HD64F3048VTF8 Datasheet, PDF (265/903 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip

Section 8 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 − ETCRAL
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 8.11 Block Transfer Mode Flowcharts (Examples)
Rev. 3.00 Sep 27, 2006 page 237 of 872
REJ09B0325-0300