175L7106 /176F2357
：（同號）/，
公司銷售的進口備件從國外生產(chǎn)廠家直接進貨，
實行扁平化的銷售模式，給客戶節(jié)約了時間和成本。
我們的目標就是國內(nèi)用戶采購國外備件遇到困難和疑難時都能找到我們。
我們能夠及時地報出優(yōu)惠的價格和迅捷的交貨期；國內(nèi)用戶采購國外備件受到*代理壟斷價格時，
我們會給用戶提供一個比較的機會，并且為客戶提供的解決方案。由于我們的訂單集中，訂貨量大，
因此我們能提供頗具競爭力的價格并能夠迅速交貨，我們*以來致力于解決國內(nèi)用戶采購國外備件中的疑難問題，
并為廣大用戶提供電氣及工控自動化成套設備的購銷、現(xiàn)場調(diào)試等全面周到的服務。
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背景簡介
本日USB裝置幾乎*，市面上充斥著各式各樣的USB閃存盤和各種USB外圍裝置，由于這些裝置大多是屬于 USB Slave，應用領175L7106 /176F2357域也就局限在PC市場。近來USB閃存盤的價格快速滑落，刺激出新的應用，如何在原有產(chǎn)品上使用USB閃存盤成為很多公司的難點。想要在8與16位微控制器中增加USB Host的功能，設計過程、本錢與功耗便成為了重要的考量因素。部份原因源自于這類系統(tǒng)使用的嵌進式控制器，目前尚缺乏適合的接口、資源、以及效率來連結(jié)USB Host控制器。
在此應用范例中，將以Vinculum VNC1L智能型USB Host橋接器IC做為一個例子，說明如作甚系統(tǒng)控制器PIC16F688增加一個USB 2.0全速連結(jié)埠。使這個系統(tǒng)能連結(jié)USB閃存盤，并能在耗用zui少的設計時間與資源下完成設計。
VNC1L簡介
VNC1L為Vinculum家族的*顆芯片。此智能型USB Host橋接器采用客制化的處理器，并搭配兩個加速數(shù)據(jù)傳輸?shù)闹苯觾?nèi)存存取(DMA)引擎及一個32位數(shù)值協(xié)同處理器，以達到zui高的文件操縱效率－且全部整合于一內(nèi)置64Kbyteflash、以及4Kbyte內(nèi)部數(shù)據(jù)SRAM的單一芯片中。
Vinculum家族鎖定嵌進式USB控制器市場，這類產(chǎn)品僅需少量外部支持組件。Vinculum家族核心的主要特點之一，就是其程序代碼長度明顯短于一般微控制器實現(xiàn)該功能代碼的長度，而降低核心程序代碼的資源后，將可使更多功能能得以收納至芯片內(nèi)部的e-Flash內(nèi)存中。VNC1L可處理整個USB協(xié)議并內(nèi)建12MHz 到48MHz 的時鐘。這些特性恰巧與PIC嵌進式系統(tǒng)形成互補。圖1為此系統(tǒng)之架構(gòu)說明，其利用VNC1L連結(jié)一個小型PIC16F688 微控制器及USB Type “A”連結(jié)器，進而可連接USB閃存盤。
設計說明
此PIC16F688為系統(tǒng)控制器，由其通用I/O引腳(9、10、11引腳上的 RC1、RC0、RA2) 來取得傳感器或其它) 提供了一個PIC的范例程序。在這個C范例程序中，PIC將等待USB閃存盤被偵測出，然后開啟一個名為hello.txt的檔案。“Hello World”字符串以及換行指令碼和line feed字符將被寫進文件，待封閉文件后，USB閃存盤便可移除。
結(jié)論
FTDI的Vinculum VNC1L是一個輕易使用、輕易設計的智能型USB Host橋接器，使得低本錢微控制器可輕易地增加USB 2.0低/全速的USB接口。在電源方面，Vinculum VNC1L 僅在USB接口增加少于10%的消耗。類似DOS的指令集，讓傳輸?shù)臄?shù)據(jù)能在微控制器環(huán)境中輕易進行編寫與除錯，伴隨著簡易的硬件周邊則大大地減輕工程師的負擔，為嵌進式系統(tǒng)提供一個USB主控端設計方案不再是件艱難的工作。這使得低本錢、高普及率的USB閃存盤能作為系統(tǒng)的儲存媒體，并能提供現(xiàn)場升級軟件之功能。在本文討論范圍外，值得附帶一提的是，除了高容量儲存裝置以外，VNC1L還能用來連結(jié)很多其它USB外圍裝置。
Ashcroft Gauge 0-100
Maska L-099X7/8 Half Coupling with L-099X3/4
Allen Bradley 800T-PB16 Illuminated Pushbutton Green Series T
Allen Bradley 800T-B Pushbutton Red Series T with 800T-XA Contact Block Series D
finder 34.51.7.024.001?0 Power Relay 24V 6A with finder 93.01.7.024 Relay Socket
finder 55.34.9.024.009?4 250V 7A Relay with finder 94.04 Relay Socket 300V 10A
