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Senyal de rellotge - Viquipèdia, l'enciclopèdia lliure

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[n]" accesskey="n"><span>Discussió per aquest IP</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"><!-- CentralNotice --></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Lloc"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Contingut" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Contingut</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">amaga</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inici</div> </a> </li> <li id="toc-Freqüència_de_rellotge_dels_processadors" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Freqüència_de_rellotge_dels_processadors"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Freqüència de rellotge dels processadors</span> </div> </a> <ul id="toc-Freqüència_de_rellotge_dels_processadors-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Referències" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referències"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Referències</span> </div> </a> <ul id="toc-Referències-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Enllaços_externs" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Enllaços_externs"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Enllaços externs</span> </div> </a> <ul id="toc-Enllaços_externs-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contingut" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Commuta la taula de continguts." > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Commuta la taula de continguts.</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Senyal de rellotge</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vés a un article en una altra llengua. Disponible en 25 llengües" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-25" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">25 llengües</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A5%D8%B4%D8%A7%D8%B1%D8%A9_%D8%A7%D9%84%D8%B3%D8%A7%D8%B9%D8%A9" title="إشارة الساعة - àrab" lang="ar" hreflang="ar" data-title="إشارة الساعة" data-language-autonym="العربية" data-language-local-name="àrab" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A2%D0%B0%D0%BA%D1%82%D0%BE%D0%B2_%D1%81%D0%B8%D0%B3%D0%BD%D0%B0%D0%BB" title="Тактов сигнал - búlgar" lang="bg" hreflang="bg" data-title="Тактов сигнал" data-language-autonym="Български" data-language-local-name="búlgar" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Hodinov%C3%BD_sign%C3%A1l" title="Hodinový signál - txec" lang="cs" hreflang="cs" data-title="Hodinový signál" data-language-autonym="Čeština" data-language-local-name="txec" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Taktsignal" title="Taktsignal - alemany" lang="de" hreflang="de" data-title="Taktsignal" data-language-autonym="Deutsch" data-language-local-name="alemany" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Clock_signal" title="Clock signal - anglès" lang="en" hreflang="en" data-title="Clock signal" data-language-autonym="English" data-language-local-name="anglès" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Se%C3%B1al_de_reloj" title="Señal de reloj - espanyol" lang="es" hreflang="es" data-title="Señal de reloj" data-language-autonym="Español" data-language-local-name="espanyol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Taktsignaal" title="Taktsignaal - estonià" lang="et" hreflang="et" data-title="Taktsignaal" data-language-autonym="Eesti" data-language-local-name="estonià" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%DB%8C%DA%AF%D9%86%D8%A7%D9%84_%D8%B3%D8%A7%D8%B9%D8%AA" title="سیگنال ساعت - persa" lang="fa" hreflang="fa" data-title="سیگنال ساعت" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Signal_d%27horloge" title="Signal d&#039;horloge - francès" lang="fr" hreflang="fr" data-title="Signal d&#039;horloge" data-language-autonym="Français" data-language-local-name="francès" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%90%D7%95%D7%AA_%D7%A9%D7%A2%D7%95%D7%9F" title="אות