Idizayini ye-PCB yeBhodi Yokulawula Amarobhothi ye-Compute, I/O kanye ne-DFM

Ibhodi lokulawula irobhothi liphezulu kwesigaba se-elekthronikhi — i-compute eqhuba isofthiwe yohlelo lokusebenza, ixhumanisa ama-motor drive, ifunda isimo senzwa, futhi ixhumana nomhlaba wangaphandle. Irobhothi lisebenza noma lihluleka ngokusekelwe ekutheni umklamo webhodi lokulawula uthola isikhathi, amandla okubala, izixhumi zokuxhumana, kanye nobunjiniyela bokuthembeka. Leli khasi lihlanganisa umklamo we-PCB webhodi lokulawula irobhothi kanye nokukhiqiza ngqo: ukuthi izinketho ze-SoC kanye ne-MCU zibukeka kanjani kumapulatifomu anamuhla, okuhlanganisa ibhodi okumele libambe, nokuthi yiziphi izinto zokukhiqiza ezisebenza lapho kukhiqizwa ibhodi ngokwethembeka.

Amabhodi okulawula amarobhothi esimanje ahlanganisa i-MCU noma i-SoC compute nesethi yesixhumi esibonakalayo esicebile, amabhasi asheshayo alawulwayo angenawo umoya, isitoreji esingashintshi, kanye nokuphathwa kwamandla okusebhodini. Umklamo uhlanganisa imikhakha eminingana - ikhompyutha ehlanganisiwe, ukulawula ukunyakaza, ukuxhumana, isitoreji, amandla - ngayinye enomkhuba wayo. Izinhlelo lapho ibhodi lokulawula laklanywa khona ngakho konke lokhu engqondweni lithumela imikhiqizo ethembekile; izinhlelo eziphatha ibhodi lokulawula njengeplatifomu ehlanganisiwe ejwayelekile zivame ukuthola izikhala ezithile zamarobhothi ekuhlanganisweni noma ekusetshenzisweni kwensimu.

Lokho Okwenziwa Yibhodi Lokulawula Amarobhothi Empeleni Kuhlelo Lwerobhothi

Ibhodi lokulawula lichaza uphahla lwesofthiwe yerobhothi

Ukubala, inkumbulo, isitoreji, inani lesixhumi esibonakalayo, izihloko zokunweba, kanye ne-headroom yokushisa kunquma ukuthi ithimba lesofthiwe lingakunikeza ini ngomjikelezo wokuphila werobhothi. Ibhodi lokulawula elilungiselelwe izidingo zokukhishwa kokuqala kuphela livame ukuba yisithiyo lapho izici zokuqonda, zokubhalisa, zokuxilonga, zokuxhuma, noma zokuphepha zanda.

Amabhodi okulawula amarobhothi asebenzisa isofthiwe yesicelo sezinga eliphezulu lerobhothi, axhumanisa izinhlelo ezingaphansi kwezingxenye, futhi axhumana nezinhlelo zangaphandle. Ahlala phezulu kwesigaba sokulawula — ethumela imiyalo kuma-motor drive, isimo senzwa yokufunda, ukuqonda nokusebenza nokuhlela, futhi exhumana nomhlaba wangaphandle. Okwenza ibhodi lokulawula irobhothi lihluke kwezinye izilawuli ezifakiwe yinhlanganisela yezidingo okumele izisingathe ngesikhathi esisodwa:

