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sensor:mcp23017 [2026/02/12 21:57] – vamsansensor:mcp23017 [2026/02/12 21:58] (current) – vamsan
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 ====== lamaPLC: MCP23017 / MCP23S17 16-Bit I/O Expander with Serial Interface I²C / SPI ====== ====== lamaPLC: MCP23017 / MCP23S17 16-Bit I/O Expander with Serial Interface I²C / SPI ======
 +{{ :sensor:mcp23017_1.png?160|MCP23017}}
 The MCP23017/MCP23S17 (**MCP23X17**) (**CJMCU-2317**) device family provides 16-bit, general-purpose parallel I/O expansion for [[com:basic_i2c|I²C]] bus or [[com:basic_spi|SPI]] applications. The two devices differ only in the serial interface: The MCP23017/MCP23S17 (**MCP23X17**) (**CJMCU-2317**) device family provides 16-bit, general-purpose parallel I/O expansion for [[com:basic_i2c|I²C]] bus or [[com:basic_spi|SPI]] applications. The two devices differ only in the serial interface:
   * MCP23017 – I²C interface   * MCP23017 – I²C interface