Re: Scan chains

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Sujet : Re: Scan chains
De : monnier (at) *nospam* iro.umontreal.ca (Stefan Monnier)
Groupes : comp.arch
Date : 07. May 2025, 20:03:31
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <jwvwmas1by1.fsf-monnier+comp.arch@gnu.org>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
User-Agent : Gnus/5.13 (Gnus v5.13)
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.


        Stefan

Date Sujet#  Auteur
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31 Oct 24 +- Re: Page fetching cache controller1MitchAlsup1
6 Nov 24 `* Re: Q+ Fibonacci57Robert Finch
17 Apr 25  `* Re: register sets56Robert Finch
17 Apr 25   +* Re: register sets53Stephen Fuld
17 Apr 25   i+- Re: register sets1Robert Finch
17 Apr 25   i+* Re: register sets46MitchAlsup1
18 Apr 25   ii`* Re: register sets45Robert Finch
18 Apr 25   ii `* Re: register sets44MitchAlsup1
20 Apr 25   ii  `* Re: register sets43Robert Finch
21 Apr 25   ii   `* Re: auto predicating branches42Robert Finch
21 Apr 25   ii    `* Re: auto predicating branches41Anton Ertl
21 Apr 25   ii     +- Is an instruction on the critical path? (was: auto predicating branches)1Anton Ertl
21 Apr 25   ii     `* Re: auto predicating branches39MitchAlsup1
22 Apr 25   ii      `* Re: auto predicating branches38Anton Ertl
22 Apr 25   ii       +- Re: auto predicating branches1MitchAlsup1
22 Apr 25   ii       `* Re: auto predicating branches36Anton Ertl
22 Apr 25   ii        `* Re: auto predicating branches35MitchAlsup1
23 Apr 25   ii         +* Re: auto predicating branches3Stefan Monnier
23 Apr 25   ii         i`* Re: auto predicating branches2Anton Ertl
25 Apr 25   ii         i `- Re: auto predicating branches1MitchAlsup1
23 Apr 25   ii         `* Re: auto predicating branches31Anton Ertl
23 Apr 25   ii          `* Re: auto predicating branches30MitchAlsup1
24 Apr 25   ii           `* Re: asynch register rename29Robert Finch
27 Apr 25   ii            `* Re: fractional PCs28Robert Finch
27 Apr 25   ii             `* Re: fractional PCs27MitchAlsup1
28 Apr 25   ii              `* Re: fractional PCs26Robert Finch
28 Apr 25   ii               +* Re: fractional PCs15MitchAlsup1
29 Apr 25   ii               i`* Re: fractional PCs14Robert Finch
5 May 25   ii               i `* Re: control co-processor13Robert Finch
5 May 25   ii               i  `* Re: control co-processor12Al Kossow
5 May 25   ii               i   `* Re: control co-processor11Stefan Monnier
6 May 25   ii               i    +* Re: control co-processor3MitchAlsup1
7 May 25   ii               i    i+- Re: control co-processor1MitchAlsup1
15 Jul 25   ii               i    i`- Re: control co-processor1MitchAlsup1
7 May 25   ii               i    `* Scan chains (was: control co-processor)7Stefan Monnier
7 May 25   ii               i     +* Re: Scan chains (was: control co-processor)2Al Kossow
7 May 25   ii               i     i`- Re: Scan chains1Stefan Monnier
7 May 25   ii               i     +* Re: Scan chains3MitchAlsup1
7 May 25   ii               i     i`* Re: Scan chains2Stefan Monnier
8 May 25   ii               i     i `- Re: Scan chains1MitchAlsup1
15 Jul 25   ii               i     `- Re: Scan chains1MitchAlsup1
29 Apr 25   ii               `* Re: fractional PCs10Robert Finch
29 Apr 25   ii                `* Re: fractional PCs9MitchAlsup1
30 Apr 25   ii                 `* Re: fractional PCs8Robert Finch
30 Apr 25   ii                  +* Re: fractional PCs6Thomas Koenig
1 May 25   ii                  i+- Re: fractional PCs1Robert Finch
2 May 25   ii                  i`* Re: fractional PCs4moi
2 May 25   ii                  i +* Re: millicode, extracode, fractional PCs2John Levine
2 May 25   ii                  i i`- Re: millicode, extracode, fractional PCs1moi
2 May 25   ii                  i `- Re: fractional PCs1moi
30 Apr 25   ii                  `- Re: fractional PCs1MitchAlsup1
15 Jul 25   i`* Re: register sets5John Savard
15 Jul 25   i `* Re: register sets4MitchAlsup1
19 Jul 25   i  `* Re: register sets3Robert Finch
19 Jul 25   i   `* Re: register sets2Anton Ertl
19 Jul 25   i    `- Re: register sets1MitchAlsup1
15 Jul 25   `* Re: register sets2John Savard
15 Jul 25    `- Re: register sets1MitchAlsup1

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