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ELECTRICAL SPECIFICATION SSD-DXXX(I)-4210 DATA SHEET
SILICONSYSTEMS PROPRIETARY
This document and the information contained within it is confidential and proprietary to SiliconSystems, Inc.
All unauthorized use and/or reproduction is prohibited.
4210D-03DSR PAGE 8FEBRUARY 2, 2009
DMARQ 21 O DMA Request. This signal is used for DMA
transfers between the host and device.
DMARQ is asserted by the device when the
device is ready to transfer data to/from the
host. The direction of data transfer is
controller by -IORD and -IOWR. This signal
is used in a handshake manner with -
DMACK (i.e., the device waits until the host
asserts -DMACK before negating DMARQ,
and reasserts DMARQ if there is more data
to transfer). The DMARQ/-DMACK
handshake is used to provide flow control
during the transfer.
Table 8: Signal Descriptions (Continued)
Signal Name Pin(s) Type Description