SPI-2 Rev08 Questions (forwarded)
John Lohmeyer - SCSI
jlohmeye at Symbios.COM
Thu Jul 25 15:59:47 PDT 1996
* From the SCSI Reflector, posted by:
* John Lohmeyer - SCSI <jlohmeye>
I found this posting bounced to the administrator account
for the SCSI reflector (presumably because majordomo thought
that 'Dear SCSI-ites' looked like an adminitrative request).
Please direct your responses to either the reflector address
scsi at symbios.com or to Paul A. Levin (palevin at netcom.com).
> >From scsi-owner Tue Jul 2 23:03:48 1996
> Received: from mpdgw2.symbios.com ([188.8.131.52]) by Symbios.COM (184.108.40.206/8.6.6) with ESMTP id XAA19325 for <scsi at symbios.com>; Tue, 2 Jul 1996 23:03:48 -0600
> From: palevin at netcom.com
> Received: (from root at localhost) by mpdgw2.symbios.com (220.127.116.11/8.6.6) id XAA02754 for <scsi at symbios.com>; Tue, 2 Jul 1996 23:03:49 -0600
> Received: from netcom8.netcom.com(18.104.22.168) by mpdgw2.symbios.com via smap (V1.3)
> id sma002739; Tue Jul 2 23:03:22 1996
> Received: from palevin.slip.netcom.com (palevin.slip.netcom.com [22.214.171.124]) by netcom8.netcom.com (8.6.13/Netcom)
> id WAA05955; Tue, 2 Jul 1996 22:03:18 -0700
> Date: Tue, 2 Jul 96 21:53:21 PDT
> Subject: SPI-2 Rev08 Questions
> To: scsi at symbios.com
> X-PRIORITY: 3 (Normal)
> X-Mailer: Chameleon 4.6.3, TCP/IP for Windows, NetManage Inc.
> Message-ID: <Chameleon.960702220227.palevin at palevin.slip.netcom.com>
> MIME-Version: 1.0
> Content-Type: TEXT/PLAIN; charset=US-ASCII
> Dear SCSI-ites,
> Could someone please help me to understand some of the timing specifications found
> in Rev08? Page 35 specifies minimum assertion and negation periods for FAST-40 to
> be 8.0 nsec at the driver connector and 6.5 nsec at the receiver connector.
> Figure 20 (on page 36) seems to indicate minimum setup and hold times (or is it a
> setup time plus a hold time?) of 9.25 nsec at the driver connector and 4.75 nsec
> at the receiver connector. There are similar discrepancies for FAST-80.
> What, pray tell, are the correct timings?
> Also, is there any differential transceiver available which meets the FAST-40 spec?
> Thank you for any information.
> Paul A. Levin
> (palevin at netcom.com)
More information about the T10