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USB low-full-high speed peripherals

tayoc_1249536
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I am designing a circuit that uses the CY7C68013A as a USB peripheral controller.

I have a  question below.

1.  What is the minimum and maximum time from when the reset is released until the D+ pull-up is enabled?

According to "4.2 Enabling Pull-up on D+" in the PDF file at the URL below, it says "the FX2LP enables the pull-up on the D+ once the RESET is deasserted".

What is the minimum and maximum time from reset release until D+ pull-up is enabled?

https://www.cypress.com/file/142746/download

 

Regards.

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MallikaK_22
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Hi,

Apologies for the delay in my response.

Please refer to section 7.1.7.3, Fig 7-29 in the USB 2.0 specification.

The device should pull up the D+ line within 100ms when VBUS reaches up to 4.01V.

Regards,

Mallika

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MallikaK_22
Moderator
Moderator 250 solutions authored 500 replies posted 250 replies posted
Moderator

Hi,

Apologies for the delay in response.

Please check Table 5, Page 9 in the FX2LP datasheet: https://www.cypress.com/file/138911/download 

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tayoc_1249536
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Hi,

Thank you for reply.

Please let me know the minimum and maximum time of the ? Part of the attached image.

Regards.

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MallikaK_22
Moderator
Moderator 250 solutions authored 500 replies posted 250 replies posted
Moderator

Hi,

Apologies for the delay in my response.

Please refer to section 7.1.7.3, Fig 7-29 in the USB 2.0 specification.

The device should pull up the D+ line within 100ms when VBUS reaches up to 4.01V.

Regards,

Mallika

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tayoc_1249536
Level 1
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Hi,

Thank you for reply.

I understand that the device should pull up the D+ line within 100ms when VBUS reaches up to 4.01V.

Please let me know  the FX2LP's minimum and maximum time from FX2LP reset release until D+ pull-up is enabled?

https://www.cypress.com/file/142746/download

Regards.

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tayoc_1249536
Level 1
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Hi,

When you have time, I would appreciate more information on the progress of the question.

Regards.

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MallikaK_22
Moderator
Moderator 250 solutions authored 500 replies posted 250 replies posted
Moderator

Hi,

Apologies for the delay in my response.

FX2LP does follow the USB specification, so the maximum time from the FX2LP reset release is 100ms. The minimum time is 5ms.

Regards,

Mallika

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