D12320VF25IV Datasheet, PDF (334/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 7 DMA Controller (Not Supported in the H8S/2321)
7.5.16 Forced Termination of DMAC Operation
If the DTE bit for the channel currently operating is cleared to 0, the DMAC stops on completion
of the 1-byte or 1-word transfer in progress. DMAC operation resumes when the DTE bit is set to
1 again.
In full address mode, the same applies to the DTME bit.
Figure 7.37 shows the procedure for forcibly terminating DMAC operation by software.
Forced termination
of DMAC
[1] Clear the DTE bit in DMABCRL to 0.
To prevent interrupt generation after forced
termination of DMAC operation, clear the DTIE bit
to 0 at the same time.
Clear DTE bit to 0
[1]
Forced termination
Figure 7.37 Example of Procedure for Forcibly Terminating DMAC Operation
Rev.6.00 Sep. 27, 2007 Page 302 of 1268
REJ09B0220-0600