שעון - hebreu" lang="he" hreflang="he" data-title="אות שעון" data-language-autonym="עברית" data-language-local-name="hebreu" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/%C3%93rajel" title="Órajel - hongarès" lang="hu" hreflang="hu" data-title="Órajel" data-language-autonym="Magyar" data-language-local-name="hongarès" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Clock" title="Clock - italià" lang="it" hreflang="it" data-title="Clock" data-language-autonym="Italiano" data-language-local-name="italià" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%82%AF%E3%83%AD%E3%83%83%E3%82%AF" title="クロック - japonès" lang="ja" hreflang="ja" data-title="クロック" data-language-autonym="日本語" data-language-local-name="japonès" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%81%B4%EB%9F%AD_%EC%8B%A0%ED%98%B8" title="클럭 신호 - coreà" lang="ko" hreflang="ko" data-title="클럭 신호" data-language-autonym="한국어" data-language-local-name="coreà" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Klokke_(elektronikk)" title="Klokke (elektronikk) - noruec bokmål" lang="nb" hreflang="nb" data-title="Klokke (elektronikk)" data-language-autonym="Norsk bokmål" data-language-local-name="noruec bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Taktowanie" title="Taktowanie - polonès" lang="pl" hreflang="pl" data-title="Taktowanie" data-language-autonym="Polski" data-language-local-name="polonès" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Sinal_de_clock" title="Sinal de clock - portuguès" lang="pt" hreflang="pt" data-title="Sinal de clock" data-language-autonym="Português" data-language-local-name="portuguès" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D0%B0%D0%BA%D1%82%D0%BE%D0%B2%D1%8B%D0%B9_%D1%81%D0%B8%D0%B3%D0%BD%D0%B0%D0%BB" title="Тактовый сигнал - rus" lang="ru" hreflang="ru" data-title="Тактовый сигнал" data-language-autonym="Русский" data-language-local-name="rus" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Hodinov%C3%BD_sign%C3%A1l" title="Hodinový signál - eslovac" lang="sk" hreflang="sk" data-title="Hodinový signál" data-language-autonym="Slovenčina" data-language-local-name="eslovac" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A2%D0%B0%D0%BA%D1%82%D0%BD%D0%B8_%D1%81%D0%B8%D0%B3%D0%BD%D0%B0%D0%BB" title="Тактни сигнал - serbi" lang="sr" hreflang="sr" data-title="Тактни сигнал" data-language-autonym="Српски / srpski" data-language-local-name="serbi" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Klockcykel" title="Klockcykel - suec" lang="sv" hreflang="sv" data-title="Klockcykel" data-language-autonym="Svenska" data-language-local-name="suec" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Saat_i%C5%9Fareti" title="Saat işareti - turc" lang="tr" hreflang="tr" data-title="Saat işareti" data-language-autonym="Türkçe" data-language-local-name="turc" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BD%D1%85%D1%80%D0%BE%D1%81%D0%B8%D0%B3%D0%BD%D0%B0%D0%BB" title="Синхросигнал - ucraïnès" lang="uk" hreflang="uk" data-title="Синхросигнал" data-language-autonym="Українська" data-language-local-name="ucraïnès" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/T%C3%ADn_hi%E1%BB%87u_nh%E1%BB%8Bp" title="Tín hiệu nhịp - vietnamita" lang="vi" hreflang="vi" data-title="Tín hiệu nhịp" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%AE%9A%E6%99%82%E5%99%A8%E8%A8%8A%E8%99%9F" title="定時器訊號 - xinès" lang="zh" hreflang="zh" data-title="定時器訊號" data-language-autonym="中文" data-language-local-name="xinès" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q426882#sitelinks-wikipedia" title="Modifica enllaços interlingües" class="wbc-editpage">Modifica els enllaços</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espais de noms"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a 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vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Eines</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mou a la barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">amaga</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Més opcions" > <div class="vector-menu-heading"> Accions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected 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href="/wiki/Fitxer:Crystal128-pipe.