9.2.3 BMP280 (Pressure I2C)
This part is BMP280 I2C/SPI pressure and temperature sensor. The temperature range is -40 to 85 °C and the pressure range is 300 hPa to 1100 hPa.
To select SPI mode put low level in CSB pin. In I2C mode (CSB pin high), the address is 0x77 when SDO is NC or high and 0x76 when SDO pin is held in low.
