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Amazon.com: MCP23017 IO Expansion Board I2C Interface 5V/3.3V Voltage Expands 16 I/O Pins 8pcs of Boards can Stack to Use at The Same Time up to 128 I/O Pins Allows Multi I2C
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GPIO Mux Values, I2C Problems SCL and SDA Pins - C2000 microcontrollers forum - C2000™︎ microcontrollers - TI E2E support forums
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