The Vref voltage for PSOC "4000S"

[NoAr_1540581]

I would like to know
the Vref value for "CSX" Sensing Method, and they are using PSOC “4000S” series.

We are referring the
AN85951 3.1.1.2 CSX Sensing Method, and the VREF voltage is 1.2V. Is it ok to
think that the VREF voltage is fixed at 1.2V for PSOC 4000S?

Best Regards

Arai

[SrikanthD_56]

Hi Arai,

V_REF for PSoC 4000S (PSoC 4 S-Series) can vary from 0.6 V to V_DDA – 0.6 V.

Please check out this KB article for details VREF of PSoC 4 CapSense Component - KBA220609

[Anonymous · Accepted solution]

The VREF for CSX sensing method in PSoC 4000S device is by default set to 1.2V.

[SrikanthD_56]

Oh, I see. Thanks for clarification dche​

[Anonymous]

However, you can always change VREF to the value you mentioned by editing the REFGEN register. But, VREF value has no direct impact for mutual cap sensing.