SH7080_09 Datasheet, PDF (466/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 10 Direct Memory Access Controller (DMAC)
10.4.4 DMA Transfer Types
DMA transfer has two types; single address mode transfer and dual address mode transfer. They
depend on the number of bus cycles of access to source and destination. A data transfer timing
depends on the bus mode, which has cycle steal mode and burst mode. The DMAC supports the
transfers shown in table 10.7.
Table 10.7 Supported DMA Transfers
Destination
Source
External
Device with External
DACK
Memory
Memory-
Mapped
External
Device
On-Chip
Peripheral On-Chip
Module
Memory
External device with DACK Not
available
Dual,
single
Dual,
single
Not
available
Not
available
External memory
Dual, single Dual
Dual
Dual
Dual
Memory-mapped external
device
Dual, single Dual
Dual
Dual
Dual
On-chip peripheral module Not
available
Dual
Dual
Dual
Dual
On-chip memory
Not
available
Dual
Dual
Dual
Dual
Notes: 1. Dual: Dual address mode
2. Single: Single address mode
3. For on-chip peripheral modules, 16-byte transfer is available only by registers which
can be accessed in longword units.
Rev. 4.00 Dec. 15, 2009 Page 406 of 1558
REJ09B0181-0400