r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 386
r4f2426
Manufacturer Part Number
r4f2426
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2426.pdf
(1302 pages)
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Section 7 DMA Controller (DMAC)
Figure 7.12 shows an example of the setting procedure for normal mode.
Rev. 1.00 Sep. 19, 2008 Page 358 of 1270
REJ09B0466-0100
Set number of transfers
Set transfer source and
Normal mode setting
transfer destination
Read DMABCRL
Set DMABCRH
Set DMABCRL
Normal mode
Set DMACR
addresses
Figure 7.12 Example of Normal Mode Setting Procedure
[1]
[2]
[3]
[4]
[5]
[6]
[1] Set each bit in DMABCRH.
[2] Set the transfer source address in MARA, and
[3] Set the number of transfers in ETCRA.
[4] Set each bit in DMACRA and DMACRB.
[5] Read DTE = 0 and DTME = 0 in DMABCRL.
[6] Set each bit in DMABCRL.
• Set the FAE bit to 1 to select full address
• Specify enabling or disabling of internal
the transfer destination address in MARB.
• Set the transfer data size with the DTSZ bit.
• Specify whether MARA is to be incremented,
• Clear the BLKE bit to 0 to select normal
• Specify whether MARB is to be incremented,
• Select the activation source with bits DTF3 to
• Specify enabling or disabling of transfer end
• Set both the DTME bit and the DTE bit to 1 to
mode.
interrupt clearing with the DTA bit.
decremented, or fixed, with the SAID and
SAIDE bits.
mode.
decremented, or fixed, with the DAID and
DAIDE bits.
DTF0.
interrupts with the DTIE bit.
enable transfer.
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