- Vin - this is the power pin. Since the sensor chip uses 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
- SCK - This is also the I2C clock pin SCL, connect to your microcontroller's I2C clock line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
- SDI - This is also the I2C data pin SDA, connect to your microcontroller's I2C data line. This pin is level shifted so you can use 3-5V logic, and there's a 10K pullup on this pin.
- SDO - This is also the I2C address pin ADR. Pulling this pin low to GND or bridging the solder jumper on the back will change the I2C address from 0x77 to 0x76
- STEMMA QT - These connectors allow you to connect to dev boards with STEMMA QT connectors or to other things with various associated accessories
All pins going into the breakout have level shifting circuitry to make them 3-5V logic level safe. Use whatever logic level is on Vin!
- SCK - The SPI Clock pin, it's an input to the chip
- SDO - The Serial Data Out / Microcontroller In Sensor Out, for data sent from the DPS310 to your processor.
- SDI - The Serial Data In / Microcontroller Out Sensor In pin, for data sent from your processor to the DPS310
- CS - The Chip Select pin, drop it low to start an SPI transaction. Its an input to the chip
If you want to connect multiple DPS310's to one microcontroller, have them share the SDI, SDO and SCK pins. Then assign each one a unique CS pin.