{"id":2280,"date":"2024-08-10T12:41:52","date_gmt":"2024-08-10T12:41:52","guid":{"rendered":"https:\/\/tryvary.com\/?p=2280"},"modified":"2024-08-10T12:41:52","modified_gmt":"2024-08-10T12:41:52","slug":"pcb-testability-design-guidelines-and-rules","status":"publish","type":"post","link":"https:\/\/tryvary.com\/cs\/pokyny-a-pravidla-pro-navrh-testovatelnosti-pcb\/","title":{"rendered":"Design pro testovatelnost: z\u00e1kladn\u00ed pokyny a pravidla"},"content":{"rendered":"<p>Design for Testability (DFT) je kritick\u00e1 in\u017een\u00fdrsk\u00e1 discipl\u00edna, kter\u00e1 umo\u017e\u0148uje efektivn\u00ed <strong>detekce a izolace chyb<\/strong> v desk\u00e1ch plo\u0161n\u00fdch spoj\u016f (PCB). Efektivn\u00ed DFT zahrnuje strategick\u00e9 \u00favahy <strong>testovac\u00ed procesy<\/strong>, efektivn\u00ed um\u00edst\u011bn\u00ed zku\u0161ebn\u00edch bod\u016f a dodr\u017eov\u00e1n\u00ed po\u017eadavk\u016f na v\u016fli. S t\u00edm souvis\u00ed i v\u00fdb\u011br toho spr\u00e1vn\u00e9ho <strong>testovac\u00ed metoda<\/strong>, jako jsou ICT nebo l\u00e9taj\u00edc\u00ed sonda, a sledov\u00e1n\u00ed <strong>osv\u011bd\u010den\u00e9 postupy<\/strong> pro DFM a DFT. Dodr\u017eov\u00e1n\u00edm z\u00e1kladn\u00edch pokyn\u016f a pravidel mohou n\u00e1vrh\u00e1\u0159i zaru\u010dit d\u016fkladn\u00e9 pokryt\u00ed test\u016f, izolaci chyb a sn\u00ed\u017een\u00ed v\u00fdrobn\u00edch chyb a n\u00e1klad\u016f. Jak prozkoum\u00e1v\u00e1me spletitost DFT, d\u016fle\u017eitost pe\u010dliv\u00e9ho pl\u00e1nov\u00e1n\u00ed a prov\u00e1d\u011bn\u00ed se st\u00e1v\u00e1 st\u00e1le evidentn\u011bj\u0161\u00ed a odhaluje nuance t\u00e9to slo\u017eit\u00e9 discipl\u00edny.<\/p>\n<h2>Kl\u00ed\u010dov\u00e9 v\u011bci<\/h2>\n<ul>\n<li>Dodr\u017eujte z\u00e1kladn\u00ed pravidla DFT pro n\u00e1vrh testovac\u00edch bod\u016f, abyste zajistili \u00fa\u010dinnou detekci a izolaci chyb.<\/li>\n<li>Zajist\u011bte minim\u00e1ln\u00ed vzd\u00e1lenost 50 mil od sou\u010d\u00e1st\u00ed a stop a 100 mil od okraje desky pro testovac\u00ed body.<\/li>\n<li>Navrhn\u011bte testovac\u00ed body specifick\u00e9 pro s\u00ed\u0165 pro d\u016fkladn\u00e9 testov\u00e1n\u00ed a koordinujte simult\u00e1nn\u00ed testov\u00e1n\u00ed ICT na obou stran\u00e1ch PCB.<\/li>\n<li>Spr\u00e1vn\u00e9 um\u00edst\u011bn\u00ed testovac\u00edch bod\u016f ovliv\u0148uje pokryt\u00ed testu a integritu sign\u00e1lu a zaji\u0161\u0165uje, \u017ee kritick\u00e9 uzly a sign\u00e1ly jsou p\u0159\u00edstupn\u00e9 pro testov\u00e1n\u00ed.<\/li>\n<li>DFT umo\u017e\u0148uje efektivn\u00ed detekci a izolaci chyb, sni\u017euje v\u00fdrobn\u00ed chyby a n\u00e1klady a usnad\u0148uje p\u0159esnou diagnostiku chyb.