• Ukuxhumana kwesikhathi sangempela: ibhodi lokulawula likhipha imiyalo kuma-motor drive futhi lifunda isimo senzwa ngamanani e-loop anquma ikhwalithi yokunyakaza kwerobhothi. Izinga le-loop liyi-100 Hz kuya ku-1 kHz elijwayelekile lokuxhumanisa ukunyakaza; amazinga aphezulu kuzinhlelo zokusebenza ezidinga amandla.
• Ukubala kwezinga lohlelo lokusebenza: ukuhlela, ukuqonda, ukwenza izinqumo, kanye nokusetshenziswa komsebenzisi kusebenza ebhodini elifanayo noma ebhodini lokubala elisendaweni eyodwa. Umthwalo wokubala usukela emisebenzini emincane ye-MCU kumarobhothi alula kuya emisebenzini egcwele ye-Linux-class SoC kumapulatifomu ayinkimbinkimbi.
• Isikhungo sokuxhumana: ibhodi lokulawula livame ukubamba izixhumi ezixhunywe ngocingo nezingenantambo ezinhlelweni zangaphandle. I-Ethernet, i-USB, i-Wi-Fi, i-CAN, kanye nezixhumi ezivame ukuba ezikhethekile zamaphrothokholi athile erobhothi.
• Isitoreji esingaguquguquki: isofthiwe yohlelo lokusebenza, idatha yokulinganisa, ukucushwa, kanye namalogi agcinwe ku-eMMC, SD, noma i-SSD kuye ngokuthi amandla kanye nezidingo zokuthembeka ziyadingeka.
• Ukuphathwa kwamandla: ukulawulwa kwamandla kagesi angaphakathi kwebhodi yezindlela ezahlukene zokuqondisa ezidingwa yi-SoC kanye nezingxenye ezingaphandle. Ngezinye izikhathi ibhodi yokulawula iphinde iphathe ukuhlanganiswa kokuvuka/ukulala kwezinhlelo ezingaphansi kwamandla aphansi.

Ibhodi lokulawula yilapho ikhono elingabonakali lerobhothi lihlangana khona nokusebenza kwalo ngokomzimba. Isofthiwe yohlelo lokusebenza isebenza lapho; isimo senzwa sihlanganiswa lapho; imiyalo yokunyakaza ivela lapho. Lokho ibhodi lokulawula elingakusekela ngesikhathi sokuklama kunquma lokho irobhothi elingakwenza kuyo yonke impilo yalo yesevisi - ibhodi lokulawula elingenalo i-headroom eyanele ekubaleni, kwimemori, noma ezixhumi ezixhumi kuvimbela ithimba lesofthiwe kulo lonke umjikelezo wokuphila komkhiqizo. Izinhlelo ezichaza ibhodi lokulawula eline-headroom enkulu zivame ukuvumela ukwanda kwamandla; izinhlelo ezichaza ngokuqinile zivame ukuvuselela umjikelezo wokuphila webhodi ukuze zengeze amandla ibhodi lokuqala elalingawalindele.

Ukuthola ibhodi yokulawula efanele kubalulekile ekusebenzeni kahle kwerobhothi. Ibhodi yokulawula ephuthelwa yisikhathi sokugcina ikhiqiza ukunyakaza okuguquguqukayo; ibhodi yokulawula elenga ngezikhathi ezithile ikhiqiza ukuziphatha okungathembekile okungekho ukulungiswa okungenziwa yinoma yiliphi izinga.

Ukukhetha i-SoC, i-MCU, kanye ne-Compute kwamaBhodi Okulawula Amarobhothi

Khetha ukwakheka kokubala okuzungeze ukubambezeleka, i-software stack, kanye nokuphila okuhlinzekwayo

I-MCU, i-SoC, i-AI accelerator, i-FPGA, kanye nezinketho ze-x86 ezifakiwe kufanele zihlolwe ngokwesikhathi esinqunyiwe, ukwesekwa kwesistimu yokusebenza, i-software ecosystem, isabelomali samandla, i-thermal envelope, ukutholakala kwephakheji, kanye nengozi yomjikelezo wokuphila. Iprosesa eshibhile kakhulu ayibizi kakhulu uma iphoqa ibhodi ukuthi liphendule noma liyekethise isofthiwe.

Ukukhethwa kwe-SoC noma i-MCU kuyisinqumo esisodwa esikhulu kunazo zonke ebhodini lokulawula irobhothi. Ukukhetha kunquma ikhono lokubala, ukutholakala kwezingxenye ezingaphandle, ukusetshenziswa kwamandla, izindleko, kanye nokunikezwa kwesikhathi eside. Izigaba eziyinhloko ezisetshenziswa kumarobhothi yilezi:

