HD6432351 datasheet(233/1025 Pages) RENESAS

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Section 7 DMA Controller (DMAC)

Rev. 3.00 Sep 15, 2006 page 199 of 988

REJ09B0330-0300

7.1.4

Pin Configuration

Table 7.2 summarizes the DMAC pins.

In short address mode, external request transfer, single address transfer, and transfer end output

are not performed for channel A.

The DMA transfer acknowledge function is used in channel B single address mode in short

address mode.

When the

DREQ pin is used, do not designate the corresponding port for output.

With regard to the

DACK pins, setting single address transfer automatically sets the corresponding

port to output, functioning as a

DACK pin.

With regard to the

TEND pins, whether or not the corresponding port is used as a TEND pin can

be specified by means of a register setting.

Table 7.2

DMAC Pins

Channel

Pin Name

Symbol

I/O

Function

DMA request 0

DREQ0

Input

DMAC channel 0 external

request

DMA transfer acknowledge 0

DACK0

Output

DMAC channel 0 single

address transfer acknowledge

DMA transfer end 0

TEND0

Output

DMAC channel 0 transfer end

DMA request 1

DREQ1

Input

DMAC channel 1 external

request

DMA transfer acknowledge 1

DACK1

Output

DMAC channel 1 single

address transfer acknowledge

DMA transfer end 1

TEND1

Output

DMAC channel 1 transfer end

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