X08 8-bit GPIO Expander Evaluation Board demonstrates simple input/output functionality of the MCP23008 (I2C interface) and the MCP23S08 (SPI interface). The system demonstrates the simplicity of monitoring four inputs and applying the level to associated outputs.
The MCP23008/MCP23S08 Evaluation Board is designed to demonstrate simple, low-cost input/output expansion using the MCP23X08 devices and a 6-pin PIC10F202 Microcontroller (MCU). Four MCP23X08 pins are configured as inputs and four as outputs. When an input level is changed, the associated output pin is driv en to the same level. This is accomplished by the MCU reading the input pins and writing the appropriate value to the output pins. The MCP23X08 are provided in small, space-saving 20-lead SSOP packages. Adding the small 6-lead PIC10F202 device in a SOT-23 package makes for small overall PCB area.
Key Applications: GPIO Extender
Features
- Demonstrates the MCP23X08 devices in a simple I/O application
- Includes two I/O expanders that are switch selectable: the MCP23008 with I2C interface and the MCP23S08 with SPI interface
- ICSP header for the PIC10F202 allows users to customize firmware to further evaluate the MCP23X08
- Jumpers and headers allow the MCP23X08 to connect directly to custom applications for prototype work
- Can be powered from a 3.0V to 5.5V DC power source (connected to the +5V and GND test points)
Ships With
- One MCP23008/MCP23S08 Evaluation Board
- MCP23008 GPIO Expander with I2C interface (installed)
- MCP23S08 GPIO Expander with SPI interface (installed)
- MCP23008/MCP23S08 Data Sheet (DS21919) (Electronic Version on CD)
- MCP23008/MCP23S08 Evaluation Board User’s Guide (DS51530) (Electronic Version on CD)