Power Pins
- VIN/5V - this is the power pin. It is a 5V-safe power input. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V.
- 3V - this is the 3.3V output from the voltage regulator, you can grab up to 500mA from this if you like.
- G - common ground for power and logic.
I2C Logic Pins
- 5CL- I2C clock pin for 5V logic, connect to your microcontroller I2C clock line. It's meant as the 5V logic input, but you can use 3-5V logic. There is a 10K pullup on this pin.
- 5DA- I2C data pin for 5V logic, connect to your microcontroller I2C data line. It's meant as the 5V logic input, but you can use 3-5V logic. There is a 10K pullup on this pin.
- 3CL- I2C clock pin for outputting 3V logic, connect to your microcontroller I2C clock line. It is level shifted to output 3V logic. There is a 10K pullup on this pin.
- 3DA- I2C data pin for outputting 3V logic, connect to your microcontroller I2C data line. It is level shifted to output 3V logic. There is a 10K pullup on this pin.
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STEMMA QT-These connectors allow you to connectors to dev boards with STEMMA QT connectors or to other things with various associated accessories.
- The connector behind the arrows on the silk is for the 5V logic input
- The connector being pointed to by the arrows on the silk is for the 3V logic output
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