Re: Scan chains (was: control co-processor)

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Sujet : Re: Scan chains (was: control co-processor)
De : aek (at) *nospam* bitsavers.org (Al Kossow)
Groupes : comp.arch
Date : 07. May 2025, 05:08:41
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <vvemc9$jl19$1@dont-email.me>
References : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
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On 5/6/25 8:12 PM, 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?
I wouldn't matter because it wouldn't be testable in production.

Date Sujet#  Auteur
7 Sep 24 * Tonights Tradeoff99Robert Finch
7 Sep 24 `* Re: Tonights Tradeoff98MitchAlsup1
8 Sep 24  `* Re: Tonights Tradeoff97Robert Finch
8 Sep 24   `* Re: Tonights Tradeoff96MitchAlsup1
10 Sep 24    `* Re: Tonights Tradeoff95Robert Finch
10 Sep 24     +* Re: Tonights Tradeoff17BGB
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10 Sep 24     ii+* Re: Tonights Tradeoff10BGB
11 Sep 24     iii`* Re: Tonights Tradeoff9Robert Finch
11 Sep 24     iii +* Re: Tonights Tradeoff7Stephen Fuld
11 Sep 24     iii i+- Re: Tonights Tradeoff1MitchAlsup1
12 Sep 24     iii i`* Re: Tonights Tradeoff5Robert Finch
12 Sep 24     iii i `* Re: Tonights Tradeoff4MitchAlsup1
12 Sep 24     iii i  `* Re: Tonights Tradeoff3Robert Finch
12 Sep 24     iii i   `* Re: Tonights Tradeoff2MitchAlsup1
13 Sep 24     iii i    `- Re: Tonights Tradeoff1MitchAlsup1
12 Sep 24     iii `- Re: Tonights Tradeoff1BGB
11 Sep 24     ii`- Re: Tonights Tradeoff1MitchAlsup1
11 Sep 24     i`* Re: Tonights Tradeoff4MitchAlsup1
12 Sep 24     i `* Re: Tonights Tradeoff3Thomas Koenig
12 Sep 24     i  `* Re: Tonights Tradeoff2BGB
12 Sep 24     i   `- Re: Tonights Tradeoff1Robert Finch
11 Sep 24     `* Re: Tonights Tradeoff77MitchAlsup1
15 Sep 24      `* Re: Tonights Tradeoff76Robert Finch
16 Sep 24       `* Re: Tonights Tradeoff75Robert Finch
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24 Sep 24         `* Re: Tonights Tradeoff - Background Execution Buffers73MitchAlsup1
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27 Sep 24            `* Re: Tonights Tradeoff - Background Execution Buffers70Robert Finch
4 Oct 24             `* Re: Tonights Tradeoff - Background Execution Buffers69Robert Finch
4 Oct 24              +* Re: Tonights Tradeoff - Background Execution Buffers66Anton Ertl
4 Oct 24              i`* Re: Tonights Tradeoff - Background Execution Buffers65Robert Finch
5 Oct 24              i `* Re: Tonights Tradeoff - Background Execution Buffers64Anton Ertl
9 Oct 24              i  `* Re: Tonights Tradeoff - Background Execution Buffers63Robert Finch
9 Oct 24              i   +* Re: Tonights Tradeoff - Background Execution Buffers3MitchAlsup1
9 Oct 24              i   i+- Re: Tonights Tradeoff - Background Execution Buffers1Robert Finch
12 Oct 24              i   i`- Re: Tonights Tradeoff - Background Execution Buffers1BGB
12 Oct 24              i   +* Re: Tonights Tradeoff - Carry and Overflow58Robert Finch
12 Oct 24              i   i`* Re: Tonights Tradeoff - Carry and Overflow57MitchAlsup1
12 Oct 24              i   i `* Re: Tonights Tradeoff - Carry and Overflow56BGB
12 Oct 24              i   i  `* Re: Tonights Tradeoff - Carry and Overflow55Robert Finch
13 Oct 24              i   i   +* Re: Tonights Tradeoff - Carry and Overflow3MitchAlsup1
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13 Oct 24              i   i   i `- Re: Tonights Tradeoff - ATOM1MitchAlsup1
13 Oct 24              i   i   +- Re: Tonights Tradeoff - Carry and Overflow1BGB
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31 Oct 24              i   i    +- Re: Page fetching cache controller1MitchAlsup1
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17 Apr 25              i   i     `* Re: register sets47Robert Finch
17 Apr 25              i   i      `* Re: register sets46Stephen Fuld
17 Apr 25              i   i       +- Re: register sets1Robert Finch
17 Apr 25              i   i       `* Re: register sets44MitchAlsup1
