HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 178
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HD64F7050
Manufacturer Part Number
HD64F7050
Description
32-Bit RISC Microcomputer SuperH RISC engine Family/
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD64F7050.pdf
(841 pages)
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Section 9 Direct Memory Access Controller (DMAC)
9.3.4
The DMAC supports the transfers shown in table 9.5. It can operate in the single address mode, in
which either the transfer source or destination is accessed using an acknowledge signal, or dual
address mode, in which both the transfer source and destination addresses are output. The dual
address mode consists of a direct address mode, in which the output address value is the object of
a direct data transfer, and an indirect address mode, in which the output address value is not the
object of the data transfer, but the value stored at the output address becomes the transfer object
address. The actual transfer operation timing varies with the bus mode. The DMAC has two bus
modes: cycle-steal mode and burst mode.
Table 9.5
Transfer
Source
External
device with
DACK
External
memory
Memory-
mapped
external
device
On-chip
memory
On-chip
peripheral
module
Note: The dual address mode includes direct address mode and indirect address mode.
Rev. 5.00 Jan 06, 2006 page 158 of 818
REJ09B0273-0500
DMA Transfer Types
Supported DMA Transfers
External
Device with
DACK
Not available
Single address
mode
Single address
mode
Not available
Not available
External
Memory
Single address
mode
Dual address
mode
Dual address
mode
Dual address
mode
Dual address
mode
Transfer Destination
Memory-
Mapped
External
Device
Single address
mode
Dual address
mode
Dual address
mode
Dual address
mode
Dual address
mode
On-Chip
Memory
Not available
Dual address
mode
Dual address
mode
Dual address
mode
Dual address
mode
On-Chip
Peripheral
Module
Not available
Dual address
mode
Dual address
mode
Dual address
mode
Dual address
mode
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