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LPC1837 dual high speed USB issue

Question asked by Lidou He on Feb 20, 2017
Latest reply on Mar 22, 2018 by Kevin King

Hello, I want to implement the dual high speed USB data transmission via LPC1837JET256. But neither of the two USB ports can work properly. Both of the two USB controllers are acting as host and they can actually detect the insertion of the device. However, they can't enumerate the device properly. It seem the chip sends the repuest in a wrong way, so the device give no response. I used the official demo program and still got the same issue. The attachments are the schematic and the enumeration process captured by Beagle USB 480. 

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