<\/li>\n<\/ul>\n<h2>Pokyny pro n\u00e1vrh testovatelnosti PCB<\/h2>\n<div class=\"embed-youtube\" style=\"position: relative; width: 100%; height: 0; padding-bottom: 56.25%; margin-bottom:20px;\"><iframe style=\"position: absolute; top: 0; left: 0; width: 100%; height: 100%;\" src=\"https:\/\/www.youtube.com\/embed\/Z9nycymUd-I\" title=\"P\u0159ehr\u00e1va\u010d videa YouTube\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe><\/div>\n<p>Optimalizace rozvr\u017een\u00ed n\u00e1vrhu pro efektivn\u00ed testovac\u00ed procesy, <strong>Pokyny pro testovatelnost PCB<\/strong> poskytnout sadu <strong>strategick\u00e9 \u00favahy<\/strong> pro zaru\u010den\u00ed d\u016fkladn\u00e9ho testov\u00e1n\u00ed a n\u00e1kladov\u011b efektivn\u00ed v\u00fdroby. Tyto pokyny, nezbytn\u00e9 pro <strong>design pro testovatelnost<\/strong>, zam\u011b\u0159te se na strategick\u00e9 um\u00edst\u011bn\u00ed <strong>testovac\u00ed body<\/strong>s ohledem na po\u017eadavky na povolen\u00ed a dodr\u017eov\u00e1n\u00ed doporu\u010den\u00ed smluvn\u00edho v\u00fdrobce (CM). Dodr\u017eov\u00e1n\u00edm t\u011bchto pokyn\u016f se mohou n\u00e1vrh\u00e1\u0159i ujistit, \u017ee testovac\u00ed body na desce s plo\u0161n\u00fdmi spoji (PCB) jsou snadno dostupn\u00e9, co\u017e usnad\u0148uje <strong>d\u016fkladn\u00e9 testovac\u00ed pokryt\u00ed<\/strong> a <strong>izolace poruch<\/strong>.<\/p>\n<p>Efektivn\u00ed n\u00e1vrh PCB pro testovatelnost zahrnuje um\u00edst\u011bn\u00ed testovac\u00edch bod\u016f na m\u00edsta, kter\u00e1 umo\u017e\u0148uj\u00ed efektivn\u00ed testov\u00e1n\u00ed pomoc\u00ed r\u016fzn\u00fdch <strong>zku\u0161ebn\u00ed metody<\/strong>. T\u00edm je zaji\u0161t\u011bno, \u017ee proces testov\u00e1n\u00ed je zefektivn\u011bn a sni\u017euje se celkov\u00fd \u010das v\u00fdroby a n\u00e1klady. Dodr\u017eov\u00e1n\u00ed pokyn\u016f pro testovatelnost nav\u00edc vede ke zv\u00fd\u0161en\u00ed kvality produktu, omezen\u00ed p\u0159epracov\u00e1n\u00ed a zrychlen\u00ed <strong>time-to-market pro PCB sestavy<\/strong>. Za\u010dlen\u011bn\u00edm t\u011bchto pokyn\u016f do procesu n\u00e1vrhu mohou n\u00e1vrh\u00e1\u0159i vytvo\u0159it robustn\u00ed a spolehliv\u00fd n\u00e1vrh PCB, kter\u00fd spl\u0148uje po\u017eadavky modern\u00ed v\u00fdroby.<\/p>\n<h2>ICT test a l\u00e9taj\u00edc\u00ed sonda<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testing_with_ict_equipment.jpg\" alt=\"testov\u00e1n\u00ed s ICT za\u0159\u00edzen\u00edmi\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>V oblasti testov\u00e1n\u00ed desek plo\u0161n\u00fdch spoj\u016f (PCB) se objevily dv\u011b prominentn\u00ed metody: In-Circuit Test (ICT) a Flying Probe, z nich\u017e ka\u017ed\u00e1 vyhovuje odli\u0161n\u00fdm objem\u016fm v\u00fdroby a po\u017eadavk\u016fm.