Isayensi Ethandwayo ye-USB 3.2 (Ingxenye 2)

Isayensi Ethandwayo ye-USB 3.2 (Ingxenye 2)

Ku-USB 3.2 specification, isici sesivinini esiphezulu se-USB Type-C sisetshenziswa ngokugcwele. I-USB Type-C ineziteshi ezimbili zokudlulisa idatha zesivinini esiphezulu, ezibizwa ngokuthi (TX1+/TX1-, RX1+/RX1-) kanye ne (TX2+/TX2-, RX2+/RX2-). Ngaphambilini, i-USB 3.1 yayisebenzisa eyodwa yeziteshi kuphela ukudlulisa idatha, kanti enye isiteshi ikhona njengesipele. Ku-USB 3.2, zombili iziteshi zingavulwa ngaphansi kwezimo ezifanele futhi zifinyelele isivinini esiphezulu sokudlulisa esingu-10 Gbps esiteshini ngasinye, okuholela ku-20 Gbps isiyonke. Ngokufaka ikhodi engu-128b/132b, isivinini sangempela sedatha singafinyelela cishe ku-2500 MB/s, okuwukuphindwa kabili okuqondile uma kuqhathaniswa ne-USB 3.1 yamanje. Kubalulekile ukuqaphela ukuthi ukushintsha kwesiteshi ku-USB 3.2 akudingi nhlobo ukusebenza okukhethekile kumsebenzisi.

Indlela yokucubungula isignali kanye nokuvikela yekhebula le-USB3.1 ihambisana neye-USB3.0. Ukulawulwa kwe-impedance komugqa we-differential ovikelwe yi-SDP kulawulwa ku-90Ω ± 5Ω, kanti umugqa we-coaxial one-end-one ulawulwa ku-45Ω ± 3Ω. Ukulibaziseka kwangaphakathi kwe-differential pair kungaphansi kuka-15ps/m, kanti okunye ukulahlekelwa kokufakwa kanye nezinye izinkomba kuhambisana ne-USB3.0. Isakhiwo sekhebula sikhethwa ngokwesimo sohlelo lokusebenza kanye nezidingo zomsebenzi kanye nesigaba: I-VBUS: izintambo ezi-4 ukuqinisekisa ukugeleza kwe-voltage kanye nogesi; I-Vconn: Ehlukile ku-VBUS, inikeza kuphela ububanzi be-voltage obungu-3.0~5.5V; inikeza amandla kuphela ku-chip yekhebula; I-D+/D-: Isignali ye-USB 2.0; ukusekela ukufakwa phambili nokuhlehla, kunezibhangqa ezimbili zesignali ohlangothini lwesokhethi; I-TX+/- kanye ne-RX+/-: Amaqembu ama-2 esignali, izibhangqa ezine zesignali, ukusekela ukufakwa phambili nokuhlehla; I-CC: isignali yokucushwa, eqinisekisa futhi ephatha ukuxhumana phakathi komthombo kanye netheminali; I-SUB: isignali yomsebenzi wokunweba, ingasetshenziswa kumsindo.

Uma i-impedance yomugqa wokuhlukanisa ovikelwe ilawulwa ku-90Ω ± 5Ω, futhi kusetshenziswa umugqa we-coaxial, ukubuya komhlaba wesignali kuhamba nge-GND evikelwe. Emigqeni ye-coaxial ene-single-end, i-impedance ilawulwa ku-45Ω ± 3Ω. Kodwa-ke, ukukhetha amaphuzu okuxhuma kanye nesakhiwo sekhebula kuncike ezimweni zohlelo lokusebenza kanye nobude bezintambo ezahlukene.

I-USB 3.2 Gen 1×1 – Isivinini esikhulu, izinga lokusayina idatha elingu-5 Gbit/s (0.625 GB/s) ngaphezulu komzila owodwa kusetshenziswa ikhodi ye-8b/10b, efana ne-USB 3.1 Gen 1 kanye ne-USB 3.0.
I-USB 3.2 Gen 1×2 – I-SuperSpeed+, izinga elisha ledatha elingu-10 Gbit/s (1.25 GB/s) emigqeni emibili kusetshenziswa ikhodi ye-8b/10b.
I-USB 3.2 Gen 2×1 – Isilinganiso sedatha se-SuperSpeed+, 10 Gbit/s (1.25 GB/s) ngaphezulu komzila owodwa kusetshenziswa ikhodi ye-128b/132b, efana ne-USB 3.1 Gen 2.
I-USB 3.2 Gen 2×2 – I-SuperSpeed+, izinga elisha ledatha elingu-20 Gbit/s (2.5 GB/s) emigqeni emibili kusetshenziswa ikhodi ye-128b/132b.