AXIOMTEK STX88810VEA, Руководство пользователя

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STX88810 STX Evaluation Platform Module Series User’s Manual
Ultra DMA/66/100 Reference
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A p p e n d i x A
Ultra DMA/66/100 Reference
Overview
Ultra ATA66/100 is a low cost extension of the Ultra ATA/66/100 hard
drive interface that enhance its burst data rate. Also known as Ultra
DMA/100 and Fast ATA-2, Ultra ATA/66/100 allows host computers to
send and receive data at 100 MB/s, which is triple the data transfer
speeds of 33.3 MB/s of Ultra DMA/33. The result is maximum disk
performance under PCI local bus environments.
At its fast burst data rates, Ultra ATA66/100 will go farther than Ultra
ATA66/100 in removing bottlenecks associated with data transfers,
especially during sequential operations. Ultra ATA66/100 also delivers
heightened data integrity to the EIDE interface through use of a 40-pin
80-conductor cable, and CRC (Cyclic Redundancy Check) error
detection code. The 80-conductor cable reduces crosstalk and
improves signal integrity by providing 40 additional ground lines
between the 40-pin IDE signal and ground lines. The connector is plug-
compatible with existing 40-pin headers, and the incremental cost for
the cable should be minimal. As with Ultra ATA/33, CRC ensures the
integrity of transferred data.