Posted: circuit design example

Leete, Brian A brian.a.leete at
Thu Sep 10 13:31:29 PDT 2009

* From the T10 Reflector (t10 at, posted by:
* "Leete, Brian A" <brian.a.leete at>
Thank you for posting this diagram. 
>From this diagram it looks like the resistor in the drive changes depending
on whether or not the drive is in a manufacturing environment. This means
that the drive must be physically configured for manufacturing test. I assume
a shipping drive will have jumpers on the motherboard or some similar
Is this an acceptable solution for drive manufacturers? 
-----Original Message-----
From: keiji_katata at
[mailto:keiji_katata at] 
Sent: Thursday, September 10, 2009 7:10 AM
To: mtfuji5 at
Cc: t10 at; Frank.Chu at; Leete, Brian A
Subject: Posted: circuit design example
Hello all,
I posted circuit design example on ftp.
There are two notes.
Note 1:
 The circuit design and the value of registor(s) are example. Drive vender
have other parts or different value of registor(s).
Note 2:
 VCC of 3.3V is requierment from drive venders. Because IC of drives will use
3.3V VCC.
Best regards,
Keiji Katata
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