r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 372

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 DMA Controller (DMAC)
Figure 7.4 shows an example of the setting procedure for sequential mode.
Rev. 1.00 Sep. 19, 2008 Page 344 of 1270
REJ09B0466-0100
Sequential mode setting
and transfer destination
Set number of transfers
Set transfer source
Read DMABCRL
Set DMABCRH
Sequential mode
Set DMABCRL
Set DMACR
addresses
Figure 7.4 Example of Sequential Mode Setting Procedure
[1]
[2]
[3]
[4]
[5]
[6]
[1] Set each bit in DMABCRH.
[2] Set the transfer source address and transfer
[3] Set the number of transfers in ETCR.
[4] Set each bit in DMACR.
[5] Read the DTE bit in DMABCRL as 0.
[6] Set each bit in DMABCRL.
• Specify enabling or disabling of transfer end
• Set the DTE bit to 1 to enable transfer.
• Clear the FAE bit to 0 to select short address
• Specify enabling or disabling of internal
destination address in MAR and IOAR.
• Set the transfer data size with the DTSZ bit.
• Specify whether MAR is to be incremented or
• Clear the RPE bit to 0 to select sequential
• Specify the transfer direction with the DTDIR
• Select the activation source with bits DTF3 to
decremented with the DTID bit.
mode.
bit.
DTF0.
mode.
interrupt clearing with the DTA bit.
interrupts with the DTIE bit.