SH7672 datasheet(356/1292 Pages) RENESAS

356 / 1292 page

Section 8 Direct Memory Access Controller (DMAC)

Rev. 1.00 Nov. 14, 2007 Page 330 of 1262

REJ09B0437-0100

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

Transfer Source

External Device

with DACK

External

Memory

Memory-Mapped

External Device

On-Chip

Peripheral Module

On-Chip

Memory

External device

with DACK

Not available

Dual, single

Not available

External memory

Dual, single

Dual

Memory-mapped

external device

Dual, single

Dual

On-chip

peripheral module

Not available

Dual

On-chip memory

Not available

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.

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