<\/p>\n<p>Testov\u00e1n\u00ed ICT je ide\u00e1ln\u00ed pro velkoobjemovou v\u00fdrobu, nab\u00edz\u00ed mo\u017enosti vysok\u00e9 propustnosti a d\u016fkladn\u00e9 pokryt\u00ed testov\u00e1n\u00edm. Dok\u00e1\u017ee detekovat z\u00e1vady, jako jsou zkraty, chyb\u011bj\u00edc\u00ed sou\u010d\u00e1sti a nespr\u00e1vn\u00e9 um\u00edst\u011bn\u00ed. Syst\u00e9my ICT vy\u017eaduj\u00ed v\u00fdvoj p\u0159\u00edpravk\u016f zalo\u017een\u00fd na slo\u017eitosti, co\u017e m\u016f\u017ee b\u00fdt \u010dasov\u011b n\u00e1ro\u010dn\u00e9. Mohou v\u0161ak pou\u017e\u00edt nap\u00e1jen\u00ed k testov\u00e1n\u00ed funk\u010dnosti analogov\u00fdch\/digit\u00e1ln\u00edch obvod\u016f.<\/p>\n<p>Testov\u00e1n\u00ed l\u00e9taj\u00edc\u00ed sondou je naopak vhodn\u00e9 pro prototypy a malos\u00e9riovou v\u00fdrobu d\u00edky sv\u00e9 flexibilit\u011b p\u0159i testov\u00e1n\u00ed r\u016fzn\u00fdch velikost\u00ed desek. M\u00e1 minim\u00e1ln\u00ed po\u017eadavky na upevn\u011bn\u00ed, co\u017e z n\u011bj \u010din\u00ed n\u00e1kladov\u011b efektivn\u00ed variantu. Testov\u00e1n\u00ed l\u00e9taj\u00edc\u00ed sondou je sice pomalej\u0161\u00ed ne\u017e testov\u00e1n\u00ed ICT, ale je \u00fa\u010dinnou metodou pro mal\u00e9 a\u017e st\u0159edn\u011b velk\u00e9 v\u00fdrobn\u00ed s\u00e9rie.<\/p>\n<table>\n<thead>\n<tr>\n<th style=\"text-align: center\"><strong>Metoda<\/strong><\/th>\n<th style=\"text-align: center\"><strong>Objem v\u00fdroby<\/strong><\/th>\n<th style=\"text-align: center\"><strong>Po\u017eadavky na p\u0159\u00edslu\u0161enstv\u00ed<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td style=\"text-align: center\">ICT<\/td>\n<td style=\"text-align: center\">Velkoobjemov\u00fd<\/td>\n<td style=\"text-align: center\">Komplexn\u00ed v\u00fdvoj p\u0159\u00edslu\u0161enstv\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">L\u00e9taj\u00edc\u00ed sonda<\/td>\n<td style=\"text-align: center\">Maloobjemov\u00e9\/prototypy<\/td>\n<td style=\"text-align: center\">Minim\u00e1ln\u00ed po\u017eadavky na p\u0159\u00edslu\u0161enstv\u00ed<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">ICT<\/td>\n<td style=\"text-align: center\">Vysoce v\u00fdkonn\u00e9 testov\u00e1n\u00ed<\/td>\n<td style=\"text-align: center\">D\u016fkladn\u00e9 pokryt\u00ed testov\u00e1n\u00edm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>P\u0159i n\u00e1vrhu pro testovatelnost (DFT) je nezbytn\u00e9 vz\u00edt v \u00favahu objem v\u00fdroby a po\u017eadavky. Dodr\u017eov\u00e1n\u00edm pokyn\u016f DFT mohou smluvn\u00ed v\u00fdrobci (CM) zajistit efektivn\u00ed testov\u00e1n\u00ed a sn\u00ed\u017eit v\u00fdrobn\u00ed n\u00e1klady. Testovac\u00ed body mus\u00ed b\u00fdt pe\u010dliv\u011b napl\u00e1nov\u00e1ny, aby vyhovovaly zvolen\u00e9 testovac\u00ed metod\u011b a zajistily bezprobl\u00e9movou integraci a efektivn\u00ed testovac\u00ed procesy.