Re: Scan chains

On Wed, 7 May 2025 19:03:31 +0000, Stefan Monnier wrote:

What's the approximate cost of those scan chains.  I.e. if we were to
take an existing working design and replace all the "flip-flop with
scan-chain" with "plain flip-flops", how much smaller would the
resulting chip be, how much faster could it run, and how much less power
could it consume?

Given a 16-gate delay design with 5 gates of "flop-jitter-skew"
the scan path adds about ½ a gate of delay (2%-ish).

>
Almost lost in the noise.  Thanks.

Such a big gain in debugging, such a small penalty for use ...

>
        Stefan