4 Replies Latest reply on Sep 23, 2013 6:49 PM by userc_40792

ADCINC not working with CSD on CY8C20xx6a

userc_43050 Sep 23, 2013 6:49 PM

I am using a CY8C20436a with CSD enabled but when I try to use the ADCINC I do not get the correct result. When I remove the CSD module the ADCINC works. I have tried using the CSD_Stop command before the ADCINC conversion but that did not work either. I also tried setting the drive mode to High Z on the Cmod cap but that also did not help with the ADCINC reading. Does anyone have any ideas on getting the ADCINC working with the CSD?

1. Re: ADCINC not working with CSD on CY8C20xx6a

userc_40792 Sep 20, 2013 5:59 PM (in response to userc_43050)

        I'm not sure about CY8C20436a and
I didn't get your composition of CSD and ADCINC.
If you upload the project, someone will help you.
When uploading, use without Chrome for browser.
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2. Re: ADCINC not working with CSD on CY8C20xx6a

DaKn_263916 Sep 21, 2013 6:00 AM (in response to userc_43050)

Consider posting a tech case at -



"www.cypress.com"
"Support"
"Technical Support"
"Create a Case"




I see minimal info in TRM on ADCINC, furthermore no reference to any

interaction of Capsense and ADCINC in CSD chapter.



Regards, Dana.
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3. Re: ADCINC not working with CSD on CY8C20xx6a

userc_43050 Sep 23, 2013 2:14 PM (in response to userc_43050)
I'll try to explain the problem better. Using the cy8c20436a I am trying to read a thermister on P3.1 while also using the CSD module. I am able to get the ADC to read the thermister correctly and measure the voltage with a meter on the input pin without the CSD module placed in the project. I then place the CSD module and assign one capsense button but do not start the CSD module. After building and programming the project I no longer read the correct value on the ADCINC pin and measure 0V on that pin. It seems as though something is pulling down that pin when the CSD module is placed.

ADC_Problem.txt.zip 1,006 bytes
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4. Re: ADCINC not working with CSD on CY8C20xx6a

userc_40792 Sep 23, 2013 6:49 PM (in response to userc_43050)

        HI
total configuration is informative, through
I can't get any clue from the text
even more, I can't create 8C20436a project

Anyway, Did you use or see this Kit that contain 20436 CSD?
There are Example.zip and Setup only package.
That would be more helpful.

[ http://www.cypress.com/?rID=38222 ]
CY3280-20x66 Universal CapSense Controller Kit .
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