Guardian 660-2C-120-A Solenoid Switch Coil
Balluff BKS-S49-1-PU-05 Cable Assembly
CAT 126-0110 Seal Group-Crank
Potter & Brumfield KHAU-17D11-24 Relay with Allen-Bradley 700-HN128 Relay Socket
Potter & Brumfield KHU-17A11-120 Relay with Allen-Bradley 700-HN128 Relay Socket
Omron H3YN-4 Timer Relay with Dayton 2A584F Relay Socket
Omron H3YN-4 Timer Relay with Omron PYF08A-E Relay Socket
Omron MY4N Relay 24 VDC with Dayton 2A584-M Relay Socket
Omron MY4N Relay 110/120 VAC with Dayton 2A584-M Relay Socket
Omron MY4N Relay with Dayton 2A584F Relay Socket
Omron MY2IN Relay with Dayton 2A584-M Relay Socket
Omron MY2IN Relay with Omron PYF08A-E Relay Socket
Omron MY4IN Relay with Dayton 2A584-M Relay Socket
Omron G3FD-X03SN-VD Solid State Relay 3A DC48V with PYF08A Relay Socket
Omron MY4N Relay 24 VDC with Dayton 2A584-F Relay Socket
Browning H3/4 Split Taper Bushing
Gould Shawmut TR200R Tri-onic Fuse Time Delay 250V 200A
Hubbell HBL2710 Twist-Lock Receptacle
Honeywell R7082C 1082 2 Temperature Control (Missing Cover)
Camozzi 138-955TF Valve
ITC TDAB-5MIN Time Delay Timer 120V 60 Hz (Face Bent on Edge)
Square D KT-1R9 Push-To-Test Pilot Light w/ Red Plastic Lens 120/110V 60/50Hz
Bussmann CHCC Fuse Holder 600V 30A 2P Double (Black Face)
Wilkerson Q02-95-965 Auto-Fill Lubricator Adapter Assembly
Hoffman Q-1PBPCDM Qline D1 PB Minature Enclosure
Schrader Bellows 1.06RPSR00.5 Pneumatic Cylinder
Turck BS 8146-0 Connector
Mitsubishi NF30-CS No Fuse Circuit Breaker 3A 500V 2P
Mitsubishi NF30-SS No Fuse Circuit Breaker 5A 600V 2P
emecanique XALB211 Pushbutton Station (Base Only)
Data Cable Connector (Lot of 5)
Roberts-Gordon 90707000 Air Filter
Turck VBRS 4.4-2PKG 3M-0.3/0.3 Eurofast Cord Splitter
Potter & Brumfield KRP11DG Relay 24VDC 8 Pin with Curtis RS8 Relay Socket
Power Sonic PS-1228 Sealed Rechargeable Battery 12V (Used)
Thomson Industries, INC. ISO 9000 Super Ball Bushing Bearing
Scientific Instrument 32 Sunshine Ground Detector
Square D QOB330 Circuit Breaker 240V 30A 3P (Faded/Discolor?ed Case)
Allen Bradley 1771-IBN C DC Input Module REV. D02 (Cracked Case)
Turck RK4.4T-10/S101/?CS10299 Flex Life Cordset
Turck RKC 4.4T-10/S90 Euro Fast Cordset
