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capsensor with analog mux | Cypress Semiconductor

capsensor with analog mux

Summary: 1 Reply, Latest post by HIMA on 29 Jul 2015 12:05 AM PDT
Verified Answers: 0
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kkadin's picture
6 posts

hi there.


I would like to use a circle type electrode as both button type capsensor and other use. 

so, I tried use a amux to change path to the circle type electrode.


if amux set 0, the path is ( first setting ) 

CapSense_CSD -> mux -> the circle type electrode

if amux set 1, the path is ( second setting )

another circuit -> mux -> the circle type electrode 


the problem is.. when i use the first setting the capsensor button shows always ON state. 

when mux is disabled,  capsensor works fine. so I think activated mux should changes capsensor working condition.


I have thought that the mux is just switch.... the above condition says another properties of mux must be exist..




HIMA's picture
Cypress Employee
169 posts

Hello Kakadin,


Is it possible for you to give more information. Please give us your schematic and project.




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