Renesas HD6417641 用户手册
Section 13 Direct Memory Access Controller (DMAC)
Rev. 4.00 Sep. 14, 2005 Page 407 of 982
REJ09B0023-0400
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.
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
Symbol I/O
Function
DMA transfer request
DREQ0
I
DMA transfer request input from external
device to channel 0
device to channel 0
DMA transfer request
acknowledge
acknowledge
DACK0
O
Strobe output to an external I/O at DMA
transfer request from external device to
channel 0
transfer request from external device to
channel 0
0
DMA transfer end
TEND
O
DMA transfer end output for channel 0
DMA transfer request
DREQ1
I
DMA transfer request input from external
device to channel 1
device to channel 1
1
DMA transfer request
acknowledge
acknowledge
DACK1
O
Strobe output to an external I/O at DMA
transfer request from external device to
channel 1
transfer request from external device to
channel 1