• I-Cortex-M4/M7 MCU: kwanele ukuxhumanisa ukunyakaza okumsulwa kanye nezinhlelo zokusebenza ezilula. Amandla aphansi, isikhathi esinqunyiwe, akukho ukusebenza kwesistimu yokusebenza. Okuvamile kumarobhothi ezinsizakalo zezimboni kanye nezinsizakalo ezilula lapho isidingo sokubala sincane khona.
• I-SoC yesigaba se-Cortex-A: isebenzisa i-Linux noma i-RTOS. Yanele izinhlelo zokusebenza eziyinkimbinkimbi ephakathi nendawo ezinombono ophansi. Izinga le-Ethernet, i-USB, izixhumi zekhamera. Zivamile kumapulatifomu okulawula ezimboni.
• I-SoC yesivinini se-AI: ihlanganisa i-CPU kanye ne-NPU noma i-GPU. Iphatha ukuqonda, ukuhlanganiswa kwenzwa, kanye nokubala kwezinga lesicelo. Ivamile kumarobhothi esevisi yomuntu, azimele, kanye ne-premium. Izindleko eziphakeme kanye nomthwalo wokushisa.
• i-x86 efakiwe: Ihadiwe yezinga le-PC yezimboni. Ukusekelwa kwesofthiwe yokubala okuphezulu kakhulu, okubanzi kakhulu, kodwa izindleko eziphezulu kanye nomkhawulo omkhulu webhodi. Isetshenziswa lapho izitaki zesofthiwe ezikhona zidinga i-x86 noma lapho isabelomali sokushisa sivumela khona.
• I-FPGA + i-MCU: inhlanganisela ekhethekile yokucubungula isignali ngesikhathi sangempela kanye nokulawula okuvamile. Kusetshenziswa lapho isikhathi esinqunyiwe ngamanani aphezulu sibaluleke kakhulu kunokuguquguquka kwesofthiwe.

Ukunikezwa kwesikhathi eside kuyinto ebalulekile ekukhetheni ikhompyutha okungavamile ukubalwa yi-electronics yabathengi. Irobhothi elinempilo yesevisi yeminyaka eyi-10 lidinga i-SoC noma i-MCU ukuthi ihlale itholakala ngaleso sikhathi, noma okungenani isu lokugcina lokuthenga impahla. Imindeni ye-SoC enezibopho zokusekela zesikhathi eside ezichaziwe (izingxenye zezinga lezimboni ezivela kubathengisi abakhulu abanezibopho zokutholakala zeminyaka eyi-10-15) igcina ukusebenziseka; izingxenye zezinga labathengi ezinemijikelezo yempilo emifushane zidala izinkinga zokugcinwa kamuva. Izinhlelo ezihlola ukwesekwa kwesikhathi eside ekukhetheni i-SoC zigwema ukuhlelwa kabusha komjikelezo wempilo ophakathi okucindezela izingxenye zokunikezwa okufushane.

Ukukhetha kuncike kuhlelo lokusebenza. Ukucacisa ngokweqile i-SoC kukhokhela izindleko ezengeziwe kanye nomthwalo wokushisa ngamandla uhlelo lokusebenza olungawasebenzisi; ukucacisa okungaphansi kushiya ithimba lesofthiwe lilwa nemikhawulo yesikhathi kanye nomthamo. Umhlahlandlela wokuhlaziya izindleko ze-PCB yerobhothi uhlanganisa ubukhulu bezindleko zokukhetha.

Izixhumi Zokuxhumana: I-Ethernet, i-USB, i-Wi-Fi, i-CAN, i-Serial, i-SPI, i-I²C

Ukuhlela i-interface kufanele kufake phakathi isikhathi, ukumiswa, kanye nenkonzo yasensimini

I-Ethernet, i-USB, i-Wi-Fi, i-CAN, i-SPI, i-I²C, i-RS-485, kanye nezixhumi zekhamera zinemiphumela ehlukile kagesi kanye nesevisi. Indawo yokuxhuma, ukuvikelwa kwe-ESD, indlela yokubuyela emuva, ubude bekhebula, ukuvikela, kanye nokuxilongwa kubalulekile njengokuba nesixhumi esibonakalayo esidweliswe kuhlelo.

