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Information Technology at Attachment Interface for Disk Drives

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Book Id: WPLBN0000661630
Format Type: PDF eBook
File Size: 134.29 KB.
Reproduction Date: 2005

Title: Information Technology at Attachment Interface for Disk Drives  
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Language: English
Subject: Technology., Reference materials, Technology and literature
Collections: Techonology eBook Collection
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Information Technology at Attachment Interface for Disk Drives. (n.d.). Information Technology at Attachment Interface for Disk Drives. Retrieved from http://www.worldebookfair.com/


Description
Technical Reference Publication

Excerpt
Foreword: (This foreword is not part of American National Standard X3.221- 199x.) This standard defines the AT Attachment Interface. This standard defines an integrated bus interface between disk drives and host processors. It provides a common point of attachment for systems manufacturers, system integrators, and suppliers of intelligent peripherals.

Table of Contents
Contents Page Foreword. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 Normative references. . . . . . . . . . . . . . . . . . . . . . . . . 1 3 Definitions, symbols, and abbreviations . . . . . . . . . . . . . . . 1 3.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3.2 Symbols and abbreviations . . . . . . . . . . . . . . . . . . . 2 4 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.1 Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 4.2 Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . 2 5 Interface cabling requirements . . . . . . . . . . . . . . . . . . . 3 5.1 Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 3 5.2 Addressing considerations . . . . . . . . . . . . . . . . . . . 4 5.2.1 DC cable and connector . . . . . . . . . . . . . . . . . . . 4 5.2.2 4-pin power . . . . . . . . . . . . . . . . . . . . . . . . . 4 5.2.3 3-pin power . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.2.4 Device grounding . . . . . . . . . . . . . . . . . . . . . . 5 5.3 I/O connector . . . . . . . . . . . . . . . . . . . . . . . . . 5 5.4 I/O cable . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 Physical interface. . . . . . . . . . . . . . . . . . . . . . . . . . 6 6.1 Signal conventions. . . . . . . . . . . . . . . . . . . . . . . 6 6.2 Signal summary. . . . . . . . . . . . . . . . . . . . . . . . . 7 6.3 Signal descriptions . . . . . . . . . . . . . . . . . . . . . . 8 6.3.1 CS1FX- (drive chip select 0). . . . . . . . . . . . . . . . . 8 6.3.2 CS3FX- (drive chip select 1). . . . . . . . . . . . . . . . . 8 6.3.3 DA0-2 (Drive address bus) . . . . . . . . . . . . . . . . . . 8 6.3.4 DASP- (Drive active/drive 1 present). . . . . . . . . . . . . 9 6.3.5 DD0-DD15 (Drive data bus) . . . . . . . . . . . . . . . . . . 9 6.3.6 DIOR- (Drive I/O read). . . . . . . . . . . . . . . . . . . . 9 6.3.7 DIOW- (Drive I/O write) . . . . . . . . . . . . . . . . . . . 9 6.3.8 DMACK- (DMA acknowledge) (Optional) . . . . . . . . . . . . . 9 6.3.9 DMARQ (DMA request) (Optional). . . . . . . . . . . . . . . . 9 6.3.10 INTRQ (Drive interrupt). . . . . . . . . . . . . . . . . . . 10 6.3.11 IOCS16- (Drive 16-bit I/O) . . . . . . . . . . . . . . . . . 10 6.3.12 IORDY (I/O channel ready) (Optional) . . . . . . . . . . . . 10 6.3.13 PDIAG- (Passed diagnostics). . . . . . . . . . . . . . . . . 10 6.3.14 RESET- (Drive reset) . . . . . . . . . . . . . . . . . . . . 11 6.3.15 SPSYNC:CSEL (Spindle synchronization/cable select) (Optional) 11 6.3.16 SPSYNC (Spindle synchronization) (Optional) . . . . . . . . 11 6.3.17 CSEL (Cable select) (Optional) . . . . . . . . . . . . . . . 12 7 Logical interface . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

 

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