The default I2C address is 0x60.
Power Pins
- VIN - this is the power pin. Since the clock generator chip may use 3 VDC, we have included a voltage regulator on board that will take 3-5VDC and safely convert it down. 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.
- 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 I2C clock line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
- SDA - I2C data pin, connect to your microcontroller I2C data line. This pin is level shifted so you 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 connectors or to other things with various associated accessories.
Clock Out Pins
- 0, 1, and 2 - These are the 3 independent clock generated outputs. They are square waves, from 0-3V.
Clock output 1 is also brought out to an SMA edge-launch connector on the other side of the PCB. You can purchase and solder on an edge-launch SMA connector if you want to pipe the signal into an RF cable.
