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From 8 to 32 bits: ARM Microcontrollers for Beginners (4)

The SERCOM module in I²C mode

From 8 to 32 bits: ARM Microcontrollers for Beginners (4)
This time we will look at the second of the three possible interfaces the SERCOM module is able to implement, I2C. For our first experiments with I2C we will use a readily-obtainable low-cost device that is easy to control but which nevertheless has a wide range of applications: the MCP23017 port expander, offering 16 GPIOs.
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