Datasheet

Section 7 DMA Controller (DMAC)
Rev.7.00 Dec. 24, 2008 Page 188 of 698
REJ09B0074-0700
Figure 7.9 shows an example of the setting procedure for normal mode.
Normal mode
setting
Set DMABCRH
Set transfer source
and transfer destination
addresses
Set number of transfers
Set DMACR
Read DMABCRL
Set DMABCRL
Normal mode
[1]
[2]
[3]
[4]
[5]
[6]
[1] Set each bit in DMABCRH.
· Set the FAE bit to 1 to select full address
mode.
· Specify enabling or disabling of internal
interrupt clearing with the DTA bit.
[2] Set the transfer source address in MARA, and
the transfer destination address in MARB.
[3] Set the number of transfers in ETCRA.
[4] Set each bit in DMACRA and DMACRB.
· Set the transfer data size with the DTSZ bit.
· Specify whether MARA is to be
incremented, decremented, or fixed, with
the SAID and SAIDE bits.
· Clear the BLKE bit to 0 to select normal
mode.
· Specify whether MARB is to be
incremented, decremented, or fixed, with
the DAID and DAIDE bits.
· Select the activation source with bits DTF3
to DTF0.
[5] Read the DTE = 0 and DTME = 0 in
DMABCRL.
[6] Set each bit in DMABCRL.
· Specify enabling or desabling of transfer
end interrupts with the DTIE bit.
· Set both the DTME bit and the DTE bit to 1
to enable transfer.
Figure 7.9 Example of Normal Mode Setting Procedure