Renesas SH7709S Manual Do Utilizador

Rev. 5.00, 09/03, page 361 of 760

Relationship between Request Modes and Bus Modes by DMA Transfer Category: Table
11.6 shows the relationship between request modes and bus modes by DMA transfer category.

Dual

External device with DACK and
external memory

External

B/C

8/16/32/128

0,1

External device with DACK and
memory-mapped external device

External

B/C

8/16/32/128

0, 1

External memory and external
memory

All

*

1

B/C

8/16/32/128

0–3

*

5

External memory and memory-
mapped external device

All 

*

1

B/C

8/16/32/128

0–3

*

5

Memory-mapped external device
and memory-mapped external
device

All 

*

1

B/C

8/16/32/128

0–3

*

5

External memory and on-chip
peripheral module

All 

*

2

B/C

*

3

8/16/32

*

4

0–3

*

5

Memory-mapped external device
and on-chip peripheral module

All 

*

2

B/C

*

3

8/16/32

*

4

0–3

*

5

On-chip peripheral module and on-
chip peripheral module

All 

*

2

B/C

*

3

8/16/32

*

4

0–3

*

5

Single

External device with DACK and
external memory

External

B/C

8/16/32/128

0, 1

External device with DACK and
memory-mapped external device

External

B/C

8/16/32/128

0, 1

B: Burst, C: Cycle-steal

Notes: 1. External requests, auto requests and on-chip peripheral module (CMT) requests are all

available.

2. External requests, auto requests and on-chip peripheral module requests are all

available. When the IrDA, SCIF, or A/D converter is also the transfer request source,
however, the transfer destination or transfer source must be the IrDA, SCIF, or A/D
converter, respectively.

3. If the transfer request source is the IrDA, SCIF, or A/D converter only cycle-steal mode

is available.

4. The access size permitted when the transfer destination or source is an on-chip

peripheral module register.

5. If the transfer request is an external request, only channels 0 and 1 are available.