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PSoC 4 MCU

Contributor II

無題.png

Below, the same sentences are written in English and Japanese.

・English
AN 88619 PSoC 4 Hardware Design Considerations states "large sink current".
What is the specific mA for "large sink current"?

・日本語(Japanese)
AN88619 PSoC 4 Hardware Design Considerations に「large sink current」と記載あります。
「large sink current」は具体的に何mAでしょうか?

Regard

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1 Solution
Moderator
Moderator

Hi

The maximum current is defined for a port to which the CapSense is connected.

The total port current should not exceed 40 mA while the CapSense block is scanning the sensor. Please refer to CapSense Design guide, sensor and device placement section for more details.

Link : https://www.cypress.com/file/46081/download

pastedImage_1.png

It is also not recommended to route any high speed switching lines close to the CapSense sensor pins or traces due to introduction of crosstalk which might lead to inaccurate results.

Do let us know in case of any further clarification.

Thanks and regards

Harigovind

View solution in original post

2 Replies
Moderator
Moderator

Hi

The maximum current is defined for a port to which the CapSense is connected.

The total port current should not exceed 40 mA while the CapSense block is scanning the sensor. Please refer to CapSense Design guide, sensor and device placement section for more details.

Link : https://www.cypress.com/file/46081/download

pastedImage_1.png

It is also not recommended to route any high speed switching lines close to the CapSense sensor pins or traces due to introduction of crosstalk which might lead to inaccurate results.

Do let us know in case of any further clarification.

Thanks and regards

Harigovind

View solution in original post

Contributor II

Harigovind-san

Thank you for your answer.

Regards

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