Izixhumi zokuxhumana ebhodini lokulawula irobhothi zivame ukufaka ingxube yamabhasi angaphandle nangaphakathi. Izixhumi zangaphandle zixhuma kumanethiwekhi, amakhompyutha amukelayo, namadivayisi abasebenzisi; izixhumi zangaphakathi zixhuma kuma-motor drive, izinzwa, namabhodi angaphandle. Isethi evamile yile:

• I-Ethernet: indinganiso ye-gigabit yamapulatifomu anzima kakhulu; i-100 Mbit kumadizayini abiza kakhulu. Ngokuvamile amachweba amabili: elilodwa langaphandle, elinye langaphakathi lamabhodi angaphandle.
• I-USB: ama-port e-host kanye namadivayisi ezesekeli zangaphandle, izixhumanisi zesevisi, kanye ne-computer ngezinye izikhathi engaphandle. I-USB 3.x kuzinhlelo zokusebenza ezisebenzisa idatha eningi.
• I-Wi-Fi ne-Bluetooth: ukuxhumana okungenantambo kwamarobhothi eselula namarobhothi esevisi yabathengi. Amamojula aqinisekisiwe ayathandwa ngenxa yokusebenza kahle kokulawula.
• INGABE: ukuxhumana kwangaphakathi kuma-motor drive kanye namabhodi angaphandle. Kuqinile ezindaweni ezinomsindo kagesi; kujwayelekile kumapulatifomu ezimboni kanye nezimoto.
• I-RS-485 noma i-RS-422: ukuxhumana okulandelanayo kumabhodi angaphandle, ngezinye izikhathi ukuze kusekelwe inzwa yakudala kanye ne-actuator.
• I-SPI kanye ne-I²C: ukuxhumana okungaphandle kwebhodi kuya ezinzwa zendawo kanye nama-IC amancane. Akuyona imiqondiso ethwalwa ngekhebula.

Ukukhetha okunezintambo noma okungenantambo kuncike endaweni yokusebenza kwerobhothi. Amarobhothi ezimboni ekufakweni okuhleliwe ngokuvamile asebenzisa i-Ethernet njengesixhumi esibonakalayo sangaphandle esiyinhloko; amarobhothi eselula asebenzisa i-Wi-Fi noma iselula; amarobhothi esevisi yabathengi asebenzisa noma yikuphi okudingwa ngumsebenzisi. Izinhlelo zivame ukunikeza ibhodi elifanayo elinezintambo kanye nelingenantambo ngoba izimo ezahlukene zokufakwa ziyazuza kuzixhumi ezihlukile. Izindleko ze-BOM zokwengeza okungenantambo ebhodini elivele line-Ethernet zincane; inzuzo yokuguquguquka inkulu.

Isikhombisi Somngcele: I-Motor Drive, Inzwa, I-Safety I/O, Isikhombisi Somsebenzisi

I-I/O ye-Peripheral kufanele ihlukanise imisebenzi yokuphepha, ukunyakaza, kanye nokulula

Imiyalo ye-motor-drive, okokufaka kwe-encoder, ukukhiya kokuphepha, izinkinobho ze-interface yomsebenzisi, kanye nezinzwa ezisizayo akufanele ziphathwe njenge-I/O engashintshaniswayo. Izindlela zokuphepha kanye nokunyakaza zidinga ukuziphatha okuqondile kanye nokumbozwa kokuxilonga; imisebenzi yokunethezeka ingabekezelela ukucashunwa okwengeziwe. Ukwakheka kwe-PCB kanye nokwakheka kwe-firmware kufanele kubonise lowo mehluko.

Ama-interfaces kuma-motor drive, ama-sensor, kanye ne-I/O yokuphepha achaza lokho ibhodi yokulawula engakuhlanganisa. Izinhlelo zamarobhothi zivame ukuthola kamuva ekuthuthukisweni ukuthi ukuxhumana kwe-peripheral kwakungahlelwanga kahle; ukufanisa isethi ye-interface nezidingo ze-peripheral ngesikhathi sokuklama kugwema ukufakelwa kabusha. Izinto eziyinhloko okufanele uzicabangele yilezi:

