IBM IC25N020ATDA04 Hard Drive Specifications - Page 64

HSTROBE Ultra DMA, DDMARDY- Ultra DMA, host during or after data transfer in an Ultra

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HSTROBE (Ultra DMA) This signal is used only for Ultra DMA data transfers between host and drive. The signal HSTROBE is the data out strobe signal from the host for Ultra DMA data out transfers. Both the rising and falling edge of HSTROBE latch the data from DD (15:0) into the device. The host may stop toggling HSTROBE to effect a pause in Ultra DMA data out transfers. STOP (Ultra DMA) This signal is used only for Ultra DMA data transfers between host and drive. The STOP signal shall be asserted by the host prior to initiation of an Ultra DMA burst. A STOP shall be negated by the host before data is transferred in an Ultra DMA burst. Assertion of STOP by the host during or after data transfer in an Ultra DMA mode signals the termination of the burst. DDMARDY- (Ultra DMA) This signal is used only for Ultra DMA data transfers between host and drive. The signal DDMARDY- is a flow control signal for Ultra DMA data out bursts. This signal is held asserted by the device to indicate to the host that the device is ready to receive Ultra DMA data out transfers. The device may negate DDMARDY- to effect a pause in Ultra DMA data out transfers. DSTROBE (Ultra DMA) This signal is used only for Ultra DMA data transfers between host and drive. The signal DSTROBE is the data in strobe signal from the device for an Ultra DMA data in transfer. Both the rising and the falling edge of DSTROBE latch the data from DD (15:0) into the host. The device may stop toggling DSTROBE to effect a pause in an Ultra DMA data in transfer. Travelstar 48GH, 30GN & 15GN hard disk drive specifications 50

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HSTROBE (Ultra DMA)
This signal is used only for Ultra DMA data transfers between host and drive.
The signal HSTROBE is the data out strobe signal from the host for Ultra DMA data out transfers.
Both the rising and falling edge of HSTROBE latch the data from DD (15:0) into the device. The host
may stop toggling HSTROBE to effect a pause in Ultra DMA data out transfers.
STOP (Ultra DMA)
This signal is used only for Ultra DMA data transfers between host and drive.
The
STOP
signal shall be asserted by the host prior to initiation of an Ultra
DMA
burst.
A STOP
shall
be negated by the host before data is transferred in an Ultra
DMA
burst. Assertion of
STOP
by the
host during or after data transfer in an Ultra
DMA
mode signals the termination of the burst.
DDMARDY- (Ultra DMA)
This signal is used only for Ultra DMA data transfers between host and drive.
The signal DDMARDY- is a flow control signal for Ultra DMA data out bursts. This signal is held
asserted by the device to indicate to the host that the device is ready to receive Ultra DMA data out
transfers. The device may negate DDMARDY- to effect a pause in Ultra DMA data out transfers.
DSTROBE (Ultra DMA)
This signal is used only for Ultra DMA data transfers between host and drive.
The signal DSTROBE is the data in strobe signal from the device for an Ultra DMA data in transfer.
Both the rising and the falling edge of DSTROBE latch the data from DD (15:0) into the host. The
device may stop toggling DSTROBE to effect a pause in an Ultra DMA data in transfer.
Travelstar 48GH, 30GN & 15GN hard disk drive specifications
50