USB 3.2 Kev Tshawb Fawb Nrov (Ntu 2)

USB 3.2 Kev Tshawb Fawb Nrov (Ntu 2)

Hauv USB 3.2 cov lus qhia, qhov ceev ceev ntawm USB Hom-C tau siv tag nrho. USB Hom-C muaj ob txoj kev xa cov ntaub ntawv ceev ceev, hu ua (TX1+/TX1-, RX1+/RX1-) thiab (TX2+/TX2-, RX2+/RX2-). Yav dhau los, USB 3.1 tsuas yog siv ib txoj kev los xa cov ntaub ntawv, nrog rau lwm txoj kev muaj nyob ua qhov thaub qab. Hauv USB 3.2, ob txoj kev tuaj yeem qhib tau raws li qhov xwm txheej tsim nyog thiab ua tiav qhov ceev xa mus siab tshaj plaws ntawm 10 Gbps rau txhua txoj kev, ua rau tag nrho ntawm 20 Gbps. Nrog 128b/132b encoding, qhov ceev ntawm cov ntaub ntawv tiag tiag tuaj yeem ncav cuag kwv yees li 2500 MB/s, uas yog ob npaug ncaj qha piv rau USB 3.1 tam sim no. Nws tsim nyog sau tseg tias qhov kev hloov pauv channel hauv USB 3.2 yog qhov tsis muaj teeb meem kiag li thiab tsis xav tau kev ua haujlwm tshwj xeeb los ntawm tus neeg siv.

Txoj kev ua cov teeb liab thiab kev tiv thaiv ntawm USB3.1 cable yog sib xws nrog USB3.0. Kev tswj hwm impedance ntawm SDP shielded differential kab yog tswj ntawm 90Ω ± 5Ω, thiab ib-kawg coaxial kab yog tswj ntawm 45Ω ± 3Ω. Qhov qeeb sab hauv ntawm qhov sib txawv khub yog tsawg dua 15ps / m, thiab lwm qhov poob ntxig thiab lwm yam qhia yog sib xws nrog USB3.0. Cov qauv cable yog xaiv raws li daim ntawv thov scenario thiab kev ua haujlwm thiab pawg yuav tsum tau ua: VBUS: 4 xov hlau kom ntseeg tau tias qhov ntws ntawm voltage thiab tam sim no; Vconn: Txawv ntawm VBUS, nws tsuas yog muab qhov voltage ntau ntawm 3.0 ~ 5.5V; tsuas yog muab lub zog rau lub chip ntawm cable; D + / D-: USB 2.0 teeb liab; los txhawb kev ntxig rau pem hauv ntej thiab rov qab, muaj ob khub ntawm cov teeb liab ntawm sab qhov (socket); TX +/- thiab RX +/-: 2 pawg ntawm cov teeb liab, 4 khub ntawm cov teeb liab, txhawb kev ntxig rau pem hauv ntej thiab rov qab; CC: teeb liab teeb tsa, lees paub thiab tswj kev sib txuas ntawm qhov chaw thiab lub davhlau ya nyob twg; SUB: lub teeb liab ua haujlwm nthuav dav, siv tau rau lub suab.

Yog tias qhov impedance ntawm cov kab sib txawv uas muaj shielded raug tswj ntawm 90Ω ± 5Ω, thiab siv cov kab coaxial, qhov rov qab los ntawm lub teeb liab yog los ntawm GND uas muaj shielded. Rau cov kab coaxial ib leeg, qhov impedance raug tswj ntawm 45Ω ± 3Ω. Txawm li cas los xij, qhov kev xaiv ntawm cov ntsiab lus sib txuas thiab cov qauv cable nyob ntawm cov xwm txheej siv thiab qhov ntev ntawm cov cables sib txawv.

USB 3.2 Gen 1 × 1 - SuperSpeed, 5 Gbit / s (0.625 GB / s) cov ntaub ntawv xa mus rau 1 txoj kab siv 8b / 10b encoding, tib yam li USB 3.1 Gen 1 thiab USB 3.0.
USB 3.2 Gen 1 × 2 - SuperSpeed ​​+, tus nqi ntaub ntawv tshiab 10 Gbit / s (1.25 GB / s) dhau 2 txoj kab siv 8b / 10b encoding.
USB 3.2 Gen 2 × 1 - SuperSpeed ​​+, 10 Gbit / s (1.25 GB / s) cov ntaub ntawv tus nqi hla 1 txoj kab siv 128b / 132b encoding, tib yam li USB 3.1 Gen 2.
USB 3.2 Gen 2 × 2 - SuperSpeed ​​+, tus nqi ntaub ntawv tshiab 20 Gbit / s (2.5 GB / s) dhau 2 txoj kab siv 128b / 132b encoding.