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Reg. VSUP Voltage, Internal Resistive Divider

Question asked by Mohan Vustepalle on Feb 15, 2017
Latest reply on Feb 16, 2017 by Radek Sestak

I am using 'MC912ZVL32' series. Need to monitor the voltage range from 9 to 16V. For that configured 10 bit ADC with ref voltage as 5V but unable to find out the internal resistive divider of VSUP to ADC.

Below are my observed values at different voltages

VBATT Voltage     VSUP voltage    ADC value

   9V                             7.82 V               201

   12V                           11.2 V               271

   16V                            15.6V              367.

Based on the above values the relation differs for the voltage and unable to find out the relation in the Reference manual.

It just mentioned as

Kindly let me know if any one knows the Internal resistive divider value.


Mohan V