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CYUSB3014: status of GPIO during the HW reset
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RSKV

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CYUSB3014: status of GPIO during the HW reset

Stas1967 posted on 25 Jun 2012 9:13 PM PST
Member
8 Forum Posts

Hi,

What is the status of GPIO during the HW reset and right away after HW reset and before firmware will run

Thank you

Re: CYUSB3014: status of GPIO during the HW reset

aasi posted on 25 Jun 2012 09:55 PM PST
Cypress Employee
1073 Forum Posts

 http://www.cypress.com/?app=forum&id=167&rID=61087

Re: CYUSB3014: status of GPIO during the HW reset

Stas1967 posted on 26 Jun 2012 10:28 PM PST
Member
8 Forum Posts

From there I understand that part of GPIO is tri-state and part not. Is it true? If "yes" can you provide me document which is describe whole picture for every GPIO?

Thank you

Re: CYUSB3014: status of GPIO during the HW reset

RSKV posted on 27 Jun 2012 05:45 AM PST
Cypress Employee
655 Forum Posts

The link of the thread that was mentioned above, talks about the status of GPIOs when bootloader is running.

During hard reset, all GPIOs will be tristated. This point will be mentioned in the new revision of the data sheet.

Regards,

sai krishna.

Re: CYUSB3014: status of GPIO during the HW reset

gregl posted on 27 Jun 2012 03:52 PM PST
Member
3 Forum Posts

Does this apply to all bootloader modes, or just when booting from USB?

Specifically I would like to know if any other pins are driven during SPI boot.

 

Re: CYUSB3014: status of GPIO during the HW reset

RSKV posted on 27 Jun 2012 06:49 PM PST
Cypress Employee
655 Forum Posts

Yes. In all conditions.

Re: CYUSB3014: status of GPIO during the HW reset

gregl posted on 28 Jun 2012 10:04 AM PST
Member
3 Forum Posts

Wow.

I appreciate the fast support.

But the state of the documentation, the approach with the API wrapper, it all makes me quite uncomfortable.  I think in a few years, Cypress should talk to the engineers at its high volume FX3 customers - not to defend its approach on the FX3 but to listen to what the customers have to say.

Re: CYUSB3014: status of GPIO during the HW reset

RSKV posted on 28 Jun 2012 08:43 PM PST
Cypress Employee
655 Forum Posts

Hi gregl,

Thanks for your the valuble feedback.

I am sure that Cypress will do that at some point in future.

Anyways, I would like to get more detailed feedback from you on both documentation and the approach with the API wrapper.

We would like to take your feedback and see if we can do something in the meantime to serve you better.

Please share your valuable inputs to us.

Regards,

sai krishna.



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