5.12.4 Fixed Voltage Reference Data
The Fixed Voltage Reference, or FVR, is a stable voltage reference, independent of
VDD, with 1.024V, 2.048V or 4.096V selectable output levels. The output
of the FVR can be configured to supply a reference voltage to the following:
- ADC input channel
- ADC positive reference
- Comparator positive input
- Digital-to-Analog Converter
For more information on the FVR, refer to the “Fixed Voltage Reference (FVR)” chapter.
The DIA stores measured FVR voltages for this device in mV for the different buffer
settings of 1x, 2x or 4x at program memory locations 8118h to 811Dh.
- FVRA1X stores the value of ADC FVR1 Output Voltage for 1x setting (in mV)
- FVRA2X stores the value of ADC FVR1 Output Voltage for 2x setting (in mV)
- FVRA4X stores the value of ADC FVR1 Output Voltage for 4x setting (in mV)
- FVRC1X stores the value of Comparator FVR2 Output Voltage for 1x setting (in mV)
- FVRC2X stores the value of Comparator FVR2 Output Voltage for 2x setting (in mV)
- FVRC4X stores the value of Comparator FVR2 Output Voltage for 4x setting (in mV)