<\/p>\n<h2>DFM a DFT Best Practices<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/design_for_manufacturability_and_design_for_testability.jpg\" alt=\"design pro vyrobitelnost a design pro testovatelnost\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>Smluvn\u00ed v\u00fdrobci hraj\u00ed d\u016fle\u017eitou roli p\u0159i zaji\u0161\u0165ov\u00e1n\u00ed testovatelnosti poskytov\u00e1n\u00edm <strong>Pokyny pro DFM a DFT<\/strong>. Tyto pokyny, jsou-li dodr\u017eov\u00e1ny, usnad\u0148uj\u00ed <strong>efektivn\u00ed testovac\u00ed procesy<\/strong> a sn\u00ed\u017eit v\u00fdrobn\u00ed n\u00e1klady. Jsou nezbytn\u00e9 pro nejlep\u0161\u00ed n\u00e1vrh a testov\u00e1n\u00ed desek plo\u0161n\u00fdch spoj\u016f (PCB).<\/p>\n<p>P\u0159ezkoum\u00e1n\u00edm pokyn\u016f smluvn\u00edho v\u00fdrobce mohou v\u00fdrobci posoudit svou odbornost a schopnost zaru\u010dit testovatelnost. Pokyny pro DFT jsou nezbytn\u00e9 pro <strong>po\u010d\u00e1te\u010dn\u00ed pl\u00e1nov\u00e1n\u00ed uspo\u0159\u00e1d\u00e1n\u00ed<\/strong> pro usnadn\u011bn\u00ed efektivn\u00edch testovac\u00edch proces\u016f. Je d\u016fle\u017eit\u00e9 diskutovat konkr\u00e9tn\u011b <strong>po\u017eadavky na zku\u0161ebn\u00ed bod<\/strong> s erudovan\u00fdmi testovac\u00edmi techniky pro d\u016fkladn\u00e9 pokryt\u00ed test\u016f.<\/p>\n<p>Prov\u00e1d\u011bn\u00ed <strong>Nejlep\u0161\u00ed postupy DFT<\/strong> pom\u00e1h\u00e1 p\u0159i v\u00fdb\u011bru nejlep\u0161\u00edho smluvn\u00edho v\u00fdrobce pro \u00fasp\u011b\u0161nou v\u00fdrobu produkt\u016f. Dob\u0159e navr\u017een\u00fd obvod s dostate\u010dn\u00fdm po\u010dtem testovac\u00edch podlo\u017eek a snadno p\u0159\u00edstupn\u00fdmi p\u00e1jen\u00fdmi spoji umo\u017e\u0148uje efektivn\u00ed testov\u00e1n\u00ed a sni\u017euje pot\u0159ebu n\u00e1kladn\u00e9 p\u0159epracov\u00e1n\u00ed. <strong>Vizu\u00e1ln\u00ed kontrola<\/strong> je tak\u00e9 usnadn\u011bno, co\u017e zaji\u0161\u0165uje, \u017ee z\u00e1vady jsou identifikov\u00e1ny v ran\u00e9 f\u00e1zi <strong>produk\u010dn\u00ed proces<\/strong>.<\/p>\n<h2>Design PCB pro testovatelnost<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/optimizing_pcb_test_processes.jpg\" alt=\"optimalizace testovac\u00edch proces\u016f PCB\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>Strategickou integrac\u00ed <strong>testovac\u00ed body<\/strong> do layoutu, PCB Design for Testability (DFT) umo\u017e\u0148uje efektivn\u00ed <strong>detekce a izolace chyb<\/strong> b\u011bhem testov\u00e1n\u00ed, \u010d\u00edm\u017e se sn\u00ed\u017e\u00ed <strong>v\u00fdrobn\u00ed chyby a n\u00e1klady<\/strong>. Tento p\u0159\u00edstup zaru\u010duje, \u017ee testovac\u00ed sondy mohou p\u0159istupovat ke kritick\u00fdm uzl\u016fm a sign\u00e1l\u016fm, co\u017e usnad\u0148uje p\u0159esnou detekci a diagnostiku chyb.