Ho ntlafatsa Tlhahiso ea PCB le Kopano ka Boundary Scan Technology

Kenyelletso ea Boundary-Scan Technology

Boundary-scan, e hlalosoang ke IEEE 1149.1 e tloaelehileng, ke mokhoa o kopantsoeng oa ho hlahloba li-interconnect ho liboto tsa potoloho tse hatisitsoeng (PCBs) boemong bo kopanetsoeng ba potoloho (IC). E boetse e tsejoa e le JTAG (Joint Test Action Group), boundary-scan e qalile ka bo-1980 ho rarolla mefokolo ea mekhoa ea khale ea tlhahlobo. Ho tloha ha e behiloe ka 1990, e fetohile sesebelisoa sa bohlokoa ho etsa le ho kopanya PCB ea sejoale-joale. Theknoloji ea "boundary-scan" e ntse e ata ka lebaka la theko e tlase, bokhoni bo phahameng ba ho lekola li-PCB tse thata, haholo tse nang le likarolo tse teteaneng joalo ka li-BGA (Ball Grid Arrays), tseo ho leng thata ho li fumana ho sebelisoa mekhoa e tloaelehileng ea tlhahlobo.

Ho Highleap Electronic, re kopanya theknoloji ea ho hlahloba meeli lits'ebetsong tsa rona tsa tlhahiso le kopano ea PCB , re nolofalletsa liteko tse felletseng le tse sebetsang hantle bakeng sa lihlahisoa tse sebetsang hantle ha re ntse re fokotsa litšenyehelo le ho rarahana ha mekhoa ea liteko tsa setso.

Mathata a Tekong ea Setso ea PCB

Ha lisebelisoa tsa elektroniki li ntse li fokola haholo 'me li tlala haholo, mekhoa ea setso joalo ka mefokolo ea sefahleho ea in-circuit (ICT), haholo-holo ka likarolo tse hlakileng, li-BGA, le li-PCB tse ngata. Ho lekola meralo ena ka lisebelisoa tse tloaelehileng tsa tlhahlobo ea potoloho le lisebelisoa tsa lipekere ho fetoha ho bitsa chelete e ngata haholo, 'me maemong a mangata, ha ho khonehe. Mona ke moo boundary-scan e fanang ka molemo o moholo, kaha ha e hloke phihlello ea tlhahlobo ea 'mele ho pini e ngoe le e ngoe e ho PCB.

Ho hlahisoa ha boundary scanning ho ile ha lumella tharollo e sebetsang haholoanyane, ho fokotsa tlhoko ea lisebelisoa tse rarahaneng tsa liteko ha ho ntse ho eketsa ts'ebetso ea tlhahlobo. Bokhoni ba Boundary-scan ba ho leka likhokahano lipakeng tsa li-IC ntle le ho hloka phihlello e tobileng ho phini ka 'ngoe bo ntlafalitse haholo ts'ebetso ea tlhahlobo le ts'epahalo ea li-PCB tsa sejoale-joale.

Kamoo Boundary-Scan e Sebetsang Kateng

Theknoloji ea "boundary-scan" e sebetsa ka ho kenya lisele tsa moeli-scan ka pineng e 'ngoe le e 'ngoe ea sesebelisoa ho PCB. Lisele tsena li ka nka data ho tsoa pineng kapa tsa qobella data ho eona. Lintlha tse hapuoeng li fetisoa ka phini ea tlhahlobo ea tlhahlobo ea data (TDO) mme ha e bapisoa le liphetho tse lebelletsoeng. Haeba ho na le ho se lumellane ho teng, ho ka sebelisoa ho hlahloba liphoso tse kang li-shorts, li-opens, kapa likarolo tse sieo.

Boundary-scan e felisa tlhoko ea li-vector tsa liteko tsa setso ka ho lumella phihlello e tobileng ea matlooa ho PCB. Seo ka tloaelo se neng se hloka likete tsa li-vector tsa liteko ho leka logic ea tatellano joale se ka finyelloa ka makholo a 'maloa feela, ho ntlafatsa katleho le ho fokotsa litšenyehelo tsa tlhahlobo. Ho feta moo, e fokotsa haholo nako e hlokahalang bakeng sa tlhahlobo mme e fana ka bokhoni bo boholo ba tlhahlobo ea liphoso ha e bapisoa le mekhoa ea khale ea tlhahlobo.

