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Overwrite Enable/Disable in ADC of MPC5643L

Question asked by Arthi Venkatasubramanian on Oct 22, 2018
Latest reply on Oct 24, 2018 by Arthi Venkatasubramanian

Hi Everyone,

I just tried a simple ADC conversion using MPC5643L controller with overwrite enabled and overwrite disabled.In both cases, I am able to view the changes in the converted data of the analog channels (CDRn) registers.As I vary the input voltage, the corresponding data is monitored in both cases. 


I just want to know the difference between ADC measurement with overwrite enabled and overwrite disabled?


As far as I know, Overwrite enable will helps to overwrite the old conversion results with the new one.But in my case,

for both overwrite enabled and disabled, New results are getting updated.Whether I understood correctly?


Can anyone explain with an example?


what is the impact of having overwrite in ADC?


Kindly answer my question. I know its a simple one. But I want to know the use case of overwrite.




Arthi Venkatasubramanian