* To start a conversion first we must pull down CE pin.
* The ADC starts a convertion and keeps the DV pin high until the end.
* At this point, we can read the conversion value by SPI.
* The convertion result is yield in 3 bytes.
* To start a conversion first we must pull down CE pin.
* The ADC starts a convertion and keeps the DV pin high until the end.
* At this point, we can read the conversion value by SPI.
* The convertion result is yield in 3 bytes.