To: bobdsmith; GSHastings
FPGA are one of the things I design.
FPGAs are not circuit boards but macro cells composed of
flip-flops etched on a silicon substrate just like any other I.C.
Their akin to dynamic memories or state machines.
Their logic algorithms are usually written in Verilog
or a graphical state timing cad language such as Modelsim
(by a human designer).
By leaving some of their MOS inputs un-terminated
they may react to random external electro magnetic stimulus.
The algorithm (state) is stored in a serial flash memory
and loaded into the FPGA on initialization.
With out a clock their serial flash could never load their
algorithm nor could they toggle their flip-flop CLB and output latches.
They are so dependent on clocking most contain a digital clock manager (DCM).
While this may work with a gate array it simply will not
with a FPGA.
Which leads me to to my point.
Your article (post 400) is complete bunko.....
If I were you I would refrain from using it in the future
since even the first sentence is in error.
BTW as a scientist and design engineer I am also a Christian and believe in GOD's creation.
I get along fine. And I have faith and hope..
504 posted on
08/17/2005 1:19:29 AM PDT by
DaveTesla
(You can fool some of the people some of the time......)
To: DaveTesla
I am well aware of what a FPGA is.
With out a clock their serial flash could never load their algorithm nor could they toggle their flip-flop CLB and output latches. They are so dependent on clocking most contain a digital clock manager (DCM). While this may work with a gate array it simply will not with a FPGA.
They never claimed a clock wasn't part of the FPGA. This is not the clock they are talking about. They are talking about a clock being used when the algorithm is running. The software contains no clock, nor are external clocks used as input.
The paper is found here: http://www.informatics.sussex.ac.uk/users/adrianth/ices98/node1.html
The logic layout (of the final design):
To: DaveTesla
FPGA are one of the things I design. snip
Your article (post 400) is complete bunko.....
If I were you I would refrain from using it in the future since even the first sentence is in error.
I'm not sure this message was intended for me. I didn't post the article in #400. (although I did respond to it).
If it is intended for me, then I guess I'm confuseled.
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