HD6432351 datasheet(279/1025 Pages) RENESAS

279 / 1025 page

Section 7 DMA Controller (DMAC)

Rev. 3.00 Sep 15, 2006 page 245 of 988

REJ09B0330-0300

Figure 7.8 shows an example of the setting procedure for repeat mode.

Repeat mode setting

Set DMABCRH

Set transfer source

and transfer destination

addresses

Set number of transfers

Set DMACR

Read DMABCRL

Set DMABCRL

Repeat mode

[1]

[2]

[3]

[4]

[5]

[6]

[1] Set each bit in DMABCRH.

• Clear the FAE bit to 0 to select short address

mode.

• Specify enabling or disabling of internal

interrupt clearing with the DTA bit.

[2] Set the transfer source address and transfer

destination address in MAR and IOAR.

[3] Set the number of transfers in both ETCRH and

ETCRL.

[4] Set each bit in DMACR.

• Set the transfer data size with the DTSZ bit.

• Specify whether MAR is to be incremented or

decremented with the DTID bit.

• Set the RPE bit to 1.

• Specify the transfer direction with the DTDIR

bit.

• Select the activation source with bits DTF3 to

DTF0.

[5] Read the DTE bit in DMABCRL as 0.

[6] Set each bit in DMABCRL.

• Clear the DTIE bit to 0.

• Set the DTE bit to 1 to enable transfer.

Figure 7.8 Example of Repeat Mode Setting Procedure

HD6432351 Datasheet(PDF) 279 Page - Renesas Technology Corp

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