SH7641 Datasheet, PDF (485/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 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.
Rev. 4.00 Sep. 14, 2005 Page 435 of 982
REJ09B0023-0400