CY7C65640-LFC vs CY7C65640-LFCX-E

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melac_4002756
Level 1
Level 1

there is OEM usb hub board that use IC CY7C65640-LFC  to be usb controller and we found usb intermittent  lost communication  for many time then take board out to check don't see any component bad. looking datasheet of CY7C65640-LFCX-E there is many improvement. can anyone share idea for what possible root cause for lost communication from CY7C65640-LFC  and how to fix to improve reliability.

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Sananya_14
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello,

Please attach USB traces with a software or hardware analyzer when the failure occurs in the communication. Does the issue occur every time?

You can refer to the Application Note-https://www.cypress.com/file/122726/download which is HX2VL hardware guidelines but can be used as a schematic review guide for HX2LP as well.

Best Regards,

Sananya

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Sananya_14
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello,

Please attach USB traces with a software or hardware analyzer when the failure occurs in the communication. Does the issue occur every time?

You can refer to the Application Note-https://www.cypress.com/file/122726/download which is HX2VL hardware guidelines but can be used as a schematic review guide for HX2LP as well.

Best Regards,

Sananya

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