TS2GDOM40H-S datasheet(27/39 Pages) TRANSCEND

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Transcend Information Inc.

Ver 1.3

Sustaining an Ultra DMA Data-Out Burst

An Ultra DMA Data-Out burst is sustained by following the steps lettered below. The timing diagram

is shown in below: Sustained Ultra DMA Data-Out Burst Timing. The associated timing parameters are

specified in Page 12: Ultra DMA Data Burst Timing Requirements and are described in Page 13: Ultra

DMA Data Burst Timing Descriptions.

The following steps shall occur in the order they are listed unless otherwise specifically allowed:

(a) The host shall drive a data word onto D[15:00].

(b) The host shall generate an HSTROBE edge to latch the new word no sooner than tDVS after changing

the state of D[15:00]. The host shall generate an HSTROBE edge no more frequently than tCYC for the

selected Ultra DMA mode. The host shall not generate two rising or falling HSTROBE edges more

frequently than 2tcyc for the selected Ultra DMA mode.

to latch the data.

(d) The host shall repeat steps (a), (b), and (c) until the data transfer is complete or an Ultra DMA data

burst is paused, whichever occurs first.

Note: Data (D[15:00]) and HSTROBE signals are shown at both the device and the host to emphasize that cable

settling time as well as cable propagation delay shall not allow the data signals to be considered stable at

the device until some time after they are driven by the host.

TS2GDOM40H-S Datasheet(PDF) 27 Page - Transcend Information. Inc.