r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 391
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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Figure 7.15 shows the operation flow in block transfer mode.
Figure 7.15 Operation Flow in Block Transfer Mode
MARB = MARB – DAIDE·(–1)
MARA = MARA – SAIDE·(–1)
MARB = MARB + DAIDE·(–1)
MARA = MARA + SAIDE·(–1)
Write to address specified by MARB
No
Read address specified by MARA
ETCRAL = ETCRAL – 1
ETCRB = ETCRB – 1
ETCRAL = ETCRAH
(DTE = DTME = 1)
Transfer request?
Clear DTE bit to 0
ETCRB = H'0000
ETCRAL = H'00
to end transfer
Release bus
Acquire bus
BLKDIR = 0
Start
Yes
Yes
Yes
Yes
SAID
DAID
·2
·2
DAID
SAID
DTSZ
DTSZ
Rev. 1.00 Sep. 19, 2008 Page 363 of 1270
·2
·2
·ETCRAH
·ETCRAH
DTSZ
DTSZ
No
No
No
Section 7 DMA Controller (DMAC)
REJ09B0466-0100
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