• Umyalo wokushayela imoto: I-CAN, i-EtherCAT, noma i-serial eyimfihlo kudrayivu ngayinye. Izinga le-loop kanye nezidingo ze-latency zinquma ukukhetha ibhasi.
• Impendulo ye-encoder: ngezinye izikhathi iqondiswe ebhodini lokulawula, ngezinye izikhathi idluliselwa ezimotweni zokushayela. Izinga lokujikeleza kanye nezidingo zokunemba kuqhuba ukukhetha.
• Ukufundwa kabusha kwenzwa: Ukufundwa kabusha kwe-analog kwezinzwa eziyisisekelo; ukufundwa kabusha kwedijithali kwezinzwa ezihlakaniphile. Ibhodi lesixhumi esibonakalayo sezinzwa lilayisha okuningi kwalokhu kumapulatifomu ayinkimbinkimbi.
• I/O yokuphepha: ukuma okuphuthumayo, okokufaka kokuphepha okuvela kumadivayisi angaphandle. Kuneziteshi ezimbili lapho ukwakheka kokuphepha kudinga khona.
• Isikhombimsebenzisi somsebenzisi: izinkinobho, izinkomba, kanye nokuxhumeka kwesibonisi kokuxhumana kwabasebenzisi bendawo. Ngezinye izikhathi kuhlanganiswe ebhodini lokulawula, ngezinye izikhathi ebhodini le-UI elihlukile.

Umehluko phakathi kwesethi yesixhumi esibonakalayo sebhodi lokulawula kanye nesethi yesixhumi esibonakalayo samabhodi angaphandle kubalulekile kokubili ekwakhiweni nasekukhiqizweni. Ibhodi lokulawula liphatha izixhumi eziyinhloko; amabhodi angaphandle aguqula lawo ma-interface abe yinoma yini umsebenzi wawo othize oyidingayo. Lokhu kuhlukaniswa kugcina ibhodi lokulawula ligxile ekuxhumaniseni nasekubaleni ngenkathi livumela amabhodi angaphandle ukuthi akhetheke ngemisebenzi yawo. Izinhlelo ezihlangana kakhulu ebhodini lokulawula zivame ukugcina zinebhodi eliyinkimbinkimbi kakhulu okunzima ukulihlela kabusha; izinhlelo ezihlukanisa kahle zikhiqiza amabhodi anomthwalo wemfanelo ocacile ngamunye.

Isitoreji, i-Boot, isibuyekezo se-Firmware, kanye ne-Boot Evikelekile

Isu lokubuyekeza i-Firmware lithinta izidingo zehadiwe ze-PCB

Ukuqalisa okuphephile, isitoreji sezithombe ezimbili, imodi yokutakula, ukufinyelela kokulungisa amaphutha, uhlelo lwezinombolo ze-serial, kanye nesitoreji sokulinganisa konke kudinga izinqumo zehadiwe. Amaqembu ahlehlisa isu lokubuyekeza kuze kube yilapho ukuhlanganiswa kwesofthiwe kuvame ukuthola ukuthi i-PCB ayinayo isitoreji, amaphini, ukufinyelela kokuhlola, noma ukulandelana kwamandla okudingekayo ukuze kubuyekezwe izinkundla eziqinile.

Indlela yokulungisa isitoreji, ukuqalisa, kanye ne-firmware ithinta ukugcinwa kwerobhothi kuyo yonke impilo yomkhiqizo. Amarobhothi athumela ngaphandle kwesakhiwo sesitoreji esifanele abhekana nobunzima bokuvuselelwa kwe-firmware ekusebenzeni. Izinto ezibalulekile okufanele uzicabangele yilezi:

• i-eMMC noma i-SD: isitoreji esivamile samapulatifomu e-SoC ekilasini le-Linux. I-eMMC ihlanganiswe nokuthembeka; I-SD isetshenziselwa imiklamo ebiza kakhulu enezidingo zokuthembeka ezincane.
• I-SSD yangaphandle: umthamo kanye nesivinini esiphezulu. Kuvamile kumapulatifomu azimele asebenzisa idatha eningi lapho kuqoshwa khona futhi kuhlelwe khona imephu yokufinyelela isidingo.
• I-firmware enezithombe ezimbili: izithombe ezimbili ze-firmware ezine-switchover lapho kuqaliswa iphutha. Umkhuba ojwayelekile wamarobhothi abuyekezwa ensimini ukuvimbela ukubhidlika ngesikhathi sokubuyekezwa kwe-OTA.
• Ibhuthi elivikelekile: ukuqinisekiswa kwe-cryptographic kwesiginesha ye-firmware lapho iqala ukusebenza. Okujwayelekile emikhiqizweni elawulwayo futhi okuvamile emikhiqizweni yezentengiselwano ukuze kuvikelwe.
• Ukucushwa okuqhubekayo: isitoreji esingaguquguquki sokucushwa kwerobhothi, ukulinganiswa, kanye nedatha yeyunithi ngayinye. I-EEPROM ejwayelekile noma isifunda se-flash esigciniwe.

