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13.2
Input/Output Pins
The external pins for DMAC are described below. Table 13.1 lists the configuration of the pins
that are connected to external bus. DMAC has pins for 2 channels (channels 0 and 1) for external
bus use.
Table 13.1 Pin Configuration
Channel Name
0
DMA transfer request
DMA transfer request
acknowledge
DMA transfer end
1
DMA transfer request
DMA transfer request
acknowledge
Section 13 Direct Memory Access Controller (DMAC)
Symbol
I/O
Function
DREQ0
I
DMA transfer request input from external
device to channel 0
DACK0
O
Strobe output to an external I/O at DMA
transfer request from external device to
channel 0
TEND
O
DMA transfer end output for channel 0
DREQ1
I
DMA transfer request input from external
device to channel 1
DACK1
O
Strobe output to an external I/O at DMA
transfer request from external device to
channel 1
Rev. 4.00 Sep. 14, 2005 Page 407 of 982
REJ09B0023-0400
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