Power Pins

  • Vin - The chip can safely run from 3-5VDC. 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
  • GND - common ground for power and logic

I2C Logic Pins:

  • SCL - This is the I2C clock pin SCL, connect to your microcontroller's I2C clock line. There's a 10K pullup on this pin.
  • SDI - This is the I2C data pin SDA, connect to your microcontroller's I2C data line. There's a 10K pullup on this pin.
  • STEMMA QT - These connectors allow you to connect to dev boards with STEMMA QT connectors or to other things with various associated accessories

Other Pins:

  • GPO - General Purpose Output pin. This is a configurable output pin used to provide RF activity information to an external device. Note: Requires an external pullup resistor (> 4.7 KΩ) to operate. The interrupt consists in pulling the state to a low level or outputting a low-level pulse on GPO pin.
  • VEH - This analog output pin is used to deliver the analog voltage VEH available when the Energy harvesting mode is enabled and if the RF field strength is sufficient. Note: Energy harvesting voltage output is not regulated.

This guide was first published on Aug 10, 2020. It was last updated on Aug 10, 2020.

This page (Pinouts) was last updated on Apr 14, 2021.

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