Ukubuyiselwa emuva kokuvuselelwa kwe-firmware okuhlulekile kungenye yezindawo ezingatshalwanga kahle kakhulu kuma-elekthronikhi e-robotics. Irobhothi elisebenzisa kabi i-OTA ngesikhathi sokuvuselelwa kwe-OTA liba ucingo lwesevisi olubizayo. I-flash yesithombe esiphindwe kabili enokushintsha okuchaziwe ekuhlulekeni kokuqala ivimbela lolu hlobo lokwehluleka ngezindleko zehadiwe eziphansi - i-flash partition yesibili kanye nekhodi yokuqala ukuphatha ukukhethwa kwesithombe. Izinhlelo ezakha lokhu ekwakhiweni kusukela ekuqaleni zivikela imodi yokwehluleka ebingavela phakathi kwemikhankaso emikhulu ye-OTA.

Izinto Okufanele Uzicabangele Ngokuklanywa Ngokuqondene Namabhodi Okulawula Amarobhothi

Ukuhlelwa kwebhodi lokulawula kumele kulinganise isivinini esikhulu, amandla, kanye nokusebenza kahle

Amabhodi okulawula esimanje ahlanganisa inkumbulo ye-DDR, izixhumi ezisheshayo ezisheshayo, abalawuli bokushintsha, amamojula angenantambo, izinzwa, izixhumi, kanye nokufinyelela kokulungisa amaphutha. Ukuhlelwa okuhle kugcina izindlela zokubuya zimfushane, kuhlukanisa imigqa enomsindo kumasignali abucayi, kushiya izindawo zokuhlola ezifinyelelekayo, futhi kusekela ukulungiswa noma ukuxilonga lapho irobhothi lisebenza.

Izinto okufanele zicatshangelwe ngokuklanywa okuqondene namabhodi okulawula amarobhothi zihlanganisa imikhuba ejwayelekile yokubala ehlanganisiwe nezidingo ezithile zamarobhothi. Izinhlelo ezilandela zombili izigaba ndawonye zikhiqiza amabhodi athembekile; izinhlelo eziphatha amarobhothi njengezinto ezijwayelekile ezigxile kumarobhothi. Izinto ezibalulekile okufanele zicatshangelwe yilezi:

• Ukulandelana kwamandla: Ama-SoC kanye nama-power rails adinga ukuhleleka okucacisiwe ngesikhathi sokuvuselela nokuvala amandla. Amaphutha okulandelana abangela ukwehluleka kwe-boot noma i-latch-up.
• Ukungavikeleki kwe-EMI: ibhodi lokulawula kumele lenqabe umsindo ovela kuma-motor drive aseduze kanye nezinto zokushintsha. Ukuhlunga, ukuhlukanisa ukwakheka, kanye nokuvikela konke kuyasiza.
• Umklamo wokushisa: Ukushabalaliswa kwe-SoC kumele kufinyelele ekupholeni ngaphandle kokushisa ngokweqile. Isinamathiseli se-heatsink noma indlela yokuhamba komoya eklanyelwe eceleni kwesakhiwo sikagesi.
• Ukufinyelela kokulungisa iphutha: I-JTAG, i-UART console, noma ukufinyelela kokulungisa amaphutha kwe-Ethernet ukuze kuthuthukiswe futhi kusetshenzwe ensimini. Imindeni ejwayelekile yezixhumi kuyo yonke imikhiqizo ukuze kube nokuvumelana.
• Ukutholwa kwephutha: isibali sikhathi se-watchdog, i-brown-out detector, kanye nokuqapha impilo ebhodini lokulawula ngokwalo. Ibhodi eliqhuba irobhothi kumele libone nokuthi lehlulekile yini.

