Kimiyyar Fasaha ta USB 3.2 (Kashi na 2)

Kimiyyar Fasaha ta USB 3.2 (Kashi na 2)

A cikin ƙayyadadden bayanin USB 3.2, an yi amfani da fasalin babban gudu na USB Type-C gaba ɗaya. USB Type-C yana da tashoshi biyu na watsa bayanai masu sauri, masu suna (TX1+/TX1-, RX1+/RX1-) da (TX2+/TX2-, RX2+/RX2-). A da, USB 3.1 yana amfani da ɗaya daga cikin tashoshi kawai don aika bayanai, tare da ɗayan tashar yana nan azaman madadin. A cikin USB 3.2, ana iya kunna tashoshi biyu a ƙarƙashin yanayi masu dacewa kuma suna cimma matsakaicin saurin watsawa na 10 Gbps ga kowane tasha, wanda ke haifar da jimlar 20 Gbps. Tare da lambar ɓoyewa ta 128b/132b, ainihin saurin bayanai na iya kaiwa kimanin 2500 MB/s, wanda shine ninka kai tsaye idan aka kwatanta da USB 3.1 na yanzu. Ya kamata a lura cewa sauyawar tashar a cikin USB 3.2 ba ta da matsala kuma baya buƙatar wani aiki na musamman daga mai amfani.

Hanyar sarrafa siginar da kariya ta kebul na USB3.1 ta yi daidai da ta USB3.0. Ana sarrafa ikon hana shiga layin bambancin kariya na SDP a 90Ω ± 5Ω, kuma layin coaxial mai ƙarewa ɗaya ana sarrafa shi a 45Ω ± 3Ω. Jinkirin ciki na nau'in bambancin bai wuce 15ps/m ba, kuma sauran asarar shigarwa da sauran alamomi sun yi daidai da USB3.0. Tsarin kebul an zaɓi shi bisa ga yanayin aikace-aikacen da buƙatun aiki da rukuni: VBUS: Wayoyi 4 don tabbatar da kwararar ƙarfin lantarki da halin yanzu; Vconn: Sabanin VBUS, yana ba da kewayon ƙarfin lantarki na 3.0~5.5V kawai; yana ba da wutar lantarki ga guntu na kebul; D+/D-: siginar USB 2.0; don tallafawa shigarwa gaba da baya, akwai nau'ikan sigina guda biyu a gefen soket; TX+/- da RX+/-: ƙungiyoyi 2 na sigina, nau'ikan sigina 4, suna tallafawa shigarwa gaba da baya; CC: siginar daidaitawa, tabbatarwa da sarrafa haɗin tsakanin tushe da tashar; SUB: siginar aikin faɗaɗawa, ana iya amfani da ita don sauti.

Idan aka sarrafa impedance na layin bambancin kariya a 90Ω ± 5Ω, kuma aka yi amfani da layin coaxial, dawowar siginar ƙasa ta hanyar GND mai kariya ne. Ga layukan coaxial masu ƙarewa ɗaya, impedance ɗin ana sarrafa shi a 45Ω ± 3Ω. Duk da haka, zaɓin wuraren haɗi da tsarin kebul ya dogara ne akan yanayin aikace-aikacen da tsawon kebul daban-daban.

USB 3.2 Gen 1×1 – Saurin siginar bayanai na SuperSpeed, 5 Gbit/s (0.625 GB/s) a kan layi 1 ta amfani da lambar 8b/10b, iri ɗaya da USB 3.1 Gen 1 da USB 3.0.
USB 3.2 Gen 1×2 – SuperSpeed+, sabon saurin bayanai na 10 Gbit/s (1.25 GB/s) akan layuka 2 ta amfani da lambar 8b/10b.
USB 3.2 Gen 2×1 – SuperSpeed+, ƙimar bayanai 10 Gbit/s (1.25 GB/s) akan layi 1 ta amfani da lambar ɓoyewa 128b/132b, iri ɗaya da USB 3.1 Gen 2.
USB 3.2 Gen 2×2 – SuperSpeed+, sabon saurin bayanai na 20 Gbit/s (2.5 GB/s) akan layuka 2 ta amfani da lambar 128b/132b.