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docs: revert USBFS non-ISO transfer qualification in device_issues

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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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2026-06-02 16:59:14 +00:00
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docs/reference/device_issues.rst
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@ -32,4 +32,4 @@ 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.
For USBHS devices (CH32F20x, CH32V305/CH32V307), other transfer types are protected by the ``USBHS_INT_BUSY_EN`` mechanism which holds off new transfers while an interrupt is being processed. USBFS device behavior is not fully confirmed.
Other types of transfers are not affected.