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The internal components of a typical keydrive
This photograph shows both sides of the printed circuit board inside a typical keydrive (Seitec USB-BAR USB 1.1circa 2004), in this case an inexpensive 64 Mbyte USB2.0 device. The plastic clamshell case has been removed.
In practice the keydrive consists of only two significant components. The first is the flash memory part (item 4 in the diagram), a generic device that might as easily be found in a digital camera's memory card. The second (item 2 in the diagram) is a device which implements the USB networking and mass-storage interface, and which knows how to make a chunk of generic flash memory appear like a normal disk drive. The high degree of integration in this latter part makes small, inexpensive keydrives possible.
The parts of the device are as follows:
A male type-A USB connector.
An Ours Technology Inc. OTi-2168 USB 2.0 mass storage controller. This implements the USB 2.0 host controller, and provides a seamless linear interface to block-oriented serial flash devices, while hiding the complexities of block-orientation, block erasure, and wear balancing. It contains a small RISC microprocessor and a small amount of ROM and RAM. This communicates with the Hynix device over an 8-line unified address/data bus. This version is a 7x7mm 48-pin LQFP (Low Profile Quad Flat Pack) surface-mount device (info).
JP1 and JP2: two unpopulated 10-pin connectors, used for testing during the keydrive's manufacture.
A Hynix Semiconductor HY27USxx121M series NAND Flash memory device, featuring 4096 independently erasable blocks each providing 16 Kbytes of storage, yielding a total of 64 Mbytes of usable storage. The version used in this keydrive is a 20x12mm 48-pin TSOP1 (Thin Small Outline Package) surface-mount package (datasheet).
An SKC Shin Chang Electronics 12.000 MHz crystal oscillator (XTAL). The OTi device runs the output of this through a phase-locked loop to produce its main 12 MHz clock signal.
A single yellow light-emitting diode (run from a pin on the OTi device) which flashes to indicate activity.
A simple two-position switch, used to indicate whether the device should be in "write-protect" mode. It is shown here in the make position, indicating write-protect is off.
An unpopulated space for a second TSOP1 memory package. The OTi device is capable of driving up to eight such devices. Having this second space allows the manufacturer to choose (generally on a cost basis) whether to use one or two TSOP flash parts.
Surrounding these main components are a number of tiny surface-mount resistors (many of them serving as pull-ups) and capacitors.
For a closeup of an area of this keydrive, see this image.
Information and licensing
Photographs taken and annotated by John Fader in December 2004 using Adobe Photoshop and Inkscape. This image is (C) Copyright 2004 and (with the exception of its use under the GFDL) all rights are reserved.
Bu sənədi GNU Azad Sənədləşdirmə Lisenziyası, Versiya 1.2 və ya Azad Proqram Fondu tərəfindən nəşr olunan hər hansı sonrakı versiya şərtlərinə əsasən dəyişməz bölmələr, ön qapaq mətnləri və arxa qapaq mətnləri olmadan köçürmək, yayımlamaq və / və ya dəyişdirmək üçün icazə verilir; Lisenziyanın bir nüsxəsi GNU Azad Sənədləşdirmə Lisenziyası adlı hissəyə daxil edilmişdir.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue
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Originally uploaded by John Fader 17:59, 4 December 2004
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==The internal components of a typical keydrive== This photograph shows both sides of the printed circuit board inside a typical keydrive (circa 2004), in this case an inexpensive 64 Mbyte USB2.0 device. The plastic clamshell case has been remov
Bu faylda fotoaparat və ya skanerlə əlavə olunmuş məlumatlar var. Əgər fayl sonradan redaktə olunubsa, bəzi parametrlər bu şəkildə göstərilənlərdən fərqli ola bilər.
