SH7080_09 Datasheet, PDF (445/1622 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family

Section 10 Direct Memory Access Controller (DMAC)
10.2 Input/Output Pins
The external pins for the DMAC are described below. Table 10.1 lists the configuration of the pins
that are connected to external bus. The DMAC has pins for 4 channels for external bus use.
Table 10.1 Pin Configuration
Channel Pin Name
Symbol
0
DMA transfer request DREQ0
DMA transfer request DACK0
acknowledge
DMA transfer end
TEND0
1
DMA transfer request DREQ1
DMA transfer request DACK1
acknowledge
DMA transfer end
TEND1
2
DMA transfer request DREQ2
DMA transfer request DACK2
acknowledge
3
DMA transfer request DREQ3
DMA transfer request DACK3
acknowledge
I/O
Function
Input DMA transfer request input from
external device to channel 0
Output DMA transfer request acknowledge
output from channel 0 to external
device
Output DMA transfer end output for channel 0
Input DMA transfer request input from
external device to channel 1
Output DMA transfer request acknowledge
output from channel 1 to external
device
Output DMA transfer end output for channel 1
Input DMA transfer request input from
external device to channel 2
Output DMA transfer request acknowledge
output from channel 2 to external
device
Input DMA transfer request input from
external device to channel 3
Output DMA transfer request acknowledge
output from channel 3 to external
device
Rev. 4.00 Dec. 15, 2009 Page 385 of 1558
REJ09B0181-0400