Imininingwane ye-USB 2.0 & Ulwazi Lomxhuma
I-USB 2.0 iyinhlangano evamile ye- Universal Serial Bus (USB). Cishe wonke amadivayisi anamandla we-USB, futhi cishe zonke izintambo ze-USB, ukwesekwa okungenani i- USB 2.0.
Amadivaysi ahambisana nesilinganiso se-USB 2.0 anakho ukudlulisela idatha ngesivinini esiphezulu se-480 Mbps. Lokhu kuyashesha kunezinga elidala le-USB 1.1 futhi lihamba kancane kunezinga elisha le-USB 3.0 .
I-USB 1.1 ikhishwe ngo-Agasti 1998, i-USB 2.0 ngo-Ephreli 2000, ne-USB 3.0 ngoNovemba 2008.
Qaphela: I- USB 2.0 ivame ukubizwa nge- Hi-Speed USB .
Izixhumi ze-USB 2.0
Qaphela: I- plug yigama elinikezwe isixhumi sesilisa kwikhebula le-USB 2.0 noma i- flash drive , ngenkathi i- receptacle igama elinikezwe isixhumi sesifazane kudivayisi ye-USB 2.0 noma ikhebula lesandiso.
- Uhlobo lwe-A A : Lezi zixhumanisi zibizwa nge-USB 2.0 Standard-A futhi ziyizixhumi ze-USB ezixubile ngokuphelele ozothola kumadivayisi amaningi angewona weselula. I-USB 2.0 Uhlobo A izixhumi zihambisana ngokomzimba nalabo abavela ku-USB 3.0 ne-USB 1.1.
- Uhlobo lwe-B B : Lezi zixhumanisi zibizwa nge-USB 2.0 Standard-B futhi ziyikwele ngaphandle kwefolda encane phezulu. Ama-plug ye-USB 2.0 we-B B ahambisanayo nama-USB 3.0 ne-USB 1.1 Uhlobo lwezingxenye ze-B kodwa ama-plug USB 3.0B B awahambisani ahambisana ne-USB 2.0 Type B.
- I-USB Micro-A: Lezi zixhumanisi, ikakhulukazi ama-plugs, zibukeka njengezinguqulo ezincane zezixhumi ze-USB 2.0 ze-A A. I-USB 2.0 Micro-A i-plugs iyahambisana nendawo zombili ze-USB 2.0 Micro-AB nezintambo ze-USB 3.0 Micro-AB. Kodwa-ke, ama-plugs we-USB 3.0 amasha ama-USB angeke afane ne-USB 2.0 Micro-AB.
- I-USB Micro-B: Lezi zixhumanisi ziyingcosana futhi ziyi-rectangular kodwa izingxenyana ezimbili ngakolunye uhlangothi zitshalwe esikhundleni sesikwele. Amaprogiji we-USB 2.0 we-USB 2.0 ahambisana neziqukathi ezine: kokubili i-USB 2.0 ne-USB 3.0 Micro-B kanye ne-Micro-AB izimvume. Amaphakheji ama-Micro-B ama-USB amasha angu-3.0 awahambelani emuva ehambisana ne-USB 2.0 Micro receptacle.
- I-USB Mini-A: Lezi zixhumanisi zincane futhi ikakhulukazi zixube ngehlangothi elilodwa kakhulu. Ama-plugs we-USB 2.0 Mini-A ahambisana kuphela nezibhamu ze-USB 2.0 Mini-AB.
- I-USB Mini-B: Lezi zixhumanisi ziyingcosana futhi ikakhulukazi ziyi-mctangular ngezikhawulo ezibonakalayo ezinhlangothini ezimfushane. Amaphakheji we-USB 2.0 Mini-B ahambisana ne-USB 2.0 Mini-B ne-USB 2.0 Mini-AB izithiyo.
Qaphela: I- USB kuphela ye-USB isekela i-USB Mini-A, i-USB Mini-B, ne-USB Mini-AB.
Bheka Ishadi lethu lokuvumelanisa ngokomzimba le-USB elibhekiselwe ekhasini elilodwa lalokho okuhambisana nalokho.
Ukushesha kweDivaysi exhunyiwe
Amadivaysi asebekhulile i-USB 1.1 namakhodi, ikakhulukazi, ahambisana ngokomzimba ne-USB 2.0 hardware. Noma kunjalo, indlela kuphela yokufinyelela ngesivinini sokudlulisela i-USB 2.0 uma ngabe wonke amadivaysi nezincingo zixhunyiwe komunye nomunye ukwesekwa kwe-USB 2.0.
Uma, isibonelo, unedivayisi ye-USB 2.0 esetshenziselwa ikhebula le-USB 1.0, isivinini se-1.0 sizosetshenziswa kungakhathaliseki ukuthi idivayisi isekela i-USB 2.0 ngoba lelo cube alisekeli elisha, ngesivinini esisheshayo.
Amadivayisi we-USB 2.0 nezintambo ezisetshenziselwa amadivaysi e-USB 3.0 nezincingo, ezicabanga ukuthi zihambisana ngokomzimba, zizosebenza ngejubane eliphansi le-USB 2.0.
Ngamanye amazwi, ijubane lokudlulisela liwela kumdala wezobuchwepheshe ezimbili. Lokhu kunengqondo ngoba awukwazi ukudonsa i-USB 3.0 ngesivinini ngaphandle kwekhebula le-USB 2.0, futhi ungathola ukuvinjelwa kwe-USB 2.0 ngokusebenzisa ikhebula le-USB 1.1.
I-USB On-the-Go (OTG)
I-USB On-the-Go ikhishwe ngoDisemba 2006, emva kwe-USB 2.0 kodwa ngaphambi kwe-USB 3.0. I-OTG ye-USB ivumela amadivayisi ukuthi ashintshe phakathi kokusebenza njengomphathi futhi njengesigqila uma kunesidingo ukuze bakwazi ukuxhunyaniswa ngqo.
Isibonelo, i-smartphone 2.0 noma ithebhulethi ye-USB 2.0 ingakwazi ukudonsa idatha ku-flash drive njengesibambi kodwa ishintshe kumodi yesigqila uma ixhunywe kukhompyutha ukuze ulwazi lithathwe kuwo.
Idivayisi ehlinzeka amandla (umphathi) ibhekwa njenge-OTG A-device ngenkathi idla amandla (isigqila) ibizwa ngokuthi i-B-device. Inceku isebenza njengedivaysi yensiza kule hlobo lokusetha.
Ukushintsha izindima kwenziwa ngokusebenzisa i-Host Negotiation Protocol (HNP), kodwa ukukhetha ngokomzimba ukuthi iyiphi idivayisi ye-USB 2.0 okufanele ibhekwe njengesigqila noma isingathwa ngokuzenzakalelayo kulula njengokukhetha ukuthi yikuphi ukuphela kwekhebula idivayisi exhunyiwe kuyo.
Ngezinye izikhathi, ukuvota kwe-HNP kuzokwenziwa ngumninimzi ukuze kunqunywe ukuthi ngabe isigqila sicela ukuba sibe ummemezeli, uma kunjalo bangashintsha izindawo. I-USB 3.0 isebenzisa ukuvota kwe-HNP futhi kodwa ibizwa ngokuthi i-Role Swap Protocol (RSP).