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PSoC 4 MCU

New Contributor

Hello.

Where can I get a detailed document about trackpad design guide?

I found AN64846_Getting Started with CapSense.pdf but there is simple layout for trackpads.

I want to know detailed information about that (diamond pattern size, layout...). Of course document would be better.

The application is a TV remote controller.

Thanks and Regards,

YS

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Honored Contributor

Hi,

I understand you are looking for the CapSense diamond pattern.

The diamond pattern is created by the Mutual-Capacitance method.
It is supported by CSX (Mutual-Capacitance) of PSoC 4S series,
You may find the following demo kit helpful.

/* PSoC4S series pioneer kit URL */

https://www.cypress.com/documentation/development-kitsboards/cy8ckit-041-psoc-4-s-series-pioneer-kit

It contains information on diamond patterns In "CY8CKIT-041-40XX Design Files.zip".

/* CapSense Component Datasheet URL */

https://www.cypress.com/documentation/component-datasheets/psoc-4-capacitive-sensing-capsense

Describes the details of CSX (Mutual-Capasitance) in "Component - CapSense P4 V7.0.pdf".

Regards,

View solution in original post

3 Replies
Honored Contributor

Hi,

I understand you are looking for the CapSense diamond pattern.

The diamond pattern is created by the Mutual-Capacitance method.
It is supported by CSX (Mutual-Capacitance) of PSoC 4S series,
You may find the following demo kit helpful.

/* PSoC4S series pioneer kit URL */

https://www.cypress.com/documentation/development-kitsboards/cy8ckit-041-psoc-4-s-series-pioneer-kit

It contains information on diamond patterns In "CY8CKIT-041-40XX Design Files.zip".

/* CapSense Component Datasheet URL */

https://www.cypress.com/documentation/component-datasheets/psoc-4-capacitive-sensing-capsense

Describes the details of CSX (Mutual-Capasitance) in "Component - CapSense P4 V7.0.pdf".

Regards,

View solution in original post

Honored Contributor

Additional Infomation

The Getting Started with CapSense.pdf describes the CSD (Self-Capacitance method).

Generally, regarding the capacity of the sensor,
Self-capacitance method up to about 60pF.
Mutual-capacitance method up to about 200pF.

These depend on the size, wiring and material of the sensor.

For example,

64-mil, FR4, 2 layer board, a 7-mil thick, 1-inch long copper pattern corresponds to approximately 2 pF parasitic capacitance.

I hope it helps you.

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New Contributor

Thanks for your reply.

Regards,

YS

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