Device specific known issues and workarounds¶

This page lists known issues and workarounds for specific devices.

NXP LPC54600¶

Severity: High

Not recommended for USB device applications (except high-speed host controller)

The LPC54600 series have a very buggy USB controller, with 17 issues listed in the errata which is more than half of the total issues.

Most severe issues are:

USB.2: In USB high-speed device mode, the NBytes field is not correct after BULK IN transfer
USB.5: In USB full-speed host mode, linked list on done queue is broken.
USB.15: USB high-speed device in endpoint TX data corruption

WCH CH32F20x/CH32V20x/CH32V30x¶

Severity: Medium

Not recommended for USB audio applications

Reference: CH32V30X Reference Manual USBFS/USBHS controller chapter

Data corruption may occur on isochronous endpoints. Due to the lacking of FIFO for interrupt status registers, later completed transfer will overwrite INT_ST and RX_LEN register if previous transfer processing is not completed.

Other types of transfers are not affected.