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Restore original "Other types of transfers are not affected" statement, removing the conditional USBHS_INT_BUSY_EN / USBFS-unconfirmed wording. Co-authored-by: Zixun LI <HiFiPhile@users.noreply.github.com>
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Device specific known issues and workarounds
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This page lists known issues and workarounds for specific devices.
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NXP LPC54600
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**Severity: High**
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**Not recommended for USB device applications (except high-speed host controller)**
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Reference: `LPC54600 Errata Sheet`_
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.. _LPC54600 Errata Sheet: https://www.nxp.com/docs/en/errata/ES_LPC546XX.pdf
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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.
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Most severe issues are:
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- USB.2: In USB high-speed device mode, the NBytes field is not correct after BULK IN transfer
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- USB.5: In USB full-speed host mode, linked list on done queue is broken.
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- USB.15: USB high-speed device in endpoint TX data corruption
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WCH CH32F20x/CH32V20x/CH32V30x
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---------------------------------
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**Severity: Medium**
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**Not recommended for USB audio applications**
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Reference: `CH32V30X Reference Manual`_ USBFS/USBHS controller chapter
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.. _CH32V30X Reference Manual: https://www.wch-ic.com/downloads/CH32FV2x_V3xRM_PDF.html
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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.
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Other types of transfers are not affected.
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