ADC connected to a OA[1].vplus

[CeGu_1509311]

Hello everyone,

   

I want to connect a potentiometer to the SARMUX module, but using the port P2[5] the PSoC creator shows a warning about using this pin may lead to routing congestion or failure.

   

Anyone could tell me if you have tried this and which type of error can I expect?

       

Regards

[Bob_Marlowe]

To use Port P2_5 seems to be quite normal, can you post your complete project, so that we all can have a look at all of your settings? To do so, use
Creator->File->Create Workspace Bundle (minimal)
and attach the resulting file.

       

Bob

[HeLi_263931]

Probably this pin is used as dedicated connection for some component. Without the actual part number its difficult to say, but probably the error message already tells you why (if not, look at the design wide resources which shows for each pins whats its used for).

[rola_264706]

I don't have your files but I tried it on this example program and had no issue with
​P2(5).  I am sending the program for you to study.
​

[HeLi_263931]

OA[1].vplus is the positive input of the second OpAmp. It is routed to P1[5]. Are you sure you are using the correct pin? Are you using this OpAmp maybe (e.g. as input buffer)?

[CeGu_1509311]

Hi,

       

Im using the SAR MUX as an ADC, and I'm getting this warning when I use PSoC Creator 3.3, PSoC Creator 3.2 work great without warnnings

[HeLi_263931]

I tested a similar schematic with Creator 3.3, and all was fine. Which PSoC do you use? Can you share the project that shows this behavior?