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Crystal128-pipe.svg/25px-Crystal128-pipe.svg.png" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Crystal128-pipe.svg/38px-Crystal128-pipe.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b8/Crystal128-pipe.svg/50px-Crystal128-pipe.svg.png 2x" data-file-width="192" data-file-height="192" /></a></span></td> <td class="mbox-text" style=""> <div class="mbox-text-span">Aquest article o secció no <a href="/wiki/Viquip%C3%A8dia:Citau_les_fonts" title="Viquipèdia:Citau les fonts">cita les fonts</a> o necessita més referències per a la seva <a href="/wiki/VP:VER" class="mw-redirect" title="VP:VER">verificabilitat</a>.</div> </td> </tr> </tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Fitxer:Clock_oscillator_HO-25B_50Mhz.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Clock_oscillator_HO-25B_50Mhz.jpg/220px-Clock_oscillator_HO-25B_50Mhz.jpg" decoding="async" width="220" height="182" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Clock_oscillator_HO-25B_50Mhz.jpg/330px-Clock_oscillator_HO-25B_50Mhz.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Clock_oscillator_HO-25B_50Mhz.jpg/440px-Clock_oscillator_HO-25B_50Mhz.jpg 2x" data-file-width="923" data-file-height="763" /></a><figcaption>Generador de senyal de rellotge HO-25B, de 50Mhz, amb una sortida de nivells lògics de 3.3V compatible amb families lògiques HCMOS i TTL.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup></figcaption></figure> <p>Un <b>senyal de rellotge</b>, en <a href="/wiki/Electr%C3%B2nica_digital" class="mw-redirect" title="Electrònica digital">electrònica digital</a>, és una seqüència que alterna zeros i uns que marca el pas del temps. El que limita el període entre l'inici d'un u i l'altre el limita la rapidesa de les transferències entre registres.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> </p><p>Serveix per coordinar les accions de diversos <a href="/wiki/Circuit_impr%C3%A8s" title="Circuit imprès">circuits</a>, en especial per la sincronització de <a href="/wiki/Biestable" title="Biestable">biestables</a> en <a href="/wiki/Sistemes_digitals" class="mw-redirect" title="Sistemes digitals">sistemes digitals</a> complexos. Segons l'aplicació, el senyal de rellotge es pot repetir amb una <a href="/wiki/Freq%C3%BC%C3%A8ncia" title="Freqüència">freqüència</a> determinada (fixa) o també ser aperiòdica (ser generada per un succés). En els casos en què hi ha un senyal de rellotge, sol donar-se per mitjà d'un <a href="/wiki/Generador_de_rellotge" title="Generador de rellotge">generador de rellotge</a>. El senyal <a href="/wiki/Oscil%C2%B7laci%C3%B3" title="Oscil·lació">oscil·la</a> entre un nivell alt i baix, que es caracteritza per un <a href="/wiki/Per%C3%ADode_d%27oscil%C2%B7laci%C3%B3" title="Període d&#39;oscil·lació">període d'oscil·lació</a> o bé per un valor de canvi, la freqüència de rellotge i el <a href="/wiki/Cicle_de_treball" title="Cicle de treball">cicle de treball</a>. Els <a href="/wiki/Circuit_el%C3%A8ctric" title="Circuit elèctric">circuits</a> que fan servir el senyal de rellotge per sincronitzar-se, poden basar-se en el <a href="/wiki/Flanc" title="Flanc">flanc</a> ascendent o en el descendent del senyal. En el cas de <a href="/w/index.php?title=Double_Data_Rate&amp;action=edit&amp;redlink=1" class="new" title="Double Data Rate (encara no existeix)">Double Data Rate</a> s'utilitzen ambdós flancs. En fulls tècnics i diagrames al senyal de rellotge se'l sol descriure com <i>CLK</i>. </p><p>La majoria de circuits integrats complexos requereixen un senyal de rellotge, per a sincronitzar diferents parts del <a href="/wiki/Circuit_integrat" title="Circuit