<\/p>\n<p>Spr\u00e1vn\u00e9 um\u00edst\u011bn\u00ed testovac\u00edch bod\u016f je z\u00e1sadn\u00ed, proto\u017ee p\u0159\u00edmo ovliv\u0148uje <strong>testovac\u00ed pokryt\u00ed a integrita sign\u00e1lu<\/strong>. Dob\u0159e navr\u017een\u00e9 testovac\u00ed body umo\u017e\u0148uj\u00ed efektivn\u00ed testov\u00e1n\u00ed, sni\u017euj\u00ed pravd\u011bpodobnost v\u00fdrobn\u00edch chyb a souvisej\u00edc\u00edch n\u00e1klad\u016f.<\/p>\n<p>P\u0159i n\u00e1vrhu PCB principy DFT vedou um\u00edst\u011bn\u00ed testovac\u00edch bod\u016f pro optimalizaci testovac\u00edho pokryt\u00ed a zaji\u0161\u0165uj\u00ed, \u017ee v\u0161echny kritick\u00e9 komponenty a sign\u00e1ly jsou p\u0159\u00edstupn\u00e9 pro testov\u00e1n\u00ed. Tento holistick\u00fd p\u0159\u00edstup k testovatelnosti umo\u017e\u0148uje detekci chyb v ran\u00e9 f\u00e1zi v\u00fdrobn\u00edho procesu, \u010d\u00edm\u017e se sni\u017euje pravd\u011bpodobnost vzniku vad a souvisej\u00edc\u00ed n\u00e1klady.<\/p>\n<h2>Z\u00e1kladn\u00ed pravidla a \u00favahy DFT<\/h2>\n<div class=\"body-image-wrapper\" style=\"margin-bottom:20px;\"><img decoding=\"async\" width=\"1006\" height=\"575\" src=\"https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/dft_guidelines_and_principles.jpg\" alt=\"pokyny a z\u00e1sady dft\" style=\"aspect-ratio: 16\/9;\"><\/div>\n<p>Aby bylo zaru\u010deno \u00fa\u010dinn\u00e9 testov\u00e1n\u00ed a detekce chyb, mus\u00ed n\u00e1vrh\u00e1\u0159i dodr\u017eovat soubor z\u00e1kladn\u00edch <strong>Pravidla DFT<\/strong> a \u00favahy, kter\u00e9 \u0159\u00edd\u00ed um\u00edst\u011bn\u00ed a design <strong>testovac\u00ed body<\/strong>. P\u0159i navrhov\u00e1n\u00ed testovatelnosti je nezbytn\u00e9 zajistit, aby testovac\u00ed body m\u011bly minimum <strong>Sv\u011btlost 50 mil<\/strong> ke komponent\u00e1m a stop\u00e1m pro spr\u00e1vn\u00fd p\u0159\u00edstup.<\/p>\n<p>Krom\u011b toho by zku\u0161ebn\u00ed body m\u011bly m\u00edt a <strong>Sv\u011btlost 100 mil<\/strong> k okraji desky pro snadn\u00e9 testov\u00e1n\u00ed. Koordinace se smluvn\u00edm v\u00fdrobcem (CM) umo\u017e\u0148uje simult\u00e1nn\u00ed <strong>testov\u00e1n\u00ed ICT<\/strong> na obou stran\u00e1ch desky plo\u0161n\u00fdch spoj\u016f, co\u017e umo\u017e\u0148uje d\u016fkladn\u00e9 testov\u00e1n\u00ed b\u011bhem v\u00fdroby.<\/p>\n<p>Pro d\u016fkladn\u00e9 testov\u00e1n\u00ed jsou \u017eivotn\u011b d\u016fle\u017eit\u00e9 testovac\u00ed body specifick\u00e9 pro konkr\u00e9tn\u00ed s\u00ed\u0165, kter\u00e9 umo\u017e\u0148uj\u00ed detekci otev\u0159en\u00fdch obvod\u016f a z\u00e1vad v elektrick\u00fdch spoj\u00edch. Snadno dostupn\u00e9 <strong>body sondy<\/strong> pro pomocn\u00e9 techniky ru\u010dn\u00edho testov\u00e1n\u00ed p\u0159i efektivn\u00ed izolaci chyb, sn\u00ed\u017een\u00ed prostoj\u016f a zv\u00fd\u0161en\u00ed celkov\u00e9 efektivity v\u00fdroby.