SH7243 datasheet(455/1726 Pages) RENESAS

455 / 1726 page

Section 10 Direct Memory Access Controller (DMAC)

Rev. 1.00 Jun. 26, 2008 Page 425 of 1692

REJ09B0393-0100

Table 10.10 Relationship of Request Modes and Bus Modes by DMA Transfer Category

Address

Mode

Transfer Category

Request

Mode

Bus

Mode

Transfer

Size (Bits)

Usable

Channels

External device with DACK and external memory

External

B/C

8/16/32/128

0 to 3

External device with DACK and memory-mapped

external device

External

B/C

8/16/32/128

0 to 3

External memory and external memory

All*

B/C

8/16/32/128

0 to 7*

External memory and memory-mapped external

device

All*

B/C

8/16/32/128

0 to 7*

Memory-mapped external device and memory-

mapped external device

All*

B/C

8/16/32/128

0 to 7*

External memory and on-chip peripheral module

All*

B/C*

8/16/32/128*

0 to 7*

Memory-mapped external device and

on-chip peripheral module

All*

B/C*

8/16/32/128*

0 to 7*

On-chip peripheral module and on-chip peripheral

module

All*

B/C*

8/16/32/128*

0 to 7*

On-chip memory and on-chip memory

All*

B/C

8/16/32/128

0 to 7*

On-chip memory and memory-mapped external

device

All*

B/C

8/16/32/128

0 to 7*

On-chip memory and on-chip peripheral module

All*

B/C*

8/16/32/128*

0 to 7*

Dual

On-chip memory and external memory

All*

B/C

8/16/32/128

0 to 7*

External device with DACK and external memory

External

B/C

8/16/32/128

0 to 3

Single

External device with DACK and memory-mapped

external device

External

B/C

8/16/32/128

0 to 3

[Legend]

B: Burst

C: Cycle steal

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

available. However, along with the exception of CMT and MTU2 as the transfer request

source, the requesting module must be designated as the transfer source or the

transfer destination.

2. Access size permitted for the on-chip peripheral module register functioning as the

transfer source or transfer destination.

3. If the transfer request is an external request, channels 0 to 3 are only available.

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

available. In the case of on-chip peripheral module requests, however, the CMT and

MTU2 are only available.

5. Only cycle steal except for the MTU2 and CMT as the transfer request source.

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