iLAB I
USB 3.0
Dqc td mai vai khd nang mang Iqi toe do tang len gap 10 Idn.
USB ia mgt trong nhung cong nghe gian don den mdc l<inh ngae (chi it dd la quan diem cua nhifng nguoi sir dung binh thuong), co do ben bi cao, va hien dien d khip moi noi.
Cong nghe nay d§ su dung den mifc ia hiem thay ai trong so chung ta phai suy nghi mil m dung Chung, va chung ta cung Ithdng can phai phan van ring lieu chung co boat dgng nhu chung hifa hen hay ithong bdi hau nhu iuc nao chung cung the hien dung nhu nhifng gi chiing co the.
T
hat khdng the tddngtugng ndi viec stt dung may tinh - hay hau het nhdng thiet bj dien t d gia dung ngay nay - ma lal khdng dung den cdng nghe USB nay chi it la mdt lan trong ngay.
Tuy nhien, dd'i vdi mdt cdng nghe vdn da qua phd bien, thi viec tie'p tuc sang tao lai oang trd nen quan trgng han. Nguoi su dung cGng b i t d i u nhan t h i y d USB nhdng diem tieu cue neu nd khdng the thich dng ddgc vdi nhdng thiet bj ngay nay
cung nhtt khdng the truyen tai dQ lieu theo dung each ma chung ta mudn chung nhtt vay.
That khdng may ngae nhien khi nhttng ngddi phat trien cdng nghe USB dang tien hanh nghien cdu, tao ra nhttng stt thay ddi can thiet cho
Minh hoa chudn A 3.0
Cac chan cdm d fren hdng fren (USB 3.0 portion), fu trai sang phdi: chan fruyen, chan fruyen, chdn h-ung hoa, chan nhgn, vd chan nhgn.
Nhung chan cdm d hdng duoi, h> trdi sang phdi:
ndi da't, truyen/nhgn d i j lieu, truyen/nhqn dO lieu (hogt dong nhu mgt do! vol nguyen ly h-uyen/nhgn mot chieu toi mot fhdi diem), vd chan nqudn.
Minh hoa chudn B 3.0
Powered B. Dau noi USB 3.0 Powered B c6 bao gom them cac chan cam nguon va noi dat so vdi
dau noi USB 3.0 chuan B. Cac chan c5m nay se cung cap dien nanj
Powered 3.0 co the nhqn cac dau cam.chudn B 2.0 va 3.0. Cac bo dieu hgp khong day cung thu USB Powered B.
Micro Family. Voi. cac dau noi USB 3.0 chudn Micro-A, -B va - A B thi c6 mot phan phy tach biet i ke cua cong nghe USB 2.0 va iheo do, se'co them cac chan cdm phy. Phdn phy nay se cho phep chudn Micro 3.0 co the tuang thich ngugc voi cac ddu ndi chudn Micro 2.0. Cac thiet bi cdm toy miet bi ma tren do chung ta co the nhqn thdy su ung dyng cong nghe USB v6i cac dau noi chudn -AB. (Micro-A va -AB chi co doi chut khac biet so voi chudn Micro-B ma thoi).
cac dau noi chinh la nhui
5 0 l lin hoc 8, deri song 14,9,2009
nhdng tinh nang cua USB trudc khi chung den dttgc tay ngudi tieu dung.
Sd xuat hien gan day cua nhttng thdng sdve USB 3.0, cung nhd trdng chd sd xuat hien cua phan cttng cung cac thie't bj USB 3.0 vao nam 2010 cd the dam bao ring USB se cdn ddng mdt vai trd khdng nhd trong ITnh vdc tin hgc cung nhu nhttng trai nghiem ddi vdi nhttng thie't bj dien ttt dan dung.
10 lan nhanh hon
USB 3.0 - SuperSpeed USB, se cd tdc do truyen dd lieu len tdi 4,8 Gbps, gap 10 lan so vdi USB 2.0, con dugc ggi la Hi-speed USB. Cung luc dd, nhttng thiet bj stt dung cdng nghe USB 3.0, cac chuan ket nd'i, cac d cim cung nhd cac diu cim se cd kha nang tuong thich ngdgc vgi cdng nghe USB 2.0, ddn gian hda qua trinh chuyen glao eua ngudi sd dung cang nhieu oang tdt.
Jeff Ravencraft - Giam dd'c, Chu tjch diin dan USB Implementers Forum, ngttdi hien cung dang cdng tac tai Intel da ndi: "Mgi sd chuyen glao deu khdng the nao trgn ven dugc". Ong nay cdn cho ring: "Stt chuyin glao nay, cung nhu each ma chung ta dang stt dung cac cap nd'i du sao cung phai la each td't nhat.