<\/p>\n<h2>\u010casto kladen\u00e9 ot\u00e1zky<\/h2>\n<h3>Jak\u00e9 jsou principy n\u00e1vrhu pro testovatelnost?<\/h3>\n<p>Principy Design for Testability (DFT) se to\u010d\u00ed kolem za\u010dlen\u011bn\u00ed <strong>testovac\u00ed body<\/strong>, p\u0159\u00edstup a viditelnost pro usnadn\u011bn\u00ed efektivn\u00edho testov\u00e1n\u00ed.<\/p>\n<p>Mezi kl\u00ed\u010dov\u00e9 principy pat\u0159\u00ed poskytov\u00e1n\u00ed jasn\u00fdch sign\u00e1lov\u00fdch cest, <strong>\u0159\u00edzen\u00e1 impedance<\/strong>a odpov\u00eddaj\u00edc\u00edm nap\u00e1jen\u00edm a uzemn\u011bn\u00edm.<\/p>\n<p>Krom\u011b toho by m\u011bly b\u00fdt zku\u0161ebn\u00ed body udr\u017eov\u00e1ny mimo dosah sou\u010d\u00e1st\u00ed s dostate\u010dn\u00fdm rozestupem pro zku\u0161ebn\u00ed sondy a <strong>integrita sign\u00e1lu<\/strong> zaru\u010dena.<\/p>\n<h3>Co jsou sm\u011brnice DFT?<\/h3>\n<p>Pokyny DFT jsou souborem pravidel a doporu\u010den\u00ed, kter\u00e9 usnad\u0148uj\u00ed n\u00e1vrh desek s plo\u0161n\u00fdmi spoji (PCB) s ohledem na testovatelnost. Tyto pokyny nasti\u0148uj\u00ed specifick\u00e9 po\u017eadavky na testovac\u00ed body, \u00favahy o sledov\u00e1n\u00ed a testovac\u00ed metodologie, aby byla zaru\u010dena \u00fa\u010dinnost <strong>izolace poruch<\/strong> a rychl\u00e9 testov\u00e1n\u00ed.<\/p>\n<h3>Jak\u00e9 jsou pokyny pro PCB p\u0159i testov\u00e1n\u00ed?<\/h3>\n<p>V ned\u00e1vn\u00e9m projektu, kter\u00fd realizoval p\u0159edn\u00ed v\u00fdrobce elektroniky <strong>sm\u011brnice PCB<\/strong> zaru\u010dit efektivn\u00ed testov\u00e1n\u00ed jejich nov\u00e9 produktov\u00e9 \u0159ady.<\/p>\n<p>Nap\u0159\u00edklad za\u010dlenili <strong>testovac\u00ed body<\/strong> s minim\u00e1ln\u00ed v\u016fl\u00ed 0,5 mm pro usnadn\u011bn\u00ed <strong>testov\u00e1n\u00ed l\u00e9taj\u00edc\u00ed sondy<\/strong>. T\u00edm dos\u00e1hli zkr\u00e1cen\u00ed doby testov\u00e1n\u00ed o 30% a zv\u00fd\u0161en\u00ed o 25% <strong>p\u0159esnost detekce z\u00e1vad<\/strong>.<\/p>\n<p>Pokyny pro PCB se p\u0159i testov\u00e1n\u00ed zam\u011b\u0159uj\u00ed na za\u010dlen\u011bn\u00ed testovac\u00edch bod\u016f, tras, LED a specifick\u00fdch funkc\u00ed obvod\u016f pro zaji\u0161t\u011bn\u00ed p\u0159esnosti provozn\u00edho a funk\u010dn\u00edho testov\u00e1n\u00ed a identifikaci chyb.<\/p>\n<h3>Jak\u00e9 jsou p\u0159\u00edstupy v n\u00e1vrhu pro testovatelnost?<\/h3>\n<p>V dom\u00e9n\u011b <strong>design pro testovatelnost<\/strong>, n\u011bkolik p\u0159\u00edstup\u016f usnad\u0148uje \u00fa\u010dinn\u00e9 testov\u00e1n\u00ed a detekci chyb. Mezi kl\u00ed\u010dov\u00e9 strategie pat\u0159\u00ed vytv\u00e1\u0159en\u00ed testovac\u00edch bod\u016f pro snadn\u00fd p\u0159\u00edstup, implementace <strong>testov\u00e1n\u00ed boundary scan<\/strong>a pomoc\u00ed <strong>za\u0159\u00edzen\u00ed JTAG<\/strong> zlep\u0161it schopnosti detekce poruch.