SH7672 datasheet(334/1292 Pages) RENESAS

334 / 1292 page

Section 8 Direct Memory Access Controller (DMAC)

Rev. 1.00 Nov. 14, 2007 Page 308 of 1262

REJ09B0437-0100

Bit

Bit Name

Initial

Value

R/W

Descriptions

11 to 8

RS[3:0]

0000

R/W

Resource Select

These bits specify which transfer requests will be sent

to the DMAC. The changing of transfer request source

should be done in the state when DMA enable bit (DE)

is set to 0.

0000: External request, dual address mode

0001: Setting prohibited

0010: External request/single address mode

External address space

→ External device with

DACK

0011: External request/single address mode

External device with DACK

→ External address

space

0100: Auto request

0101: Setting prohibited

0110: Setting prohibited

0111: Setting prohibited

1000: DMA extension resource selector

1001: Setting prohibited

1010: Setting prohibited

1011: Setting prohibited

1100: Setting prohibited

1101: Setting prohibited

1110: Setting prohibited

1111: Setting prohibited

Note: External request specification is valid only in

CHCR_0 to CHCR_3. If a request source is

selected in channels CHCR_4 to CHCR_7, no

operation will be performed.

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