Types Of Dma Transfer - Hitachi SH7750 series Hardware Manual

14.3.4

Types of DMA Transfer

The DMAC supports the transfers shown in table 14.6. It can operate in single address mode, in
which either the transfer source or the transfer destination is accessed using the acknowledge
signal, or in dual address mode, in which both the transfer source and transfer destination
addresses are output. The actual transfer operation timing depends on the bus mode, which can be
either burst mode or cycle steal mode.
Table 14.6 Supported DMA Transfers
Transfer Source
External device
with DACK
External memory
Memory-mapped
external device
On-chip peripheral
module
External Device External
with DACK Memory
Not available Single address
mode
Single address Dual address
mode mode
Single address Dual address
mode mode
Not available Dual address
mode
Transfer Destination
Memory-Mapped
External Device
Single address
mode
Dual address mode Dual address mode
Dual address mode Dual address mode
Dual address mode Not available
Rev. 4.0, 04/00, page 447 of 850
On-Chip
Peripheral Module
Not available