Kev txhim kho keeb kwm ntawm USB interface
Sep 21, 2019| Shenzhen Shenchuang Hi-tech Electronics Co., Ltd (SChitec) yog lub tuam txhab ua haujlwm siab uas tshwj xeeb hauv xov tooj accessories ntau lawm thiab muag khoom. Peb cov khoom tseem ceeb muaj xws li kev mus ncig, chargers tsheb, USB cables, fais fab nyiaj hauv tuam txhab nyiaj thiab lwm yam khoom siv digital.Tag nrho cov khoom muaj kev nyab xeeb thiab txhim khu kev qha, nrog cov cim styles.products dhau daim ntawv pov thawj xws li CE, FCC, ROHS, UL, PSE, C-Tick, thiab lwm yam. , Yog tias koj txaus siab rau, koj tuaj yeem tiv tauj ceo@schitec.com ncaj qha.
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Kev txhim kho keeb kwm ntawm USB interface
USB interface USB 1.0
USB 1. Xyoo 1998 nws tau hloov kho rau USB 1.1, thiab qhov ceev tau nce mus rau 12Mb / s.
USB1.1 yog ib qho tseem ceeb USB specification. Nws hom high-ceev muaj kev sib kis tus nqi ntawm 12 Mbps, thiab qhov qis-ceev hom muaj kev sib kis tus nqi ntawm 1.5 Mbps (b yog lub ntsiab lus ntawm Bit). b / s feem ntau qhia qhov me ntsis kis tau tus mob ceev, thiab bps qhia me ntsis kis tus nqi. Tus lej sib npaug. B / s thiab b / s, BPS (bytes ib ob) thiab bps (ntsis ib ob) tsis tuaj yeem tsis meej pem. 1MB/s (megabytes/second)=8Mbps (megabits ib ob), 12Mbps=1.5MB/s, thiab MP3 feem ntau yog hom no. [3]
USB interface USB 2 0
Lub USB 2.0 specification hloov zuj zus los ntawm USB 1.1 specification. Nws kis tau tus nqi mus txog 480Mbps, uas txhais mus rau 60MB/s MB, uas yog txaus kom tau raws li qhov yuav tsum tau ceev ntawm feem ntau peripherals. Lub Enhanced Host Controller Interface (EHCI) hauv USB 2. Nws tuaj yeem tsav USB 1.1 li nrog USB 2.0 tsav tsheb. Hauv lwm lo lus, txhua yam khoom siv uas txhawb nqa USB 1.1 tuaj yeem siv ncaj qha rau ntawm USB 2.0 interface yam tsis muaj kev txhawj xeeb txog cov teeb meem kev sib raug zoo, thiab cov khoom siv xws li USB cables, plugs, thiab lwm yam tuaj yeem siv ncaj qha.
Qhov kev hloov pauv tau tshwm sim los ntawm kev siv USB rau cov ntawv thov lub tshuab luam ntawv yog qhov nce nrawm dua. USB interface muab kev sib txuas ceev ntawm 12 Mbps, uas yog 10 zaus siab dua qhov chaw nres nkoj sib npaug. Ntawm no ceev, cov ntaub ntawv hloov lub sij hawm yog heev txo. Tus txheej txheem USB 2.0 txuas ntxiv ua rau qhov nrawm nrawm mus rau 480 Mbps, uas yog 20 npaug sai dua li USB ceev, thiab txo lub sijhawm hloov pauv ntawm cov ntaub ntawv luam tawm.
USB interface USB 3.0
Lub USB 3.0 Pab Pawg Txhawb Nqa, uas suav nrog Intel, Microsoft, Hewlett-Packard, Texas Instruments, NEC, thiab ST-NXP, tshaj tawm tias USB 3 tiam tom ntej.0 tus qauv lub koom haum yog lub luag haujlwm rau tau ua tiav thiab tso tawm. Qhov theoretical ceev ntawm USB 3.0 yog 5. lub sijhawm ntawm USB 2.0. Lub cev txheej ntawm USB3.0 txais 8b / 10b encoding hom, yog li qhov theoretical ceev xam yog 4Gb / s, thiab qhov tseeb ceev raug txiav tawm ntawm cov txheej txheem nyiaj siv ua haujlwm, thiab muaj cov ntsiab lus tsawg dua ntawm 4Gb / s. Nws tuaj yeem siv dav hauv PC peripherals thiab cov khoom siv hluav taws xob.
USB 3. Cov tswj kev lag luam uas txhawb nqa cov lus qhia tshiab yuav tsum muaj nyob rau hauv ib nrab xyoo 2009, thiab cov neeg siv khoom lag luam twb muaj lawm.