Sayansi Yotchuka ya USB 3.2 (Gawo 2)

Sayansi Yotchuka ya USB 3.2 (Gawo 2)

Mu mawonekedwe a USB 3.2, mawonekedwe a liwiro la USB Type-C amagwiritsidwa ntchito mokwanira. USB Type-C ili ndi njira ziwiri zotumizira deta mwachangu, zotchedwa (TX1+/TX1-, RX1+/RX1-) ndi (TX2+/TX2-, RX2+/RX2-). Kale, USB 3.1 inkagwiritsa ntchito njira imodzi yokha kutumiza deta, ndipo njira inayo inalipo ngati chosungira. Mu USB 3.2, njira zonse ziwiri zimatha kuyatsidwa pansi pazifukwa zoyenera ndikupeza liwiro lalikulu lotumizira la 10 Gbps pa njira iliyonse, zomwe zimapangitsa kuti 20 Gbps yonse ifike. Ndi 128b/132b encoding, liwiro lenileni la deta likhoza kufika pafupifupi 2500 MB/s, zomwe ndi kuwirikiza kawiri mwachindunji poyerekeza ndi USB 3.1 yomwe ilipo. Ndikofunikira kudziwa kuti kusintha kwa njira mu USB 3.2 ndikosavuta ndipo sikufuna ntchito zapadera kuchokera kwa wogwiritsa ntchito.

Njira yogwiritsira ntchito chizindikiro ndi chitetezo cha chingwe cha USB3.1 ikugwirizana ndi ya USB3.0. Kuwongolera kwa impedance kwa mzere wosiyana wa SDP wotetezedwa kumayendetsedwa pa 90Ω ± 5Ω, ndipo mzere wa coaxial wokhala ndi mapeto amodzi umayendetsedwa pa 45Ω ± 3Ω. Kuchedwa kwamkati kwa awiri osiyanitsa ndi kochepera 15ps/m, ndipo kutayika kwina kolowera ndi zizindikiro zina zimagwirizana ndi USB3.0. Kapangidwe ka chingwe kamasankhidwa malinga ndi momwe ntchito ikuyendera komanso zofunikira pa ntchito ndi gulu: VBUS: mawaya 4 kuti atsimikizire kuyenda kwa magetsi ndi magetsi; Vconn: Mosiyana ndi VBUS, imapereka mphamvu yamagetsi ya 3.0~5.5V yokha; imapereka mphamvu ku chip ya chingwe; D+/D-: chizindikiro cha USB 2.0; kuti chithandizire kulowetsa kutsogolo ndi kumbuyo, pali mawiri awiri a zizindikiro kumbali ya socket; TX+/- ndi RX+/-: magulu awiri a zizindikiro, mawiri anayi a zizindikiro, zothandizira kulowetsa kutsogolo ndi kumbuyo; CC: chizindikiro chosinthira, kutsimikizira ndikuwongolera kulumikizana pakati pa gwero ndi terminal; SUB: chizindikiro chokulitsa, chingagwiritsidwe ntchito pomvera.

Ngati kutsekeka kwa mzere wosiyana wotetezedwa kumayendetsedwa pa 90Ω ± 5Ω, ndipo mzere wa coaxial ukugwiritsidwa ntchito, kubwerera kwa chizindikiro kumadutsa mu GND yotetezedwa. Pa mizere ya coaxial yokhala ndi mbali imodzi, kutsekeka kumayendetsedwa pa 45Ω ± 3Ω. Komabe, kusankha malo olumikizirana ndi kapangidwe ka chingwe kumadalira zochitika zogwiritsidwa ntchito komanso kutalika kwa zingwe zosiyanasiyana.

USB 3.2 Gen 1×1 - Kuthamanga kwa data kwa SuperSpeed, 5 Gbit/s (0.625 GB/s) pa msewu umodzi pogwiritsa ntchito 8b/10b encoding, mofanana ndi USB 3.1 Gen 1 ndi USB 3.0.
USB 3.2 Gen 1×2 - SuperSpeed+, data yatsopano ya 10 Gbit/s (1.25 GB/s) imathamanga m'njira ziwiri pogwiritsa ntchito 8b/10b encoding.
USB 3.2 Gen 2×1 - Kuthamanga kwa data ya SuperSpeed+, 10 Gbit/s (1.25 GB/s) pamzere umodzi pogwiritsa ntchito 128b/132b encoding, mofanana ndi USB 3.1 Gen 2.
USB 3.2 Gen 2×2 - SuperSpeed+, data yatsopano ya 20 Gbit/s (2.5 GB/s) imathamanga m'misewu iwiri pogwiritsa ntchito 128b/132b encoding.