SH7670 Datasheet, PDF (356/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 8 Direct Memory Access Controller (DMAC)
8.4.4 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 the transfer source and destination. A data
transfer timing depends on the bus mode, which is the cycle steal mode or burst mode. The
DMAC supports the transfers shown in table 8.9.
Table 8.9 Supported DMA Transfers
Transfer Destination
External Device External
Transfer Source with DACK
Memory
Memory-Mapped On-Chip
On-Chip
External Device Peripheral 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 Dual, single
external device
Dual
Dual
Dual
Dual
On-chip
Not available
peripheral module
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. 16-byte transfer is available only for on-chip peripheral modules that support longword
access.
Rev. 1.00 Nov. 14, 2007 Page 330 of 1262
REJ09B0437-0100