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Normal
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72 dpi
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72 dpi
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Adobe Photoshop 7.0
Faylın dəyişməsi tarixi və vaxtı
16:51, 4 dekabr 2004
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fayl, usbkey, internals, fayl, faylın, tarixçəsi, fayl, keçidləri, faylın, qlobal, istifadəsi, metaməlumatlarsınaq, göstərişi, ölçüsü, piksel, digər, ölçülər, piksel, piksel, piksel, faylın, orijinalı, 8206, piksel, fayl, həcmi, mime, növü, image, jpeg, fayl, . Fayl Faylin tarixcesi Fayl kecidleri Faylin qlobal istifadesi MetamelumatlarSinaq gosterisi olcusu 625 599 piksel Diger olculer 250 240 piksel 501 480 piksel 1 000 959 piksel Faylin orijinali 8206 1 000 959 piksel fayl hecmi 490 KB MIME novu image jpeg Bu fayl Vikimedia Commons dadirve diger layihelerde istifade edile biler Faylin tesvir sehifesine get The internal components of a typical keydrive This photograph shows both sides of the printed circuit board inside a typical keydrive Seitec USB BAR USB 1 1circa 2004 in this case an inexpensive 64 Mbyte USB2 0 device The plastic clamshell case has been removed In practice the keydrive consists of only two significant components The first is the flash memory part item 4 in the diagram a generic device that might as easily be found in a digital camera s memory card The second item 2 in the diagram is a device which implements the USB networking and mass storage interface and which knows how to make a chunk of generic flash memory appear like a normal disk drive The high degree of integration in this latter part makes small inexpensive keydrives possible The parts of the device are as follows A male type A USB connector An Ours Technology Inc OTi 2168 USB 2 0 mass storage controller This implements the USB 2 0 host controller and provides a seamless linear interface to block oriented serial flash devices while hiding the complexities of block orientation block erasure and wear balancing It contains a small RISC microprocessor and a small amount of ROM and RAM This communicates with the Hynix device over an 8 line unified address data bus This version is a 7x7mm 48 pin LQFP Low Profile Quad Flat Pack surface mount device info JP1 and JP2 two unpopulated 10 pin connectors used for testing during the keydrive s manufacture A Hynix Semiconductor HY27USxx121M series NAND Flash memory device featuring 4096 independently erasable blocks each providing 16 Kbytes of storage yielding a total of 64 Mbytes of usable storage The version used in this keydrive is a 20x12mm 48 pin TSOP1 Thin Small Outline Package surface mount package datasheet An SKC Shin Chang Electronics 12 000 MHz crystal oscillator XTAL The OTi device runs the output of this through a phase locked loop to produce its main 12 MHz clock signal A single yellow light emitting diode run from a pin on the OTi device which flashes to indicate activity A simple two position switch used to indicate whether the device should be in write protect mode It is shown here in the make position indicating write protect is off An unpopulated space for a second TSOP1 memory package The OTi device is capable of driving up to eight such devices Having this second space allows the manufacturer to choose generally on a cost basis whether to use one or two TSOP flash parts Surrounding these main components are a number of tiny surface mount resistors many of them serving as pull ups and capacitors For a closeup of an area of this keydrive see this image Information and licensing Photographs taken and annotated by John Fader in December 2004 using Adobe Photoshop and Inkscape This image is C Copyright 2004 and with the exception of its use under the GFDL all rights are reserved Bu senedi GNU Azad Senedlesdirme Lisenziyasi Versiya 1 2 ve ya Azad Proqram Fondu terefinden nesr olunan her hansi sonraki versiya sertlerine esasen deyismez bolmeler on qapaq metnleri ve arxa qapaq metnleri olmadan kocurmek yayimlamaq ve ve ya deyisdirmek ucun icaze verilir Lisenziyanin bir nusxesi GNU Azad Senedlesdirme Lisenziyasi adli hisseye daxil edilmisdir http www gnu org copyleft fdl html GFDL GNU Free Documentation License true true Bu fayl Creative Commons Attribution Share