[Fwd: Re: [Fwd: [HARDWARE] Just Courious......]]

Robert Norton rjn at execpc.com
Fri Sep 17 18:26:14 EDT 1999


"Chi K. Chan" wrote:

> I don't know much about FPGAs, are they programmable like CPUs, or are they
> only one time programmable?

Both kinds are available.

> How about a board that can hold a number PowerPC based microcontrollers?
> PowerPC chips are known to give good key rates per sec, and the embedded
> version of the chip might have enough on chip RAM and I/O to cut down on
> chip count and cost.
>
> About a year ago, someone mentioned using a DSP chip to process keys,
> I think it was using a SHARC chip from Analog devices.  Any news on that ?

Both DSP's and Power PC's can only execute one instruction (or a few at most) at a
time.  An FPGA can implement all the steps of the algorithm with each clock tick if
the process is fully unrolled.  This can give you a massive speedup.

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