Izinhlelo eziphatha ibhodi lokulawula njengebhodi lokugcina eliklanywe ngokuvamile azinazo izinkinga zokuhlanganisa ebezizoba lula ukuzixazulula ngaphambilini. Isethi yesixhumi esibonakalayo sebhodi lokulawula ivimbela lokho amanye amabhodi angaba yikho. Ubukhulu bebhodi lokulawula buvimbela lapho lingena khona kurobhothi. Umthwalo wokushisa webhodi lokulawula uvimbela ukwakheka kokupholisa. Ukuklama ibhodi lokulawula kuqala - noma okungenani ekuqaleni komjikelezo wokuklama uhlelo - kunikeza amanye amabhodi inhloso yesixhumi esibonakalayo esizinzile futhi kuvimbela ukwakhiwa kabusha kwesigaba sokugcina.

Izidingo Zokukhiqiza, Ukuhlelwa Kwezinhlelo, kanye Nokuhlolwa Kwebhodi Lokulawula Amarobhothi

Ukukhiqiza kufanele kuqinisekise ubunikazi bokuqalisa, ukuxhumana, kanye nohlelo

Ukuhlolwa kwebhodi lokulawula akuphelele uma amalunga e-solder ebukeka elungile. Ukukhiqiza kufanele kuqinisekise ama-power rails, ukulandelana kwe-boot, ukufinyelela kwememori, inguqulo ye-firmware, ubunikazi obuhlukile, ama-interface amakhulu, kanye nanoma yikuphi ukulinganiswa kwezinga lebhodi. Lokho kudala ukuzethemba kokuthi ibhodi lokulawula selilungele ukuhlanganiswa kwesistimu.

Izinto okufanele uzicabangele ekukhiqizeni amabhodi okulawula amarobhothi zihambisana nenhlanganisela yokubala edingekayo aziphethe. I-fine-pitch BGA fanout, ukwakhiwa kwe-HDI, ukuvimbela okulawulwayo ku-memory kanye ne-interfaces yokuxhumana, kanye nohlelo lwe-firmware ekuhlanganisweni konke kuvela ekukhiqizweni kwebhodi lokulawula. Amakhono e-Highleap okukhiqiza ibhodi lokulawula afaka:

• Ukwakhiwa kwe-HDI: Izendlalelo eziningi ezinokwakheka kwe-microvia lapho kudingeka khona i-BGA fanout. I-1-N-1 ngokusebenzisa ikhono lanoma yiluphi ungqimba. Kuhlanganiswe ekhasini lomhlahlandlela wokuklama amarobhothi le-HDI PCB.
• I-impedance elawulwayo: ±10% ejwayelekile, iqine kakhulu uma iceliwe. Ukuqinisekiswa kwe-impedance ngenqwaba ngayinye ekukhiqizweni.
• I-SMT eqondile: Kusekelwa ama-passive angu-0.4 mm BGA kanye ne-01005. Ukuqeqeshwa kwenqubo kufaka phakathi ukuhlolwa kwe-SPI, i-AOI, kanye ne-X-ray.
• Ukuhlela i-Firmware: ukulayisha i-firmware yamakhasimende ekuhlanganisweni. Inombolo ye-serial ngayinye kanye nokusekelwa kwedatha yokulinganisa.
• Ukuhlolwa okusebenzayo: nge-firmware kanye ne-fixture enikezwe amakhasimende. Ukuhlolwa okuqondene nebhodi kufanelana nomklamo.
• Ukulandelela: idatha yokuhlola ngeyunithi ngayinye kanye namarekhodi ezingxenye zezingxenye asekela ukuthunyelwa kwezitifiketi zamakhasimende.

Ukukhiqizwa kwebhodi lokulawula eHighleap kuhlanganisa ubuchwepheshe obuxubile obusetshenziswa amabhodi okulawula amarobhothi esimanje: Ukwakhiwa kwe-HDI kwe-fanout ye-BGA, i-impedance elawulwayo yezixhumi zememori nokuxhumana, izindiza zamandla zesikali se-SoC zekhompyutha, kanye ne-SMT encane ye-passives encane ephethwe yibhodi lokulawula lesimanje ngekhulu. Ukuhlela i-Firmware ekuhlanganisweni ngokusekelwa kwedatha yokulinganisa ngeyunithi ngayinye kugcina umugqa wokuhlanganisa njengendawo yokuhlanganisa yemvelo yokwenza ngokwezifiso ezingeni leyunithi.

