SH7052 datasheet(190/919 Pages) RENESAS

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9.3.7

Relationship between Request Modes and Bus Modes by DMA Transfer Category

Table 9.4 shows the relationship between request modes and bus modes by DMA transfer

category.

Table 9.4

Relationship between Request Modes and Bus Modes by DMA Transfer

Category

Address

Mode

Transfer Category

Request

Mode

Bus*

Mode

Transfer

Size (Bits)

Usable

Channels

Dual

External memory and external memory

Any*

B/C

8/16/32

0 to 3

External memory and memory-mapped

external device

Any*

B/C

8/16/32

0 to 3

Memory-mapped external device and

memory-mapped external device

Any*

B/C

8/16/32

0 to 3

External memory and on-chip memory

Any*

B/C

8/16/32

0 to 3

External memory and on-chip

peripheral module

Any*

B/C*

8/16/32*

0 to 3

Memory-mapped external device and

on-chip memory

Any*

B/C

8/16/32

0 to 3

Memory-mapped external device and

on-chip peripheral module

Any*

B/C*

8/16/32*

0 to 3

On-chip memory and on-chip memory

Any*

B/C

8/16/32

0 to 3

On-chip memory and on-chip

peripheral module

Any*

B/C*

8/16/32*

0 to 3

On-chip peripheral module and on-

chip peripheral module

Any*

B/C*

8/16/32*

0 to 3

B: Burst, C: Cycle-steal

Notes: 1. Auto-request or on-chip peripheral module request enabled. However, in the case of an

on-chip peripheral module request, it is not possible to specify the ATU, SCI, HCAN, or

A/D converter for the transfer request source.

2. Auto-request or on-chip peripheral module request possible. However, if the transfer

request source is the SCI, HCAN, or A/D converter, the transfer source or transfer

destination must be same as the transfer request source.

3. When the transfer request source is the SCI, only cycle-steal mode is possible.

4. Access size permitted by the on-chip peripheral module register that is the transfer

source or transfer destination.

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