SH7729R Datasheet, PDF (440/855 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

12.3.4 DMA Transfer Types
The DMAC supports the transfers shown in table 12.5. In dual address mode, both the transfer
source address and the transfer destination address are output. Dual address mode has a direct
address mode and indirect address mode. In direct address mode, an output address value is the
data transfer target address; in indirect address mode, the value stored in the output address, not
the output address value itself, is the data transfer target address. Data transfer timing depends on
the bus mode, which may be cycle-steal mode or burst mode.
Table 12.5 Supported DMA Transfers
Destination
Source
External
Device with External
DACK
Memory
Memory-
Mapped
External
Device
On-Chip
Peripheral
Module
XY Memory
External device with Not available Dual, single Dual, single Not available Not available
DACK
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
X/Y memory
Not available Dual
Dual
Dual
Dual
Notes: 1. Dual: Dual address mode
2. Single: Single address mode
3. Dual address mode includes direct address mode and indirect address mode.
4. 16-byte transfer is not available for on-chip peripheral modules.
Address Modes:
• Dual Address Mode
In dual address mode, both the transfer source and destination are accessed (selectable) by an
address. The source and destination can be located externally or internally. Dual address mode
has (1) a direct address transfer mode and (2) an indirect address transfer mode.
Rev. 5.0, 09/03, page 394 of 806