User Guide

ELECTRICAL SPECIFICATION SSD-CXXX(I)-3150 DATA SHEET
SILICONSYSTEMS PROPRIETARY
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3150C-10DSR PAGE 9FEBRUARY 2, 2009
DMARQ
(True IDE mode)
43 O In true IDE mode, 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 controlled
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.
D15-D00
(PC Card memory
mode)
31, 30, 29,
28, 27, 49,
48, 47, 6,
5, 4, 3, 2,
23, 22, 21
I/O These lines carry the data,
commands, and status information
between the host and the controller.
• D00 is the LSB of the word’s even
byte.
• D08 is the LSB of the word’s odd
byte.
D15-D00
(PC Card I/O
mode)
This signal is the same as the PC
Card Memory Mode signal.
D15-D00
(True IDE mode)
In true IDE mode, all Task File
operations occur in byte mode on the
low-order bus D00-D07, while all data
transfers are 16 bits using D00-D15.
GND
(PC Card memory
mode)
1, 50 - Ground.
GND
(PC Card I/O
mode)
This signal is the same for all modes.
GND
(True IDE mode)
This signal is the same for all modes.
Table 8: Signal Descriptions (Continued)
Signal Name Pin Type Description