<\/p>\n<p>Nav\u00edc za\u010dlen\u011bn\u00ed <strong>vestav\u011bn\u00e9 funkce autotestu<\/strong> a navrhov\u00e1n\u00ed pro snadn\u00e9 lad\u011bn\u00ed a izolaci chyb jsou z\u00e1sadn\u00ed pro dosa\u017een\u00ed c\u00edl\u016f testovatelnosti. Tyto p\u0159\u00edstupy umo\u017e\u0148uj\u00ed efektivn\u00ed testov\u00e1n\u00ed, zkracuj\u00ed dobu uveden\u00ed na trh a zlep\u0161uj\u00ed celkovou spolehlivost produktu.<\/p>","protected":false},"excerpt":{"rendered":"<p>Sledov\u00e1n\u00edm optim\u00e1ln\u00edho n\u00e1vrhu desky s plo\u0161n\u00fdmi spoji odhalte z\u00e1kladn\u00ed pokyny a pravidla, kter\u00e1 zajist\u00ed bezprobl\u00e9movou detekci a izolaci chyb.<\/p>","protected":false},"author":9,"featured_media":2279,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[30],"tags":[],"class_list":["post-2280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-electronic-testability-solutions"],"uagb_featured_image_src":{"full":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs.jpg",1006,575,false],"thumbnail":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs-150x150.jpg",150,150,true],"medium":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs-300x171.jpg",300,171,true],"medium_large":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs-768x439.jpg",768,439,true],"large":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs.jpg",1006,575,false],"1536x1536":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs.jpg",1006,575,false],"2048x2048":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs.jpg",1006,575,false],"trp-custom-language-flag":["https:\/\/tryvary.com\/wp-content\/uploads\/2024\/05\/testability_guidelines_for_designs.jpg",18,10,false]},"uagb_author_info":{"display_name":"Ben Lau","author_link":"https:\/\/tryvary.com\/cs\/author\/wsbpmbzuog4q\/"},"uagb_comment_info":0,"uagb_excerpt":"Pursuing optimal printed circuit board design&#44; uncover the essential guidelines and rules that ensure seamless fault detection and isolation.","_links":{"self":[{"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/posts\/2280","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/comments?post=2280"}],"version-history":[{"count":1,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/posts\/2280\/revisions"}],"predecessor-version":[{"id":2509,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/posts\/2280\/revisions\/2509"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/media\/2279"}],"wp:attachment":[{"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/media?parent=2280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/categories?post=2280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tryvary.com\/cs\/wp-json\/wp\/v2\/tags?post=2280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}