Moeli-Scan bakeng sa Tlhahiso ea PCB le Kopano

Ho Highleap Electronic, re sebelisa liteko tsa ho lekola moeli likarolong tse peli tsa tlhahiso ea PCB le ea kopano. Nakong ea tlhahiso, ho hlahloba moeli ho re lumella ho lekola likhokahano lipakeng tsa li-IC ka boto ntle le ho hloka lipatlisiso tsa 'mele. Sena se felisa tlhoko ea lisebelisoa tse pharalletseng tsa liteko le ho fokotsa litšenyehelo tse akaretsang tsa tlhahlobo, haholo-holo meralong e phahameng haholo.

Hang ha kopano ea PCB e phethiloe, ho hlahloba moeli ho tsoela pele ho phetha karolo ea bohlokoa ho netefatsa hore karolo ka 'ngoe e hokahane hantle ebile e sebetsa. Bokhoni ba ho lekola li-IC tse rarahaneng, ho kenyeletsoa le tse nang le liphutheloana tsa BGA, ntle le ho ba le phihlello e tobileng ea pini e 'ngoe le e' ngoe e karolong e re thusa ho tseba mefokolo e ka bang teng qalong ea kopano, ho netefatsa ts'epo e phahameng le ho fokotsa kotsi ea ts'ebetso e theko e boima kapa ho lokisoa hamorao tlhahiso. .

Melemo ea Boundary-Scan Technology

1. Keketseho ea Tlhahlobo ea Tlhahlobo: Boundary-scan e fana ka tšireletso e felletseng ea liteko bakeng sa likhokahano lipakeng tsa li-IC, e leng tsa bohlokoa bakeng sa liboto tse phahameng tse nang le meralo e rarahaneng. E boetse e ntlafatsa ho lemoha liphoso tseo ho leng thata ho li lemoha ka mekhoa ea khale ea ICT.
2. Litšenyehelo-litšenyehelo: Ho fapana le ICT ea setso, e hlokang nts'etsopele ea lisebelisoa tse theko e boima bakeng sa moralo o mong le o mong, ho lekola moeli ho felisa tlhoko ea lisebelisoa tse rarahaneng, ho fokotsa litšenyehelo tsa ho seta le nako ea tlhahlobo.
3. Nako e Potlakileng ea ho ea Marakeng: Ka ho lekola moeli, re ka qala ho etsa liteko pejana ts'ebetsong ea moralo le ho iketsetsa boholo ba tlhahiso ea liteko, ho potlakisa potoloho ea ntlafatso ka kakaretso. Sena se re lumella ho fana ka lihlahisoa ka potlako le ho fihlela litlhoko tse thata tsa 'maraka.
4. Tlhahlobo e Ntlafetseng: Boundary-scan e fana ka tlhahlobo e qaqileng ea liphoso, e nolofalletsang ho tseba sebaka se nepahetseng le sebopeho sa mefokolo. Sena se ka lebisa ho litokiso tse potlakileng le lihlahisoa tsa ho qetela tse tšepahalang.
5. Ha ho na Phihlello ea Teko ea 'Mele e Hlokehang: Bokhoni ba ho lekola likhokahano le menahano ntle le ho hloka lipatlisiso tsa 'mele li etsa hore ho lekola moeli e be sesebelisoa sa bohlokoa bakeng sa ho lekola likarolo tsa molumo o hlakileng, li-BGA, le liboto tse nang le mekhahlelo e mengata tseo ho seng bonolo ho li fihlela.

Ho Kopanya Boundary-Scan le Teko ea Ka hare ho Potoloho (ICT)

Le hoja moeli oa ho hlahloba moeli o fana ka tlhahlobo e feletseng ea ho hokahanya, hangata e sebelisoa hammoho le ICT ho netefatsa hore ho na le liteko tse feletseng tsa liteko tsa motlakase le tsa ts'ebetso. ICT e leka likarolo tsa motho ka mong ho PCB, e netefatsa ts'ebetso ea tsona le ho netefatsa hore li behiloe ka nepo le ho rekisoa. Ka ho kopanya ICT le boundary-scan, Highleap Electronic e fihlella ts'ebetso ea tlhahlobo e phethahetseng e eketsang ho lemoha liphoso le ho fokotsa nako ea liteko.

Ho kenyelletsa ho hlahloba moeli ho litsamaiso tsa ICT ho boetse ho lumella tlhahlobo ea nako e le 'ngoe ea likhokahano le likarolo, ho felisa tlhoko ea mekhoa e mengata e fapaneng ea liteko. Mokhoa ona o kopantsoeng o ntlafatsa katleho le ho fokotsa litšenyehelo tsa tlhahiso ka kakaretso.

