[ABANDONED] JFlash Cypress PSoC Protection

VikramUpparpalli · May 29th 2019, 11:08pm

I am working to enable the readout protection on the cypress chips. I was able to secure the cypress chips using the psoc programmer. The factory here uses JFlash utility to enable the readout protection on the psoc chips, I was able to secure the chip protection, but wasnt able to unsecure it for reprogramming. I have been trying to use the method mentioned in the following link : wiki.segger.com/PSoC_4xxx_seri…vice_before_reprogramming.

Can i get some help on that?

Regards,
Vikram

SEGGER - Nino · Jun 13th 2019, 9:07am

Hello Vikram,

Thank you for your inquiry.
Which PSoC are you using exactly?
As stated in the Wiki article the unlock sequence is target specific and must be done by the user e.g. via a JLinkScript file.
More information about JLinkScript files can be found in the J-Link user manual.
For the target specific unlock sequence we recommend contacting Cypress support.

Best regards,
Nino

VikramUpparpalli · Jun 13th 2019, 3:20pm

It is PSoC4. The chip is CY8C4127XXX-SXXX. I have talked to cypress contacts, they havent had support for doing anything at all with JLink. I have tried setting the Unlock sequence in the init sequences, but was never able to do it.

SEGGER - Nino · Jun 13th 2019, 4:44pm

Hello,

Which J-Link software version are you using when trying to unlock?
With the latest version you should get a pop up asking if you want to unlock the device.
Do you get an unlock pop up when using the latest J-Link software version and does selecting yes unlock the device?
What OS does your production PC run?

Best regards,
Nino

VikramUpparpalli · Jun 13th 2019, 4:57pm

SEGGER - Nino wrote:

Which J-Link software version are you using when trying to unlock?

v6.46

SEGGER - Nino wrote:

Do you get an unlock pop up when using the latest J-Link software version and does selecting yes unlock the device?

Yes I get that.

SEGGER - Nino wrote:

What OS does your production PC run?

it runs linux/windows

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