PSoC4S Plus : Accuracy of ECO used for PSoC4S Plus

[MiNe_85951]

Dear Sirs and Madams,

Please tell us about the accuracy of ECO used for PSoC4S.

We are currently using 24MHz external clock for my PSoC4S(CY8C4126AXI-S445).

(1)

The frequency setting described in Architecture TRM is "24MHz ≧ f > 17MHz".

Please tell us the acceptable ECO accuracy for this specified upper limit of 24MHz.

(2)

If I exceed  the specified upper limit of 24MHz, will it affect the operation of PSoC4S?

Regards,

[Sidramesh_S]

Hi @MiNe_85951 ,

I am looking into the documents.

You can refer to the below document section 7. Cypress Recommendations for External Crystal Oscillator (ECO) for more details on ECO.
https://www.infineon.com/dgdl/Infineon-AN95089_PSoC_4_PRoC_BLE_Crystal_Oscillator_Selection_and_Tuni...

Thanks and regards,
Sidramesh

[MiNe_85951]

Sidramesh-san,

Thank you for your support.

I have already reviewed this application note.

However, I thought that the content described in this application note was information about BLE devices.

Does it have to be within the below +/- 20ppm listed in Session 7 even for PSoC4 devices without BLE?

Regards,

[Sidramesh_S]

Hi @MiNe_85951 ,

If your ECO is more accurate than IMO then no problem ECO frequency should be between 4 to 33MHz.

If it is less accurate then there are timing constraints for some blocks you have to make sure of that much accuracy.

Thanks and regards,
Sidramesh