integrat">xip</a> i equilibrar els retards de les <a href="/wiki/Porta_l%C3%B2gica" title="Porta lògica">portes</a>. Atès que els xips són cada vegada més complexos, és cada vegada més difícil proveir d'un senyal de rellotge precís i homogeni a tot arreu. Exemple il·lustratiu d'aquest problema són els <a href="/wiki/Microprocessadors" class="mw-redirect" title="Microprocessadors">microprocessadors</a>, component central dels ordinadors moderns. Per als <a href="/wiki/Transistors" class="mw-redirect" title="Transistors">transistors</a> se sol indicar la freqüència fins a la que és possible amplificar un petit senyal. Aquesta sol ser deu vegades major a la freqüència de rellotge. </p> <div class="mw-heading mw-heading2"><h2 id="Freqüència_de_rellotge_dels_processadors"><span id="Freq.C3.BC.C3.A8ncia_de_rellotge_dels_processadors"></span>Freqüència de rellotge dels processadors</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Senyal_de_rellotge&amp;action=edit&amp;section=1" title="Modifica la secció: Freqüència de rellotge dels processadors"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r30997230">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}</style><div role="note" class="hatnote navigation-not-searchable">Article principal: <a href="/wiki/Freq%C3%BC%C3%A8ncia_de_rellotge" title="Freqüència de rellotge">freqüència de rellotge</a></div> <p>La freqüència de rellotge és el ritme amb què es tramiten les dades en un ordinador, i es mesura a en <a href="/wiki/Hertz" title="Hertz">hertz</a>. Atès que la freqüència dels processadors moderns arriba a milers de milions d'hertzs, les quantitats solen representar-se amb l'ajuda de <a href="/wiki/Prefixos_del_SI" class="mw-redirect" title="Prefixos del SI">prefixos</a> com giga (G) per a milers de milions i mega (M) per a milions (mentre que per als <a href="/wiki/Sistema_incrustat" title="Sistema incrustat">sistemes embedded</a> encara és freqüent parlar de kHz). </p><p>Per exemple, una freqüència de rellotge d'1 GHz significa un període de rellotge d'un <a href="/wiki/Prefixos_del_SI" class="mw-redirect" title="Prefixos del SI">nanosegon</a>. El flux de dades d'un processador és de la freqüència de rellotge i del flux de dades quan es connecta amb la memòria principal. Les prestacions de càlcul (mesures per exemple en <a href="/wiki/Instruccions_per_segon" title="Instruccions per segon">instruccions per segon</a> (MIPS) o en <a href="/wiki/FLOPS" title="FLOPS">FLOPS</a>) no només depèn de la freqüència de rellotge, sinó també de l'arquitectura de tot el processador. Fins i tot aquells processadors que utilitzen el mateix <a href="/wiki/Conjunt_d%27instruccions" title="Conjunt d&#39;instruccions">conjunt d'instruccions</a>, poden comptar amb prestacions molt diferents tot i tenir la mateixa freqüència de rellotge, motivades, per exemple, per la quantitat d'<a href="/wiki/Instruccions_per_cicle" title="Instruccions per cicle">instruccions per cicle</a> (IPC), per característiques pròpies del fabricant (per exemple, ampliacions de <a href="/wiki/SIMD" title="SIMD">SIMD</a>) o pel ja esmentat flux de la memòria. El flux d'IPC especifica totes les instruccions que pot executar un processador gràcies a la <a href="/w/index.php?title=Model_de_programaci%C3%B3_paral%C2%B7lel&amp;action=edit&amp;redlink=1" class="new" title="Model de programació paral·lel (encara no existeix)">fer-les en paral·lel</a>. Un processador amb un flux d'IPC més, fa més operacions de càlcul i calcula de forma més ràpida. </p> <div class="mw-heading mw-heading2"><h2 id="Referències"><span id="Refer.C3.A8ncies"></span>Referències</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Senyal_de_rellotge&amp;action=edit&amp;section=2" title="Modifica la secció: Referències"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><span class="citation" style="font-style:normal">«<a rel="nofollow" class="external text" href="https://web.archive.org/web/20160424034555/http://scsiglobal.com/Hosonic/Documents/SCSI-HO-22%2625.pdf">Full de dades dels oscil·ladors HO-22 i HO-25</a>»&#32;(en anglès). Arxivat de l'<a rel="nofollow" class="external text" href="http://www.scsiglobal.com/Hosonic/Documents/SCSI-HO-22&amp;25.pdf">original</a> el 24 abril 2016.