ELECTRICAL SPECIFICATION

 

 

SSD-CXXX(I)-3150 DATA SHEET

 

 

Table 8: Signal Descriptions (Continued)

 

 

 

 

 

 

 

 

Signal Name

Pin

Type

Description

 

 

 

 

 

 

 

 

DMARQ

43

O

In true IDE mode, this signal is used

 

 

(True IDE mode)

 

 

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

31, 30, 29,

I/O

These lines carry the data,

 

 

(PC Card memory

28, 27, 49,

 

commands, and status information

 

 

mode)

48, 47, 6,

 

between the host and the controller.

 

 

 

5, 4, 3, 2,

 

• D00 is the LSB of the word’s even

 

 

 

23, 22, 21

 

 

 

 

 

byte.

 

 

 

 

 

 

 

 

 

 

• D08 is the LSB of the word’s odd

 

 

 

 

 

byte.

 

 

 

 

 

 

 

 

D15-D00

 

 

This signal is the same as the PC

 

 

(PC Card I/O

 

 

Card Memory Mode signal.

 

 

mode)

 

 

 

 

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

1, 50

-

Ground.

(PC Card memory

 

 

 

mode)

 

 

 

 

 

 

 

GND

 

 

This signal is the same for all modes.

(PC Card I/O

 

 

 

mode)

 

 

 

 

 

 

 

GND

 

 

This signal is the same for all modes.

(True IDE mode)

 

 

 

 

 

 

 

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3150C-10DSR

PAGE 9

FEBRUARY 2, 2009

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Image 19
Silicon Image SSD-C08G(I)-3150 manual Dmarq, Gnd, Ground, True IDE mode