I-USB 3.2 Isayensi Edumileyo (Icandelo lesi-2)

I-USB 3.2 Isayensi Edumileyo (Icandelo lesi-2)

Kwi-USB 3.2 specifications, uphawu olukhawulezayo lwe-USB Type-C lusetyenziswa ngokupheleleyo. I-USB Type-C ineetshaneli ezimbini zokudlulisa idatha ezikhawulezayo, ezibizwa ngokuba yi (TX1+/TX1-, RX1+/RX1-) kunye ne (TX2+/TX2-, RX2+/RX2-). Ngaphambili, i-USB 3.1 yayisebenzisa enye yeetshaneli kuphela ukudlulisa idatha, enye itshaneli ikhona njenge-backup. Kwi-USB 3.2, zombini iitshaneli zinokuvulwa phantsi kweemeko ezifanelekileyo kwaye zifikelele kwisantya esiphezulu sokudlulisa se-10 Gbps kwitshaneli nganye, nto leyo ebangela ukuba i-20 Gbps iyonke ibe yi-20. Ngokufaka ikhowudi ye-128b/132b, isantya sokwenyani sedatha sinokufikelela malunga ne-2500 MB/s, nto leyo ephindaphindayo ngokuthe ngqo xa kuthelekiswa ne-USB 3.1 yangoku. Kubalulekile ukuqaphela ukuba ukutshintsha kwetshaneli kwi-USB 3.2 akunamthungo kwaye akudingi misebenzi ikhethekileyo kumsebenzisi.

Indlela yokucubungula isignali kunye nokukhusela yentambo ye-USB3.1 ihambelana neye-USB3.0. Ulawulo lwe-impedance lomgca we-SDP okhuselweyo ohlukeneyo lulawulwa kwi-90Ω ± 5Ω, kwaye umgca we-coaxial onesiphelo esinye ulawulwa kwi-45Ω ± 3Ω. Ukulibaziseka kwangaphakathi kwesibini sokwahluka kungaphantsi kwe-15ps/m, kwaye enye ilahleko yokufakelwa kunye nezinye izalathisi zihambelana ne-USB3.0. Ulwakhiwo lwentambo lukhethwa ngokwemeko yesicelo kunye neemfuno zomsebenzi kunye nodidi: I-VBUS: Iingcingo ezi-4 ukuqinisekisa ukuhamba kwe-voltage kunye nomsinga; I-Vconn: Yahlukile kwi-VBUS, ibonelela kuphela ngoluhlu lwe-voltage lwe-3.0~5.5V; inika amandla kuphela kwi-chip yentambo; I-D+/D-: Isignali ye-USB 2.0; ukuxhasa ukufakwa kwangaphambili kunye nokubuyela umva, kukho iipere ezimbini zezibonakaliso kwicala lesokethi; I-TX+/- kunye ne-RX+/-: Amaqela ama-2 ezibonakaliso, iipere ezi-4 zezibonakaliso, ezixhasa ukufakwa kwangaphambili kunye nokubuyela umva; I-CC: isignali yoqwalaselo, eqinisekisa kwaye ilawula unxibelelwano phakathi komthombo kunye nesiphelo; I-SUB: isignali yomsebenzi wokwandisa, ingasetyenziselwa isandi.

Ukuba i-impedance yomgca ohlukanisiweyo okhuselweyo ilawulwa kwi-90Ω ± 5Ω, kwaye kusetyenziswa umgca we-coaxial, ukubuya komhlaba wesignali kuhamba nge-GND ekhuselweyo. Kwimigca ye-coaxial enesiphelo esinye, i-impedance ilawulwa kwi-45Ω ± 3Ω. Nangona kunjalo, ukhetho lweendawo zonxibelelwano kunye nesakhiwo sekhebula luxhomekeke kwiimeko zesicelo kunye nobude beentambo ezahlukeneyo.

I-USB 3.2 Gen 1×1 – Isantya esiphezulu, i-5 Gbit/s (0.625 GB/s) isantya sokubonisa idatha ngaphezulu kwendlela enye kusetyenziswa i-8b/10b encoding, efana ne-USB 3.1 Gen 1 kunye ne-USB 3.0.
I-USB 3.2 Gen 1×2 – I-SuperSpeed+, isantya sedatha esitsha se-10 Gbit/s (1.25 GB/s) kwiindlela ezimbini kusetyenziswa i-8b/10b encoding.
I-USB 3.2 Gen 2×1 – Isantya sedatha seSuperSpeed+, 10 Gbit/s (1.25 GB/s) ngaphezulu kwendlela enye kusetyenziswa i-128b/132b encoding, efanayo ne-USB 3.1 Gen 2.
I-USB 3.2 Gen 2×2 – I-SuperSpeed+, izinga ledatha elitsha le-20 Gbit/s (2.5 GB/s) kwiindlela ezimbini kusetyenziswa i-128b/132b encoding.