Sd dung diu cim loai mdl hay leal cu hay ca hai leal cung deu phai heat ddng".
Kien true 3.0 mdl se them 5 chan cim nda so vdi kie'n true cua chuan
2.0, tang tdng sd chan d mdi dau lien ket len con sd 9. Trong sd 5 chan cim mdl nay thi 2 chan cd nhiem vu truyen dd lieu, 2 chan ntta cd nhiem vu nhan dd lieu. Bdi chung la nhttng Chan ndi chuyen biet nen cac thiet bj sd dung cdng nghe USB 3.0 gid day se cd the gtti va nhan dtt lieu mdt each ddng thdi, khdng gidng nhu d cac thief bj chuan 2.0, chi cd the truyen dtt lieu di theo mdt chieu tai mdt thdi diem nhat djnh.
Quan ly dien nang
Viec quan ly dien nang cung la mdt nghien cttu chu yeu khi phat trien USB 3.0, dng Ravencraft ndi.
Vdi viec ngay cang cd nhieu han nhdng thie't bj gia dung bd tui sac dien qua ket ndi USB, thi tinh nang ky thuat cua USB 3,0 se cd the cung cap dien nang len tdi 900 mill-ampe danh cho nhdng thief bi cau hinh (configured devices) va 150 mill- ampe ddi vOI nhdng thief bj treo (unconfigured / suspended devices), tang kha nang sac dien ttt 50 len 80% so vdi trddc day,
Viec bao toan dien nang la mdt stt can nhic quan trgng, vi cdng nghe USB dugc ttng dung rat phd bie'n tren nhttng thief bj stt dung pin. Viec stt dung USB khdng the bien thanh mdt tac nhan tieu thu dien nang cua cac thief bj bd tui mdt each qua dang dugc.
USB 2.0 sd dung mdt kien true kiem seat vdng thie't bj, "khi cac thief
bj dugc ket ndi vao mdt thief bj nao dd thi thiel bj dd se tham dd cac thiet bj va hdi xem lieu chung cd dang luu thdng dtt lieu hay khdng", Ravencraft ndi. "Thiet bj se tiep tuc hdi, va dd la mdt sd sd dung dien nang khdng hieu qua".
Trong khi dd, USB 3,0 stt dung kie'n true dieu khien bang ngit, "khi thief bj chinh yeu ciu cac thie't bj bit diu luu thdng dd lieu", Ravencraft ndi. "Thi chung se ndi rang <Ddng ggi trd khi ban cd luu thdng dd lleu>.
Ke't nd'i va thie't bi se cd the chuyen sang trang thai tieu thu ft dien nang hoac tam ngdng hoat ddng".
Dau ndi mdi - Day cap mdi
Ben canh yeu ciu rang cac dau nd'i chuan 3.0 cin phai nhan dugc lgi ich ve too do mdt each tdi da thi ngddi sd dung cung can phai cd day cap theo dung chuan USB 3.0.
"That d i dang cho ngddi sd dung neu mudn cd tdc do nhanh hdn gap 10 lin so vdi Hi-Speed USB hien nay", Ravencraft ndi. Day qua thtte la mdt odng nghe tuyet vdi bdi tinh nang plug-and-play. Cung vdi stt de dang stt dung cung nhu tinh dan gian nhd vay ma ngddi tieu dung bie't ddgc ring hg se chl can cam thiet bj vao va Chung se hoat ddng trdn tru".
Va gid day hg se cdn biet rang hg cdn cd the tal dttgc nhttng tap tin khdng Id chi trong mgt khoang ngin thdi gian. Stt xuat hien cua USB 3.0 se cdn khien USB trd thanh mdt
14.9,2009 lin hoc 8, doi , i51
ILAB I
trong nhdng cdng nghe tdt nhat va gian dan nhat ddgc dng dung trong vai nam tdi.
Cac dau ndi USD 3.0
USB 3,0 (SuperSpeed) cd the tddng thich ngdgc vdi chuan USB 2,0. Cac diu ndi se ch? cd ddi chut khac biet d ve ngoai ma thdi. Bang each khdng thay ddi qua nhieu hinh dang cua chung, kha nang tudng thich ngdgc la rat khi thi. Tuy nhien, oac diu ndi USB 3.0 lal cd tdi 5 chan cim mdl, cho phep cai thien td'c dd cung nhd quan ly dien nang.
"Khi chuyen ttt USB 1.1 sang USB 2.0, chung tdi da sd dung cung cap nd'i cung nhd d i u ndi", Jeff Ravencraft ndi. "Vdi SuperSpeed, chung tdi da tang them 5 chan cim ntta".
