The default I2C address is 0x13.

Power Pins

• VIN - this is the power pin. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V micro like Arduino, use 5V
• 3Vo - this is the 3.3V output from the voltage regulator, you can grab up to 100mA from this if you like
• GND - common ground for power and logic

I2C Logic Pins

• SCL - I2C clock pin, connect to your microcontroller's I2C clock line. This pin can use 3-5V logic, and there's a 10K pullup on this pin.
• SDA - I2C data pin, connect to your microcontroller's I2C data line. This pin can use 3-5V logic, and there's a 10K pullup on this pin.
• STEMMA QT - These connectors allow you to connectors to dev boards with STEMMA QT (qwiic) connectors or to other things with various associated accessories

Other Pins

• INT - This is the interrupt pin. You can setup the VCNL4020 to pull this low when certain conditions are met such as proximity or lux level thresholds being crossed.
• CATH - At the top of the board, to the right of the VCNL4020 label on the silk, is the IR LED cathode pin. The IR LED cathode needs no external connection since the necessary connections to the driver are done internally.

Power LED and LED Jumper

• Power LED - In the upper left corner, above the STEMMA connector, on the front of the board, is the power LED, labeled on. It is a green LED.
• LED jumper - This jumper is located on the front of the board, to the right of the power LED. Cut the trace on this jumper to cut power to the "on" LED.