I2C interface control, only two signal lines are needed to expand 16 I/O ports. I2C communication address can be set, short circuit A0/A1/A2 solder joints can change communication address. Provide two interface types of PH2.0 terminals and pads that support parallel connection of multiple I2C modules. Onboard voltage converter, compatible with 3.3V/5V levels Packaging content: MCP23017 IO Expansion Plate x1, PH2.0 20cm 6Pin x1.
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