&#32;[Consulta: 22 juliol 2019].</span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><span class="citation book" style="font-style:normal" id="CITEREFXirgo2000"><span style="font-variant: small-caps;">Xirgo</span>, Lluís Ribas. <a rel="nofollow" class="external text" href="https://books.google.cat/books?id=kvKB-6DDlFgC&amp;newbks=0&amp;printsec=frontcover&amp;pg=PA50&amp;dq=%22senyal+de+rellotge%22&amp;hl=ca"><i>Pràctiques de fonaments de computadors</i></a>.&#32; Univ. Autònoma de Barcelona,&#32;2000,&#32;p.&#160;50. <span style="font-size:90%; white-space:nowrap;"><a href="/wiki/Especial:Fonts_bibliogr%C3%A0fiques/978-84-490-1767-4" title="Especial:Fonts bibliogràfiques/978-84-490-1767-4">ISBN 978-84-490-1767-4</a></span>.</span><span class="Z3988" title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=book&amp;rft.btitle=Pr%C3%A0ctiques+de+fonaments+de+computadors&amp;rft.aulast=Xirgo&amp;rft.aufirst=Llu%C3%ADs+Ribas&amp;rft.date=2000&amp;rft.pub=Univ.+Aut%C3%B2noma+de+Barcelona&amp;rft.pages=50&amp;rft.isbn=978-84-490-1767-4&amp;rft_id=https%3A%2F%2Fbooks.google.cat%2Fbooks%3Fid%3DkvKB-6DDlFgC%26newbks%3D0%26printsec%3Dfrontcover%26pg%3DPA50%26dq%3D%2522senyal%2Bde%2Brellotge%2522%26hl%3Dca"><span style="display: none;">&#160;</span></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Enllaços_externs"><span id="Enlla.C3.A7os_externs"></span>Enllaços externs</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Senyal_de_rellotge&amp;action=edit&amp;section=3" title="Modifica la secció: Enllaços externs"><span>modifica</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://www.elektronik-kompendium.de/public/schaerer/ast555.htm">50%-Duty-Cycle-Generator mit dem LMC555</a></li> <li><a rel="nofollow" class="external text" href="http://www.elektronik-kompendium.de/public/schaerer/vco.htm">Spannungsgesteuerter Rechteckgenerator mit dem CD4046B oder MC14046B</a></li></ul> <p><span style="display: none;" class="interProject"><a href="https://ca.wiktionary.org/wiki/senyal_de_rellotge" class="extiw" title="wikt:senyal de rellotge">Viccionari</a></span> </p> <div role="navigation" class="navbox" aria-label="Navbox" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="row" class="navbox-group" style="width:1%">Bases d'informació</th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a href="/wiki/GEC" class="mw-redirect" title="GEC">GEC</a> <span class="uid"> (<a rel="nofollow" class="external text" href="https://www.enciclopedia.cat/gran-enciclopedia-catalana/senyal-de-rellotge">1</a>)</span></li></ul> </div></td></tr></tbody></table></div> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐55c745c8db‐v5k6t Cached time: 20241212154145 Cache expiry: 2592000 Reduced expiry: false Complications: [] CPU time usage: 0.121 seconds Real time usage: 0.504 seconds Preprocessor visited node count: 771/1000000 Post‐expand include size: 6829/2097152 bytes Template argument size: 2323/2097152 bytes Highest expansion depth: 12/100 Expensive parser function count: 1/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 2645/5000000 bytes Lua time usage: 0.044/10.000 seconds Lua memory usage: 1604002/52428800 bytes Number of Wikibase entities loaded: 1/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 141.450 1 -total 41.96% 59.346 1 Plantilla:Referències 29.21% 41.323 1 Plantilla:Cita_web 23.97% 33.905 1 Plantilla:Article_principal 23.84% 33.723 1 Plantilla:Ref-web 23.54% 33.292 1 Plantilla:Autoritat 8.07% 11.420 1 Plantilla:Ref-llibre 6.70% 9.483 1 Plantilla:Data_consulta 5.37% 7.602 1 Plantilla:Falten_referències 2.23% 3.149 2 Plantilla:If_both --> <!-- Saved in parser cache with key cawiki:pcache:784182:|#|:idhash:canonical and timestamp 20241212154145 and revision id 34097567. 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