Bay la mdt sd stt khac biet gitta mdl loai dau ndi USB khi chuyen td chuan 2.0 sang chuan 3.0.
Chuan A. Sau ndi USB 3,0 chuan A stt dung hinh dang ve co ban la gidng vdi diu ndi USB 2.0 chuan A, cho phep kha nang tttdng thich gitta cac thie't bj. Trong diu ndi chuan A trong hinh anh dudi day, ban cd the
nhin thay 5 chan cam mdl danh cho chuan USB 3.0, dugc khoanh trdn c hinh ben phai. Rat nhieu thie't b| di§f dan dung se stt dung cdng nghe USB chuan A nay.
Chuan B. Vdi diu ndi USB 3.C chuan B, cac chan cam mdi se li phan phia tren cua dau ndi, khai biet so vdi dau ndi USB 2.0 chuan vin thay. Khe cam danh cho chua nay cd the nhan dddc nhdng dai cim USB 2.0 chuan B. Chuan USB 3.0 se la sd Ida chgn ly tttdti!
cho nhdng thiet bj ngoai vl, nhtt mi In ching h a n . ^
5 2 l lin hoc 8. doi song 14,9,2009
Kien true kenh truyen kep '
Kien true kenh truyen cua USB 3.0
(SuperSpeed) la kien true kenh truyen kep, cho phep cong nghe nay co the ddng thoi chay ca USB 2.0. USB 2.0 va USB 3.0 la hoan toon tuong thich voi nhau, ca ve mat du lieu Idn ket
Trong vi dy 6 hinh minh hga tren ve kien true cua cong nghe USB 3.0, tdt ca cac thiet bi dugc ket noi deu la cae thiet bi SuperSpeed:
Thiet bl ehu (host), thiet bi trung tam (hub) cung thiet bi ngogi vi (thanh phdn 3.0 cua kien true tung thiet bi deu dugc to mau xam). Mdi thiet bi deu CO hd trg cd USB 2.0 ldn USB 3.0.
Vl moi thief bi 6 day deu su' dyng cong nghe SuperSpeed nen khong co thiet bi nao khong tuong thich ngugc voi kien true 2.0 ea, vo tdt nhien la chung cung c6 the hoot dong het cong
Super Speed
Non-SuperSpeed High-
Speed Full- Speed
Low- Speed
1
1
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1 1NoivStiMrSpQod (USB 2.0) ' CompositB Cable USB 3.0 Hub
USB 3.0 Peripheral Device
"uy nhien, neu mgt thiet bi ngogi vi su dyng :6ng nghe 2.0 dugc ket ndi vao thay vt mgt hiet bi ngogi vi su- dyng cong nghe 3.0 ehdng iqn, thi ke noi giCra thiet bi trung tam (hub) voi hiet bi ngogi vi do se phdi hogt dgng voi tdc
]o CUO cong nghe USB 2.0, dong thdi su dung kien true eua cong nghe ndy. Thiet bi trung tdm SuperSpeed se jhdi gidm bdt tde do truyen tdi xudng de phu hop vdi tdc dd cua thiet bi ngoai vi sii dung edng nghe USB 2.0 uong ung. Tuy nhien, ket ndi giua thiet bi chu SuperSpeed vd thiet bi trung tdm SuperSpeed se vdn hoot ddng 'di tdc do eua edng nghe 3.0.
/i thiet bi trung tdm vd thiet bi chu SuperSpeed deu su dung kien true kenh truyen kep nen chung cd the gidm dc do truyen tdi xudng mot cdch de ddng khi edn thiet. Khi ed mdt thiet bi su dyng cdng nghe 2.0 dugc ket ldi tdi thiet bi trung tdm SuperSpeed, ket ndi se truyen theo cdc (hdnh phdn dp dung cdng nghe USB 2,0 nhung phdn cd mdu trdng trong hinh tren).
Cap noi USB 3|
Ddy cdp ndi cua cong nghe USB 3.0 yeu cdu can co mot ddy SDP (Shielded Differential Pair), cung vol mot ddy UDT (Unshielded Tv/isted Pair - Doi day xodn khong boc| vdn vdn thdy d cong nghe USB 2,0. SDP se mang lal tinh todn ven cho tin hieu vd khd nang chong EMI (Electromagnetic Interference - N h i l u cdm ung dien td) cung cdn thief de SuperSpeed USB co the hogt dgng hieu qud, Phdn UDP ciia ddy cdp giup mang Igi khd nang tuong thich vdi cong nghe USB 2,0 dl truoc.
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W.i Ji
14.9.2009 lin hoc 8, Joi long |53