Moeli-Scan bakeng sa Ntlafatso ea Sehlahisoa

Boundary-scan ha e felle feela tekong ea tlhahiso. Hape ke sesebelisoa sa bohlokoahali nakong ea mokhahlelo oa sehlahisoa. Ha ba rala PCB e ncha, baenjiniere ba Highleap Electronic ba sebelisa theknoloji ea boundary-scan ho netefatsa hore testability e "etselitsoe" ho tloha qalong. Ka ho sebelisa moeli-scan nakong ea mekhahlelo ea pele ea nts'etsopele, liphoso tse ka bang teng tsa moralo li ka tsejoa le ho rarolloa pele PCB e phetheloa. Sena se fella ka lintlafatso tse fokolang, prototyping e potlakileng, le mokhoa o hlophisitsoeng oa tlhahiso.

Ho feta moo, ho hlahloba moeli ho re thusa ho lekola litšoantšiso kapele le ka nepo, leha liteko tsa khale li le sieo. Sena se bohlokoa ka ho khetheha liindastering tse potlakileng moo nako ea ho ea 'marakeng e leng bohlokoa.

Meeli-Scan Lits'ebetso tse Ntle ho Tlhahiso

Ka ntle ho ts'ebeliso ea eona litekong tsa tlhahiso, boundary-scan e boetse e bohlokoa bakeng sa mekhahlelo e meng ea bophelo ba sehlahisoa, ho kenyeletsoa ts'ebeletso le ts'ebetso ea masimong. Ka ho hlahloba moeli, lisebelisoa tsa nako le nako le lisebelisoa tsa hardware li ka etsoa ka thōko, ho lumella hore ho be le reprogramming ea tšimong ea lisebelisoa tsa "programmable logic" (PLDs) le memori ea flash. Bokhoni bona bo fokotsa tlhokeho ea lisebelisoa tse khethehileng tsa ts'ebeletso 'me bo nolofalletsa lihlopha tsa tlhokomelo ho etsa liteko tsa tlhahlobo le litokiso ka katleho.

Ho feta moo, bokhoni ba ho fihlella ketane ea ho hlahloba moeli ho tloha ho PC e bonolo ho etsa bonnete ba hore li-vectors tse tšoanang tsa teko tse sebelisoang karolong ea tlhahiso li ka sebelisoa hape bakeng sa merero ea ho hlahloba, ho fokotsa litšenyehelo le nako e hlokahalang bakeng sa tokiso ea masimo.

fihlela qeto e

Ho Highleap Electronic, re etelletsa pele ho tlisa kopano le lits'ebeletso tsa tlhahiso ea PCB ea boleng bo holimo, e tšepahalang, le e baballang chelete e ngata. Ka tekhenoloji ea ho lekola meeli e kenyellelitsoeng tšebetsong ea rona ea liteko, re fana ka tharollo e felletseng e ntlafatsang ts'ebetso ea liteko, e fokotsang litšenyehelo tsa tlhahlobo, le ho potlakisa nako ea ho rekisa lihlahisoa tsa hau.

Ha meralo ea PCB e ntse e rarahana le ho feta, ho hlahloba moeli ho bapala karolo ea bohlokoa ho netefatseng liteko tse sebetsang hantle le tse felletseng. E re lumella ho lemoha le ho rarolla mathata a ka bang teng esale pele, nakong ea tlhahiso le nakong eohle ea bophelo ba sehlahisoa, ho netefatsa maemo a boleng bo holimo bakeng sa PCB e 'ngoe le e 'ngoe eo re e etsang.

Ka ho khetha Highleap Electronic, u sebelisana 'moho le k'hamphani e sebelisang mahlale a tsoetseng pele joalo ka ho lekola moeli ho fihlela tlhoko e ntseng e eketseha ea lihlahisoa tsa elektroniki tse sebetsang hantle haholo le tse tšepahalang. Re ikemiseditse ho o thusa ho nolofatsa tshebetso ya tlhahiso, ho fokotsa ditjeho, le ho tlisa dihlahiswa tsa boleng bo hodimo mmarakeng ka potlako. E re re u thuse ho lula u le pele indastering ea tlholisano ea lisebelisoa tsa elektroniki ka litharollo tsa liteko tseo u li hlokang hore u atlehe.