NXP TOUCH SENSE SOLUTION

[luosui]

请问这两张原理图是属于自容式方案还是互容式方案

[danielmartynek]

Hi @luosui,

Which two schematics do you compare here?

Thanks,

BR, Daniel

[luosui]

Hi,Daniel:

Here are the SCH files,Can you tell which kind of cap sensing tech they are using? Please inform me the answer,Thank you,BR.

[danielmartynek]

Hello @luosui,

The S32K144 does not have any dedicated touch sense peripheral module, that is why the HW implementation uses GPIO + ADC and two pins per an electrode .

Whereas the KE1xZ MCU has a dedicated TSI module.

Regards,

Daniel

[luosui]

Hi，Daniel
According to your description:

1. The S32K144 uses GPIO + ADC and two pins per an electrode ,it is self cap sense tech,right?

2. And the KE1xZ MCU has a dedicated TSI module,so it only need one ADC pin and one electrode to fulfill touch sense function.

Regards,

luo sui

[danielmartynek · Accepted solution]

Hi Luo Sui,

Yes, that is correct.

[luosui]

Tkanks，BRO，help a lot ！