Programming CY8C4125AXI-S433

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hesc_1314511
Level 3
Level 3
10 sign-ins First solution authored 10 replies posted

Hello, I am programming CY8C4125AXI-S433 with KitProg3 (CMSIS-DAP/BULK/0B0B0F3C01346400, but only with 3.3V not 5V.

Can you help me?

Thanks

Henry

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1 Solution

Hi Henry,

I understood your query.

The VCCD pin of the device is the output of internal regulator. So the VCCD pin should not be connected to the power supply. Also, the decoupling capacitor on the VCCD pin shold be 0.1uF for the device family that you are using. Please refer page number 13 of the device datasheet for the information about decoupling capacitor.

https://www.cypress.com/file/230626/download

So please remove 5volt supply connection on the VCCD pin and connect 0.1uF decoupling capacitor instead of 1uF decoupling capacitor.

Hope this solves your issue !

>>"and how can I change USB 5V fixed voltage of my programmer."

--> As Noriaki mentioned in response#2, you can remove the diode connection between VBUS and VTARG. In this case the Kitprog will not power the psoc that you are going to program.

Thanks

Ganesh

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