Darrel,
I am not aware of any serious cons of a single scan chain other than
the code is more involved. I once worked for a company a while back that
preferred a connector for each device because they were afraid of long
JTAG routes. Most places I have seen since use a single chain though.
Ken
--------------------------------------------
Kenneth J. Wood C.I.D.
Saturn PCB Design
www.saturnpcb.com
407-340-2668


----- Original Message -----
From: "Darrel Therriault" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, February 17, 2006 1:52 PM
Subject: [TN] JTAG Scan Chains


> Technetters,
>
> We are evaluating different implementations of JTAG/BSCAN and I was
> wondering about any pros and cons of a single scan chain vs multiple scan
> chains on a board.
>
> If anyone has any horror stories or do's and don'ts, I would appreciate
> the insight and opinions.
>
>
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> -----------------------------------------------------
> Thanks....DJT

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