R5F72115D160FPV datasheet(326/1228 Pages) RENESAS

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Section 9 Direct Memory Access Controller (DMAC)

Rev. 2.00 May. 08, 2008 Page 302 of 1200

REJ09B0344-0200

9.2

Input/Output Pins

The external pins for DMAC are described below. Table 9.1 lists the configuration of the pins that

are connected to external bus. DMAC has pins for four channels (channels 0 to 3) for external bus

use.

Table 9.1

Pin Configuration

Channel Name

Abbreviation I/O

Function

DMA transfer request DREQ0

DMA transfer request input from an

external device to channel 0

DMA transfer request

acknowledge

DACK0

DMA transfer request acknowledge

output from channel 0 to an external

device

DMA transfer request DREQ1

DMA transfer request input from an

external device to channel 1

DMA transfer request

acknowledge

DACK1

DMA transfer request acknowledge

output from channel 1 to an external

device

DMA transfer request DREQ2

DMA transfer request input from an

external device to channel 2

DMA transfer request

acknowledge

DACK2

DMA transfer request acknowledge

output from channel 2 to an external

device

DMA transfer request DREQ3

DMA transfer request input from an

external device to channel 3

DMA transfer request

acknowledge

DACK3

DMA transfer request acknowledge

output from channel 3 to an external

device

DMA transfer end

TEND0

DMA transfer end output for channel 0

DMA transfer end

TEND1

DMA transfer end output for channel 1

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