Imibuzo Evame Ukubuzwa Ngebhodi Lokulawula Amarobhothi

Iyini i-PCB yebhodi lokulawula irobhothi?

Ibhodi lokulawula irobhothi i-PCB iyibhodi eliyinhloko le-elekthronikhi elisebenzisa isofthiwe yohlelo lokusebenza, lixhumanisa ama-motor drive, lifunda izinzwa, liphatha ukuxhumana, ligcina ukucushwa, futhi liqondise ukuziphatha kwesistimu.

Ingabe ibhodi lokulawula irobhothi kufanele lisebenzise i-MCU noma i-SoC?

Sebenzisa i-MCU uma ukulawulwa okuqondile, amandla aphansi, kanye nesofthiwe elula kwanele. Sebenzisa i-SoC uma irobhothi lidinga isofthiwe yekilasi le-Linux, ukuqonda, ukuxhumana, i-UI, ukuloga idatha, noma ukubala okuphezulu. Amanye amarobhothi asebenzisa kokubili: i-MCU yokulawula kwesikhathi sangempela kanye ne-SoC yokucubungula uhlelo lokusebenza.

Yiziphi izixhumi ezivamile emabhodini okulawula amarobhothi?

Izixhumi ezivamile zifaka phakathi i-Ethernet, i-USB, i-Wi-Fi, i-Bluetooth, i-CAN, i-RS-485, i-SPI, i-I²C, i-UART, ikhamera ye-MIPI, i-LVDS, i-GPIO, okokufaka kwe-encoder, i-Safety I/O, ama-debug port, kanye nama-expansion headers. Ukuxubana okuqondile kuncike ekwakhiweni kwerobhothi.

Kungani amabhodi okulawula amarobhothi edinga impedance elawulwayo?

I-impedance elawulwayo iyadingeka kwimemori yesivinini esikhulu, i-Ethernet, i-USB, i-PCIe, izixhumanisi zekhamera, i-LVDS, nezinye izixhumi ezisheshayo. Igcina ukubonakaliswa kwesignali namaphutha esikhathi ngaphakathi kwemingcele futhi kufanele kuchazwe ngesixhumi ngasinye.

Yimaphi amaphutha avamile okuhlelwa kwebhodi lokulawula irobhothi?

Amaphutha avamile afaka phakathi izindlela zokubuya ezimbi, izindawo ezinomsindo nezibucayi ezixubile, ukuhlela okunganele kwendiza kagesi, izindawo zokulungisa amaphutha ezingafinyeleleki, ukuvikelwa okubuthakathaka kwe-ESD, ukufakwa kwesixhumi okungqubuzana nezintambo, kanye nezindlela zokushisa ezinganele ze-SoC noma abalawuli bamandla.

Kufanele kuphathwe kanjani izinhlelo ze-firmware ngesikhathi se-PCBA?

Ukuhlela i-firmware kufanele kufake isithombe esifanele, irekhodi lenguqulo, ukuqinisekiswa kokuhlela, inombolo ye-serial ehlukile noma ikheli le-MAC lapho kudingeka khona, ukuqoqwa kwedatha yokulinganisa, kanye nendlela yokutakula uma ukuhlela kwehluleka.

Ingabe amabhodi okulawula amarobhothi adinga ibhuthi elivikelekile?

Ukuqalisa okuphephile kuyasiza uma irobhothi lixhunywe kunethiwekhi, lihambisana nokuphepha, lingabuyekezwa ensimini, noma lisetshenziswa kwezentengiselwano. Kuyasiza ekuvimbeleni i-firmware engagunyaziwe ukuthi isebenze, kodwa idinga ihadiwe ehambisanayo, ukuphathwa kokhiye, kanye nenqubo yokubuyekeza ehleliwe.

Yiziphi izivivinyo ezibalulekile ekukhiqizweni kwebhodi lokulawula amarobhothi?

Ukuhlolwa okubalulekile kufaka phakathi ukuqinisekiswa kwesitimela samandla, ukuhlolwa kokuqalisa, ukuhlolwa kwememori, ukuqinisekiswa kwe-firmware, ukuhlolwa kwesixhumi sokuxhumana, amarekhodi ohlelo, ukuhlolwa kwesixhumi esibucayi se-ESD, kanye nokuhlolwa kokusebenza okunezingxenye ezimele.