18 Apr 25              i   i        `* Re: register sets43Robert Finch
18 Apr 25              i   i         `* Re: register sets42MitchAlsup1
20 Apr 25              i   i          `* Re: register sets41Robert Finch
21 Apr 25              i   i           `* Re: auto predicating branches40Robert Finch
21 Apr 25              i   i            `* Re: auto predicating branches39Anton Ertl
21 Apr 25              i   i             +- Is an instruction on the critical path? (was: auto predicating branches)1Anton Ertl
21 Apr 25              i   i             `* Re: auto predicating branches37MitchAlsup1
22 Apr 25              i   i              `* Re: auto predicating branches36Anton Ertl
22 Apr 25              i   i               +- Re: auto predicating branches1MitchAlsup1
22 Apr 25              i   i               `* Re: auto predicating branches34Anton Ertl
22 Apr 25              i   i                `* Re: auto predicating branches33MitchAlsup1
23 Apr 25              i   i                 +* Re: auto predicating branches3Stefan Monnier
23 Apr 25              i   i                 i`* Re: auto predicating branches2Anton Ertl
25 Apr 25              i   i                 i `- Re: auto predicating branches1MitchAlsup1
23 Apr 25              i   i                 `* Re: auto predicating branches29Anton Ertl
23 Apr 25              i   i                  `* Re: auto predicating branches28MitchAlsup1
24 Apr 25              i   i                   `* Re: asynch register rename27Robert Finch
27 Apr 25              i   i                    `* Re: fractional PCs26Robert Finch
27 Apr 25              i   i                     `* Re: fractional PCs25MitchAlsup1
28 Apr 25              i   i                      `* Re: fractional PCs24Robert Finch
28 Apr 25              i   i                       +* Re: fractional PCs13MitchAlsup1
29 Apr 25              i   i                       i`* Re: fractional PCs12Robert Finch
5 May 25              i   i                       i `* Re: control co-processor11Robert Finch
5 May 25              i   i                       i  `* Re: control co-processor10Al Kossow
5 May 25              i   i                       i   `* Re: control co-processor9Stefan Monnier
6 May 25              i   i                       i    +* Re: control co-processor2MitchAlsup1
7 May 25              i   i                       i    i`- Re: control co-processor1MitchAlsup1
7 May 25              i   i                       i    `* Scan chains (was: control co-processor)6Stefan Monnier
7 May 25              i   i                       i     +* Re: Scan chains (was: control co-processor)2Al Kossow
7 May 25              i   i                       i     i`- Re: Scan chains1Stefan Monnier
7 May 25              i   i                       i     `* Re: Scan chains3MitchAlsup1
7 May 25              i   i                       i      `* Re: Scan chains2Stefan Monnier
8 May 25              i   i                       i       `- Re: Scan chains1MitchAlsup1
29 Apr 25              i   i                       `* Re: fractional PCs10Robert Finch
29 Apr 25              i   i                        `* Re: fractional PCs9MitchAlsup1
30 Apr 25              i   i                         `* Re: fractional PCs8Robert Finch
30 Apr 25              i   i                          +* Re: fractional PCs6Thomas Koenig
1 May 25              i   i                          i+- Re: fractional PCs1Robert Finch
2 May 25              i   i                          i`* Re: fractional PCs4moi
2 May 25              i   i                          i +* Re: millicode, extracode, fractional PCs2John Levine
2 May 25              i   i                          i i`- Re: millicode, extracode, fractional PCs1moi
2 May 25              i   i                          i `- Re: fractional PCs1moi
30 Apr 25              i   i                          `- Re: fractional PCs1MitchAlsup1
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6 Oct 24              `- Re: Tonights Tradeoff - Background Execution Buffers1MitchAlsup1

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