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A.2 Notes

(1) Close stream registered transfer function

If the stream is closed immediately after the transfer function returns (-1), the stream system will continue to call the transfer function until the transfer function returns a value of 0 or more. Return a value greater than or equal to 0 when the transfer is complete.

(2) A-Bus access prohibited during SCU-DMA transfer

When the transfer mode is STM_TR_SCU, or when SCU-DMA is started with a transfer function, only the following functions can be used during the transfer process. Use of other functions is prohibited.

For more information, see the following document:

  • Developer's Information STN-10 "Restrictions and Precautions due to SCU Specification Changes"
    No.08 “A-Bus ← → Prohibit access to A-Bus and B-Bus from CPU during B-Bus DMA operation”

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