SH7211 Datasheet, PDF (326/1228 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family

Section 9 Direct Memory Access Controller (DMAC)
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
0
DMA transfer request DREQ0
I
DMA transfer request DACK0
O
acknowledge
1
DMA transfer request DREQ1
I
DMA transfer request DACK1
O
acknowledge
2
DMA transfer request DREQ2
I
DMA transfer request DACK2
O
acknowledge
3
DMA transfer request DREQ3
I
DMA transfer request DACK3
O
acknowledge
0
DMA transfer end TEND0
O
1
DMA transfer end TEND1
O
Function
DMA transfer request input from an
external device to channel 0
DMA transfer request acknowledge
output from channel 0 to an external
device
DMA transfer request input from an
external device to channel 1
DMA transfer request acknowledge
output from channel 1 to an external
device
DMA transfer request input from an
external device to channel 2
DMA transfer request acknowledge
output from channel 2 to an external
device
DMA transfer request input from an
external device to channel 3
DMA transfer request acknowledge
output from channel 3 to an external
device
DMA transfer end output for channel 0
DMA transfer end output for channel 1
Rev. 2.00 May. 08, 2008 Page 302 of 1200
REJ09B0344-0200