HD6413007F20 Datasheet, PDF (254/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

7. DMA Controller
Start
(DTE = DTME = 1)
No
Transfer requested?
Yes
Get bus
Start
(DTE = DTME = 1)
No
Transfer requested?
Yes
Get bus
Read from MARA address
MARA = MARA + 1
Write to MARB address
MARB = MARB + 1
ETCRAH = ETCRAH − 1
No
ETCRAH = H'00
Yes
Release bus
ETCRAH = ETCRAL
MARB = MARB ÐÊETCRAL
ETCRB = ETCRB − 1
No
ETCRB = H'0000
Yes
Clear DTE to 0 and end transfer
Read from MARA address
MARA = MARA + 1
Write to MARB address
ETCRAH = ETCRAH − 1
No
ETCRAH = H'00
Yes
Release bus
ETCRAH = ETCRAL
ETCRB = ETCRB − 1
No
ETCRB = H'0000
Yes
Clear DTE to 0 and end transfer
a. DTSZ = TMS = 0
SAID = DAID = 0
SAIDE = DAIDE = 1
b. DTSZ = TMS = 0
SAID = 0
SAIDE = 1
DAIDE = 0
Figure 7.11 Block Transfer Mode Flowcharts
Rev.5.00 Sep. 12, 2007 Page 224 of 764
REJ09B0396-0500