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USB Superspeed Peripherals

MaAr_2545856
New Contributor II

GPIF 32 bit interface does not work with 54MHz. Are there any limitations to the clock frequency that can be used with 32 bit DQ width?

When we use 16bit interface to send video to UVC with PCLK up to 104MHz it works well. The 32-bit interface works with 27MHz. But it does not work well with a 32-bit interface with 54MHz. Kindly confirm is there any clock limitations for a 32-bit interface.

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KandlaguntaR_36
Moderator
Moderator

>> 1. We generated a test pattern data "12345678". When we cross verified with USBlyzer data received was "02345678".

>> 2. We generated a test pattern data "FFFFFFFF". When we cross verified with USBlyzer data received was "AFFFFFFF".

If this is the case, we can say that 962x766@60fps, PCLK54MHz is working but there is a error is received data.

As per the above two lines, it looks like first four bits are being sampled wrong.

Can you please send 0FFFFFFF pattern and confirm this?

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