SH7641 Datasheet, PDF (482/1036 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family / SH7641 Series

Section 13 Direct Memory Access Controller (DMAC)
13.4.4 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 13.8.
Table 13.8 Supported DMA Transfers
Destination
Source
External Device External Memory-Mapped On-Chip
X/Y Memory
with DACK
Memory External Device Peripheral Module U 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 Dual, single
external device
Dual
Dual
Dual
Dual
On-chip
Not available
peripheral module
Dual
Dual
Dual
Dual
X/Y memory,
U memory
Not available Dual
Dual
Dual
Dual
Notes: 1. Dual: Dual address mode
2. Single: Single address mode
3. 16-byte transfer is not available for on-chip peripheral modules.
Rev. 4.00 Sep. 14, 2005 Page 432 of 982
REJ09B0023-0400