Rev. 2.00, 09/03, page 260 of 690
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 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 8.8.
Table 8.8
Supported DMA Transfers
Destination
Source
External
Device with
DACK
External
Memory
Memory-
Mapped
External Device
On-Chip Peripheral
Module
External device with DACK
Not available Dual, single Dual, single
Not available
External memory
Dual, single
Dual
Dual
Dual
Memory-mapped external
device
Dual, single
Dual
Dual
Dual
On-chip peripheral module
Not
available
Dual
Dual
Dual
Notes: 1. Dual: Dual address mode
2. Single: Single address mode
3. A 16-byte transfer is available only for the registers to which longword-size access is
enabled in the on-chip peripheral modules.
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