SH7750_08 Datasheet, PDF (706/1162 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 14 Direct Memory Access Controller (DMAC)
DMA Operation Register (DMAOR)
31
15
98
4 2 10
DDT: 0: Normal DMA mode
1: On-demand data transfer mode
DDT
PR[1:0]
AE
COD ^NMIF
(SH7750S) DME
Figure 14.42 DDT Mode Setting
CLK
DBREQ
BAVL
TR
A25–A0
D63–D0
CMD
TDACK
ID1, ID0
DTR
MD = 01
No DMA request sampling
CA
CA
D0 D1 D2 D3 D0 D1 D2 D3 D1 D2 D3
WT
WT
Start of data transfer
Figure 14.43 Single Address Mode/Burst Mode/Edge Detection/
External Device → External Bus Data Transfer
Rev.7.00 Oct. 10, 2008 Page 622 of 1074
REJ09B0366-0700