Transcend TS8GCF200I Fiche technique télécharger pdf (Page 21)

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Printed Circuit Board (PCB) Trace Requirements for Ultra DMA

On any PCB for a host or device supporting Ultra DMA:

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The longest D[15:00] trace shall be no more than 0.5" longer than either STROBE trace as measured from the

IC pin to the connector.

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The shortest D[15:00] trace shall be no more than 0.5" shorter than either STROBE trace as measured from

the IC pin to the connector.

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Ultra DMA Mode Cabling Requirement

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Operation in Ultra DMA mode requires a crosstalk suppressing cable. The cable shall have a grounded line

between each signal line.

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For True IDE mode operation using a cable with IDE (ATA) type 40 pin connectors it is recommended that the

host sense the cable type using the method described in the ANSI INCITS 361-2002 AT Attachment - 6

standard, to prevent use of Ultra DMA with a 40 conductor cable.

Table: Ultra DMA Termination with Pull-up or Pull down Example

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 86 87

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Transcend TS8GCF200I Fiche technique Page 21