SH7710 Datasheet, PDF (527/996 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 13 Direct Memory Access Controller (DMAC)
This LSI
External address bus External data bus
DMAC
External
memory
External device
with DACK
Data flow
DACK
DREQ
Figure 13.7 Data Flow in Single Address Mode
Two kinds of transfer are possible in single address mode: (1) transfer between an external
device with DACK and a memory-mapped external device, and (2) transfer between an
external device with DACK and external memory. In both cases, only the external request
signal (DREQ) is used for transfer requests.
Figures 13.8 shows example of DMA transfer timing in single address mode.
Rev. 2.00 Dec. 07, 2005 Page 485 of 950
REJ09B0079-0200