Alike 3 0 Sinqapur lisenziyasi altinda yayimlanir Azadsiniz paylasmaq eseri kocurmek paylamaq ve oturmek ucun remiks etmek eseri adaptasiya etmek Asagidaki sertlere riayet etmekle istinad Muvafiq kredit vermelisiniz lisenziyaya bir kecid vermelisiniz ve deyisikliklerin olub olmadigini bildirmelisiniz Bunu her hansi bir aglabatan sekilde ede bilersiniz ancaq lisenziyalasdiricinin sizi ve ya istifadenizi tesdiqlemesini teklif eden bir sekilde deyil benzer paylasma Eseri remix edirsinizse deyisdirirsinizse ve ya uzerinde is aparirsinizsa oz tohfelerinizi orijinalda oldugu kimi eyni ve ya uygun lisenziya altinda yayimlamalisiniz This licensing tag was added to this file as part of the GFDL licensing update http creativecommons org licenses by sa 3 0 CC BY SA 3 0 Creative Commons Attribution Share Alike 3 0 true true Originally uploaded by John Fader 17 59 4 December 2004CaptionsazerbaycancaAdd a one line explanation of what this file representsitalyan충전 기능 등등ㅌㅇItems portrayed in this filetesvir edircopyright status nbsp ingiliscopyrighted nbsp ingilislisenziyaGNU Free Documentation License version 1 2 or later nbsp ingilisCreative Commons Attribution ShareAlike 3 0 Unported nbsp ingilis Faylin tarixcesi Faylin evvelki versiyasini gormek ucun gun tarix bolmesindeki tarixlere klikleyin Tarix VaxtKicik sekilOlculerIstifadeciSerh indiki11 23 7 iyul 20081 000 959 490 KB Samulilibetter 13 43 5 aprel 20081 000 902 219 KB Talgraf777 Information Description Source Date Author Permission other versions 19 32 18 iyul 20051 000 959 490 KB Solipsist commonswiki The internal components of a typical keydrive This photograph shows both sides of the printed circuit board inside a typical keydrive circa 2004 in this case an inexpensive 64 Mbyte USB2 0 device The plastic clamshell case has been remov Fayl kecidleri Bu sekile olan kecidler USB fles kart Faylin qlobal istifadesi Bu fayl asagidaki vikilerde istifade olunur af wikipedia org layihesinde istifadesi USB flitsdryf ar wikipedia org layihesinde istifadesi سواقة الذاكرة الوميضية ba wikipedia org layihesinde istifadesi USB flesh һaҡlagys bg wikipedia org layihesinde istifadesi Flashka bn wikipedia org layihesinde istifadesi ইউএসব ফ ল য শ ড র ইভ bs wikipedia org layihesinde istifadesi USB memorija ca wikipedia org layihesinde istifadesi Memoria USB cs wikipedia org layihesinde istifadesi USB flash disk da wikipedia org layihesinde istifadesi USB nogle de wikipedia org layihesinde istifadesi Portal Elektrotechnik Bild des Monats el wikipedia org layihesinde istifadesi ReadyBoost Mnhmh USB en wikipedia org layihesinde istifadesi USB flash drive File talk Usbkey internals jpg User talk John Fader Wikipedia Picture of the day July 2005 Wikipedia Featured picture candidates May 2005 Wikipedia Featured picture candidates Usbkey internals jpg Wikipedia Wikipedia Signpost 2005 05 30 Features and admins Wikipedia Today s second feature July 2005 Wikipedia Picture of the day July 31 2005 Wikipedia POTD July 31 2005 Wikipedia Today s second feature July 31 2005 User Cyde Featured pictures User talk Deltabeignet Archive01 Talk Maxwell s equations Archive 2 Portal Electronics Selected picture Wikipedia Featured picture candidates delist 2007 Portal Electronics Selected picture 2 Wikipedia Featured picture candidates delist USB flash drive en wikibooks org layihesinde istifadesi A level Computing 2009 AQA Computer Components The Stored Program Concept and the Internet Hardware Devices Secondary storage devices A level Computing 2009 AQA Print version Unit 2 A level Computing AQA Computer Components The Stored Program Concept and the Internet Hardware Devices Secondary storage devices A level Computing AQA Print version Unit 2 A level Computing AQA Paper 2 External hardware devices Secondary storage devices es wikipedia org layihesinde istifadesi Memoria USB es wikibooks org layihesinde istifadesi Sistemas de Memoria Secundaria Pendrive et wikipedia org layihesinde istifadesi Malupulk eu wikipedia org layihesinde istifadesi USB memoria fa wikipedia org layihesinde istifadesi درگاه الکترونیک درگاه الکترونیک نگاره برگزیده درگاه الکترونیک نگاره برگزیده ۲ fi wikipedia org layihesinde istifadesi USB muisti fr wikipedia org layihesinde istifadesi Cle USB fr wikibooks org layihesinde 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