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8-Bit SPI I/O Expander with Serial Interface
Overview
- Max. Bus Frequency [kBits/s]:10000
- Operating Voltage [V] Max:5.5
- Operating Voltage [V] Min:1.8
- TempRange [°C] Max:125
- TempRange [°C] Min:-40
- 8-bit port expander with interrupt output
- 2 address inputs for up to 4 devices on one bus
- 25mA sink/source capability per I/O
- Supports up to 10MHz SPI™ clock speeds
- Internal power-on-reset (POR)
The MCP23X08 device provides 8-bit, general purpose, parallel I/O expansion for I2C bus or SPI applications. The two devices differ in the number of hardware address pins and the serial interface:
• MCP23008 – I2C interface; three address pins
• MCP23S08 – SPI interface; two address pins
The MCP23X08 consists of multiple 8-bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.
• MCP23008 – I2C interface; three address pins
• MCP23S08 – SPI interface; two address pins
The MCP23X08 consists of multiple 8-bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.
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Tools And Software
Demo & Evaluation Boards
| Tools |
|---|
 The GPIO Expander Keypad and LCD Demo Board is designed to demonstrate the use of the MCP23S08/17 (SPI interface) and the MCP23008/17 (I2C interface) devices in a keypad and LCD example.
|
| The MCP23X08 8-bit GPIO Expander Evaluation Board demonstrates simple input/output functionality of the MCP23008 (I2C interface) and the MCP23S08 (SPI interface).
|
| The PICkit™ Serial SPI Demo Board was designed to easily connect to the PICkit Serial Analyzer (DV164122). |
["developmentenvironment","Development Environment"] ,
["emulators","Emulator and Debuggers"] ,
["demoevaluationboards","Demo & Evaluation Boards"] ,
["programmerrelations","Programmers"] ,
["thirdpartytools","3rd Party Tools"] ,
["legacy","Legacy"] ,
["softwarelibraries","Library and Firmware"]
referencedesigns,Reference Designs:
codeexamples,Code Examples:
ibisboarddesignfiles,Board Design Files: