Isilawuli USB Universal Bus ye-serial: incazelo kanye nesikhundla wesifunda okunengqondo

Universal yomkhiqizo Bus USB - kungcono zithandwa PC esibonakalayo. Ingasetshenziselwa ukuxhuma amadivayisi ezahlukene 127 kanyekanye. Asekela umsebenzi uxhumano on / ukuvala amadivayisi, kungekho isidingo uvale i-computer. amadivaysi Connectable kungenzeka inikwa amandla yi ngqo nge-USB ibhasi, isidingo eyengeziwe segezi. Namuhla sikhuluma ngaleli lungiselelo, isilawuli jikelele serial ibhasi le-USB. Sizohlola injongo yawo nokuthi izinhlobo ezikhona njengamanje.

Kungani kufaneleka ukuba kube isilawuli jikelele serial USB ibhasi?

Lezi amadivayisi ayingxenye yesikhulumi kwikhompyutha, ukuhlinzeka umlayezo exhunywe kwi-USB ibhasi kumadivayisi angaphandle. Isilawuli USB Universal Bus yomkhiqizo - kuyinto kudivayisi ezihlakaniphile ukuthi akwazi ukuxhumana ngaphandle kokudabula CPU, inkumbulo sekhompyutha ku ngokusebenzisa ukufinyelela imodi. Ngu uhlobo ukuhlanganiswa, lezi amadivaysi kungenziwa baqashwe njengengxenye logic uhlelo noma njengendlela chip ehlukile njengoba umbadlana uqobo, futhi akude (ukunwetshwa ikhadi). Ngu indlela abalawuli yokuxhuma Universal Bus yomkhiqizo zamadivayisi e-USB kuhluke ebhasini PCI futhi PCI amabhasi Express.

Imininingwane izinhlobo-USB abalawuli

Ukuze USB1.1 sebhithi inikeza izinhlobo ezimbili ukuqaliswa mishini. Ngokwesibonelo, i-isilawuli USB1.0, Intel uye wazakhela USB ibhasi serial izinhlobo ezimbili - UHCI futhi OHCI. umehluko yabo amanga kuphela indlela ukufinyelela amarejista: usomqulu yohlobo yokuqala ahlelwe esikhaleni ngokwakhayo uhlelo izimbobo, obhekene input bese okukhipha ulwazi, kanye logic amasekethe uhlobo lwesibili kukhona esikhaleni inkumbulo ye-computer siqu. Phawula ukuthi uhlobo USB isilawuli OHCI kubhekwe nohlakaniphe ukudlula UHCI, kusukela ukwazi ukukhulula processor main ekutheni ukwenza njengomunye wemisebenzi evamile ehambisana ne-ukudluliswa kwedatha ngaphezulu kwe-USB sikhwela ibhesi. Bobabili abalawuli asetshenziswa-32-bit ekhuluma.

Ukuze USB2.0 isilawuli yakhelwe USB jikelele ibhasi serial uhlobo EHCI, elikwaziyo ukuze basekele umsebenzi ngesivinini (480 Mbit / s). Kuyo, sibonga ukuthengiselana yokuhlukanisa esekela ongaphakeme-speed USB1.1 esibonakalayo, okuyinto ebaluleke kakhulu amadivayisi kancane.

Ukuze USB3.0 badinga jikelele isilawuli uhlobo XHCI. It uyakwazi ukusekela exchange kolwazi ngasiphi isivinini.

isiphetho

Ngakho, uma umnikazi ikhompyutha kudala ifakwe-USB izimbobo, ungakhathazeki: ngokusebenzisa kutlhogeka bona kulungiswe, ungafaka i-USB isilawuli. Amadivayisi anjalo abazenzi ngesimo ukunwetshwa ikhadi PCI-hlobo noma i-PC-namakhadi laptops. Lezi abalawuli ayatholakala nge USB1.0 ukwesekwa 2.0 no-3.0. Uma unqume ukuzibizela eyodwa yalezi amadivaysi, ayeke okukhethayo ngesivinini, okuhle, izindleko cishe okufanayo. Esinye isibonelo: uma PC yakho isekela i-USB kuphela version 1.0 noma 1.1, ungasetha isilawuli ukuhlinzeka version 3.0.