Browse Prior Art Database

Multi Speed Control for Multi Mode SCSI I/O

IP.com Disclosure Number: IPCOM000014582D
Original Publication Date: 2002-Apr-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Abstract

[Original SCSI I/O] Multi mode SCSI I/O consists of Low Voltage Differential (LVD) and Single End (SE) type, which electrical specification are based on ANSI SCSI Parallel Interface-3 (SPI-3). LVD supports up to a maximum of 15 SCSI devices on a 12m flat cable. Data transfer rates is up to 160Mbyte/sec. LVD driver's waveforms are shown in figure 1 and figure 2. Both functionality are properly. But from the view point of timing margin, the heavy SCSI bus configuration (figure 2) becomes bad. Fig.1 LVD Driver Waveform-1 160Mbyte/sec, Cable=1.2m,#of Hard Disk=1) 1