Silicon Image SSD-P08G(I)-3521 manual Dmarq, Gnd, Ground, True IDE mode

ELECTRICAL SPECIFICATION				SSD-PXXX(I)-3521 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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3521P-02DSR PAGE 10 FEBRUARY 2, 2009