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Message
From: anon at anon.com<anon@a...>
Date: Thu Oct 28 17:50:15 CEST 2004
Subject: [oc] XILINX easypath solutions
I don't have experience of Xilinx easypath, but I do have one or two
things to offer in response to your questions:
Xilinx easypath is a service where Xilinx reduces its post-manufacture
test set to only cover the device's suitability for a particular
bitstream. So, when a product is ready to go to market, the customer
provides Xilinx with their bitstream and it is used to confidently
pass devices that would otherwise be failed.
A trivial example: A design uses only 80% of the embedded multiplier
units in a Virtex II part. As long as the multipliers made use of are
operational who cares if the other multipliers are working? Note that
if the bitstream changes (e.g. bug correction) there is no guarantee
that it will work on easypath devices passed for the initial bitstream.
It is interesting to note that over 90% of the programmability in the
routing fabric is effectively "don't care" for any single design.
Usually the device must be tested to ensure that all features are
working before it can be shipped to the customer.
I would bet Xilinx only offers Easypath on the larger devices. This is
because manufacturing defects increase with the silicon area of the
device. The smaller devices will have close to 100% yield and there is
nothing to be gained from reducing the test set through easypath.
----- Original Message -----
From: unmesh<unmesh@s...>
To:
Date: Thu Oct 28 06:52:46 CEST 2004
Subject: [oc] XILINX easypath solutions
> Hi All
> if wonder if anyone has any info on XILINX easypath solutions?
> have there been any design tape outs on easypath FPGAs.
> Thanks and regards
> Unmesh
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