Description¶

This driver supports the Lattice POWR1220AT8 chip. The POWR1220includes voltage monitoring for 14 inputs as well as trim settingsfor output voltages and GPIOs. This driver implements the voltagemonitoring portion of the chip.

Voltages are sampled by a 12-bit ADC with a step size of 2 mV.An in-line attenuator allows measurements from 0 to 6 V. Theattenuator is enabled or disabled depending on the setting of theinput’s max value. The driver will enable the attenuator for anyvalue over the low measurement range maximum of 2 V.

The input naming convention is as follows:

The ADC readings are updated on request with a minimum period of 1s.