Kana kugadziraPCB nzira, nekuda kwebasa rekutanga rekuongorora harina kuitwa kana kuti risina kuitwa, iyo post-processing yakaoma. Kana bhodhi rePCB richifananidzwa neguta redu, zvikamu zvakafanana nemutsara pamusoro pemutsara wemarudzi ose ezvivakwa, mitsetse yechiratidzo imigwagwa uye mikoto muguta, flyover inotenderera chitsuwa, kubuda kwemugwagwa wega wega kuronga kwayo kwakadzama, wiring iri zvakare. zvimwe chete.
1. Wiring zvakakosha zvinodiwa
A) Mitsetse yakakosha yechiratidzo inosarudzwa: magetsi, analogi diki siginecha, high-speed chiratidzo, wachi chiratidzo, synchronization chiratidzo uye mamwe masaini masaini anodiwa.
B) Wiring density yakakosha musimboti: Tanga wiring kubva kune chikamu neyakaomesesa yekubatanidza hukama pabhodhi. Cabling inotanga kubva panzvimbo yakanyanya kubatanidzwa pabhodhi.
C) Chengetedzo yekiyi yekugadziriswa kwechiratidzo: edza kupa yakakosha wiring layer yeakakosha masaini senge wachi chiratidzo, yakakwirira-frequency siginecha uye inonzwisisika chiratidzo, uye simbisa iyo shoma loop nzvimbo. Kana zvichidikanwa, kudzivirira uye kuwedzera nzvimbo yekuchengetedza inofanira kutorwa. Iva nechokwadi chemhando yechiratidzo.
D) Iyo network ine impedance control inodiwa icharongedzerwa pane iyo impedance control layer, uye chiratidzo chayo chekuyambuka-chikamu chinodzivirirwa.
2.Wiring scrambler control
A) Kududzirwa kweiyo 3W musimboti
Nharaunda pakati pemitsetse inofanira kuva katatu paupamhi hwemutsara. Kuti uderedze crosstalk pakati pemitsetse, mutsara wemitsara unofanirwa kunge wakakura zvakakwana. Kana mutsara wepakati kureba isiri pasi pe3 nguva yehupamhi hwemutsara, 70% yemagetsi emagetsi pakati pemitsara inogona kuchengetwa pasina kupindira, iyo inonzi 3W mutemo.
B) Tampering control: CrossTalk inoreva kupindirana pakati pemataneti akasiyana paPCB kunokonzerwa neakareba akaenzana wiring, kunyanya nekuda kwechiito chekugovera capacitance uye kugovera inductance pakati pemitsetse yakafanana. Matanho makuru ekukunda crosstalk ndeaya:
I. Wedzera nzvimbo yeparallel cabling uye tevera mutemo we3W;
Ii. Isa pasi tambo dzekuzviparadzanisa pakati petambo dzakafanana
Iii. Deredza chinhambwe pakati pekabheji layer uye ndege yepasi.
3. Mitemo yakawanda yezvinodiwa zve wiring
A) Kutungamira kwendege iri pedyo ndeye orthogonal. Dzivisa mitsara yakasiyana-siyana yechiratidzo mumutsara wakatarisana nenzira imwechete kuti uderedze zvisina kufanira inter-layer tampering; Kana mamiriro ezvinhu aya akaoma kudzivirira nekuda kwekumisikidzwa kwechimiro chebhodhi (senge dzimwe ndege dzekumashure), kunyanya kana chiyero chechiratidzo chakakwira, iwe unofanirwa kufunga nezvekutsaura wiring akaturikidzana mundege yepasi uye tambo dzechiratidzo pasi.
B) Iyo wiring yemidziyo midiki discrete inofanirwa kuenderana, uye iyo SMT pad inotungamira ine nzvimbo iri padyo inofanira kubatanidzwa kubva kunze kwepadhi. Kubatana kwakananga pakati pepadhi hakubvumirwi.
C) Minimum loop rule, kureva kuti, nzvimbo yechiuno yakaumbwa nemutsara wechiratidzo uye chiuno chayo chinofanira kuva chidiki sezvinobvira. Iyo diki nzvimbo yechiuno, iyo inoderera nemwaranzi yekunze uye idiki kupindira kwekunze.
D) STUB tambo hadzibvumidzwe
E) Iyo wiring hupamhi hwetiweki imwechete inofanira kuchengetwa yakafanana. Kusiyana kwehupamhi hwe wiring kuchakonzera kusaenzana kwemaitiro impedance yemutsara. Kana iyo yekumhanyisa kumhanya yakakwira, kuratidza kuchaitika. Pasi pemamwe mamiriro ezvinhu, akadai sechibatanidza kutungamirira waya, BGA pasuru kutungamirira waya yakafanana chimiro, nokuti diki spacing vangasakwanisa kudzivisa kuchinja mutsetse upamhi, anofanira kuedza kuderedza hunobudirira kureba pakati isingawirirani chikamu.
F) Dzivirira tambo dzechiratidzo kubva pakugadzira self-loops pakati pezvikamu zvakasiyana. Rudzi urwu rwedambudziko ruri nyore kuitika mukugadzirwa kwemahwendefa akawanda, uye iyo yega-loop inokonzeresa kukanganiswa kwemwaranzi.
G) Acute Angle uye kona yekurudyi inofanirwa kudzivirirwa mukatiPCB dhizaini, zvichikonzera mwaranzi isingakoshi, uye maitiro ekugadzira maitiro ePCBhazvina kunaka.
