Parallel SCSI Interface
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Parallel SCSI Interface Ultra 160 Ultra 320 Parallel SCSI Interface Ultra 160 Ultra 320 ©2006, Seagate Technology LLC All rights reserved Publication number: 100293069, Rev. A March 2006 Seagate and Seagate Technology are registered trademarks of Seagate Technology LLC. SeaTools, SeaFONE, SeaBOARD, SeaTDD, and the Wave logo are either registered trade- marks or trademarks of Seagate Technology LLC. Other product names are registered trade- marks or trademarks of their owners. Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publication may be reproduced in any form without written permission of Seagate Technology LLC. Revision status summary sheet Revision Date Writer/Engineer Sheets Affected Rev. A 03/27/06 C. Chalupa/G. Houlder All. Parallel SCSI Interface Product Manual, Rev. A iii iv Parallel SCSI Interface Product Manual, Rev. A Table of Contents 1.0 Interface requirements. 1 1.1 How to use this interface manual. 1 1.1.1 Scope of SCSI standards . 2 1.1.2 Applicable standards. 3 1.2 General interface description . 3 1.2.1 Glossary . 4 1.2.2 Keywords . 11 1.3 Physical interface characteristics. 12 1.4 Summary of SCSI messages. 12 2.0 SCSI bus . 13 2.1 SCSI bus signals overview . 15 2.1.1 Drive select . 17 2.1.2 Signal values. 17 2.2 Signal states . 17 2.2.1 SE signals . 17 2.2.2 LVD signals. 17 2.3 OR-tied signals . 18 2.4 Signal sources . 19 2.5 SCSI bus timing . 20 2.5.1 Arbitration delay . 26 2.5.2 ATN transmit setup time . 26 2.5.3 ATN receive setup time. 26 2.5.4 Bus clear delay . 27 2.5.5 Bus free delay . 27 2.5.6 Bus set delay . 27 2.5.7 Bus settle delay. 27 2.5.8 Cable skew delay . 27 2.5.9 Chip noise in receiver . 27 2.5.10 Clock jitter . 27 2.5.11 Crosstalk time shift . 27 2.5.12 De-skewed data valid window. 28 2.5.13 Flow control receive hold time. 28 2.5.14 Flow control receive setup time. 28 2.5.15 Flow control transmit hold time . 28 2.5.16 Flow control transmit setup time . 28 2.5.17 pCRC receive hold time . 28 2.5.18 pCRC receive setup time . 28 2.5.19 pCRC transmit hold time. 28 2.5.20 pCRC transmit setup time. 28 2.5.21 Data release delay . 29 2.5.22 DIFFSENS voltage filter time . 29 2.5.23 Offset induced time asymmetry. 29 2.5.24 Physical disconnection delay . 29 2.5.25 Power on to selection . 29 2.5.26 QAS arbitration delay . 29 2.5.27 QAS assertion delay . 29 2.5.28 QAS release delay . 29 2.5.29 QAS non-data phase REQ(ACK) period. 29 2.5.30 Receive assertion period . 29 2.5.31 Receive hold time . 29 2.5.32 Receive internal hold time. 30 2.5.33 Receive internal setup time. 30 2.5.34 Receive negation period . 30 Parallel SCSI Interface Product Manual, Rev. A v 2.5.35 Receive setup time . 30 2.5.36 Receive REQ(ACK) period tolerance . 30 2.5.37 Receive REQ assertion period with P_CRCA transitioning. 30 2.5.38 Receive REQ negation period with P_CRCA transitioning . 30 2.5.39 Receive skew compensation . 30 2.5.40 Receiver amplitude time skew. 31 2.5.41 REQ(ACK) period . ..