Hello experts,
I am working on i.MX93 ADC and trying to read ADC using cortex-m33 mcu. In that I have checked almost all the registers related to ADC but unable to find Vref selection or configuration related register.
1. Here what I want to know is that what is the voltage value of my Vref ?
2. How this Vref is selected by ADC, is there any dedicated register available to set Vref ?
P.S: I am able to read ADC value from PCDR register but just confusion is that how vref is selected by ADC.
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Hello,
Yes, that it correct.
To use SAR ADC, a calibration/self-test must be performed after every power-up reset. This will check the supply voltage, reference voltage and calibrated values to warranty a correctly functionality.
Best regards.
Hello,
Vref = VDD_ANAx_1P8.
The range is from 1.71 V to 1.89 V.
Best regards.
Hi JorgeCas,
Thanks for comment.
1. Does it mean that I don't need to any configuration related Vref in my coretx-m33 driver code. right? ADC will automatically derive VREF from VDD_ANAx_1P8?
Hello,
Yes, that it correct.
To use SAR ADC, a calibration/self-test must be performed after every power-up reset. This will check the supply voltage, reference voltage and calibrated values to warranty a correctly functionality.
Best regards.