H8SSLASH2225 datasheet(360/1071 Pages) RENESAS

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Section 8 DMA Controller (DMAC)

Rev. 5.00 Aug 08, 2006 page 274 of 982

REJ09B0054-0500

Forced termination

of DMAC

Clear DTE bit to 0

Forced termination

[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.

Figure 8.35 Example of Procedure for Forcibly Terminating DMAC Operation

8.5.15

Clearing Full Address Mode

Figure 8.36 shows the procedure for releasing and initializing a channel designated for full address

mode. After full address mode has been cleared, the channel can be set to another transfer mode

using the appropriate setting procedure.

Clearing full

address mode

Stop the channel

Initialize DMACR

Clear FAE bit to 0

Initialization;

operation halted

[1]

[2]

[3]

[1]

Clear both the DTE bit and DTME bit in

DMABCRL to 0, or wait until the transfer ends

and the DTE bit is cleared to 0, then clear the

DTME bit to 0. Also clear the corresponding

DTIE bit to 0 at the same time.

[2]

Clear all bits in DMACRA and DMACRB to 0.

[3]

Clear the FAE bit in DMABCRH to 0.

Figure 8.36 Example of Procedure for Clearing Full Address Mode

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