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GPIF Data Transfer Failure during ZLP – KBA90259

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GPIF Data Transfer Failure during ZLP – KBA90259

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Question: Why does the GPIF data transfer fail during a zero-length packet (ZLP)?

 

Answer:

Some data transfer errors may be seen if a ZLP is followed very quickly (for example, within one microframe or 125 μs) by another data packet on a burst-enabled USB IN endpoint operating at Super Speed.
The solution is to ensure that you allow some time to elapse between a ZLP and the next data packet on burst-enabled USB IN endpoints.

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Last update:
‎Jan 29, 2014 11:43 PM
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