PSoC 4 GPIO termination

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NaJa_4363881
Level 3
Level 3
10 replies posted 10 questions asked 5 replies posted

Hello,

I am designing a prototype board with PSoC 4 WLCSP package device (CY8C4014FNI-421AT). I went through the sample schematics for CY8CKIT-040 and also checked the Technical Reference manual for the device family, but I am not sure on how to terminate unused GPIO pins such as the Trigger Input pin (In my case P 0.2).

For now, I have simply left the unused GPIO pins suspended, but I am not sure about these Trigger input pins that can also be used as CDS sense or as shield pins that are connected to AMUXBUS A or B.

It will be great if someone could advise me regarding this concern.

Thanks and Regards,

Nandhini Jayapandian

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MotooTanaka
Level 9
Level 9
Distributor - Marubun (Japan)
First comment on blog Beta tester First comment on KBA
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MotooTanaka
Level 9
Level 9
Distributor - Marubun (Japan)
First comment on blog Beta tester First comment on KBA

Hi,

I think that the following topic is a good reference.

unused pin configured internal pull up pull down

Not directly related, may be a good information

https://www.cypress.com/documentation/application-notes/an88619-psoc-4-hardware-design-consideration...

moto

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