Greenfield 1-3/4 Threaded Hand Plug Tap
Ashcroft 595-06 Pressure Gauge 0-100 PSI (Used)
Potter & Brumfield KRPA11AN Relay 250V 10A 8 Pin with Curtis RS8 Relay Socket
Ashcroft 595-04 Pressure Gauge 0-30 PSI (Used)
Toledo 3/8" Pipe Die Large
Toledo 1/8" Pipe Die
Toledo 1/4" Pipe Die
emecanique PushButton Red Mushroom Head in enclosure
Marshalltown 89982 Solid Front Gauge 0-300PSI
ASCO 38-139-2 Solenoid Valve Coil
Ferraz Shawmut 60608J Fuse Block 60 Amps 3 Pole
GE CR123C163A (3) Overload Heater/Thermal Units
GE 81D106 (2) Overload Heater/Thermal Units
GE 81D110 (2) Overload Heaters/Thermal Units
GE 81D111 (2) Overload Heaters/Thermal Units
GE 81D113 (2) Overload Heaters/Thermal Units
GE 81D117 (2) Overload Heaters/Thermal Units
GE 81D118 (2) Overload Heaters/Thermal Units
GE 81D119 (2) Overload Heaters/Thermal Units
GE 81D120 (2) Overload Heaters/Thermal Units
GE 81D121 (2) Overload Heaters/Thermal Units
GE 81D122 (2) Overload Heaters/Thermal Units
GE 81D123 (2) Overload Heaters/Thermal Units
Square D 8501-GL Latch Attachment
GE CR123C048A (3) Overload Heaters/Thermal Units
Turck PKG3Z-2-PSG3 Pico Fast Cordset
Allen-Bradley 800EQ-NX4 Illuminated Flush Pushbutton White Series B
Gentex Corp. 7100 Photoelectric Smoke Alarm (New, Missing Wire Connector)
Turck CBC5-572-5M Cordset
Crydom A1202 Solid State Relay
Thomas & Betts Steel City 58 C 30 Utility Box Cover 4" X 2-1/8" (Box of 17)
Cleveland GH3 Plug Pulley Tap 1/4-20 NC
Besly Chicago .625 36NS PG HS T1 R7 Tap
WIX 42947 Air Filter
Simplex 0742299 3" Speaker Skirt Red (Box of 13)
Ideal 80-075M Commutator Resurfacer (NIB)
Siemens ED41B015 Sentron Molded Case Circuit Breaker 277V 15A 1P (NNB)
Square D FH36015 Circuit Breaker 600V 15A 3P
GTD 3/4-10 NC LH Die
GE 28F5336FC Dielektrol III Capacitor 2000 VPK 10 KHZ
Dayton 5ZC18 Relay 24 VDC 5A (NIB)
Power-One HB24-1.2-A International Series Power Supply
Browning H 3/4 Split Taper Bushing (NIB)
SMC D-Y7PV Pneumatic Auto Switch
GE 81D135 (2) Overload Heaters/Thermal Units
GE CR215GL10 Limit Switch Operator Lever
Omron G3FD-X03S Solid State Relay 3A 50 VDC With PYF08A Relay Socket
Clark Equipment 889312 Repair Kit
Raymond 860118 Forklift Knob (Qty. 2)
Raymond 860117 Forklift Knob (Qty. 2)
Raymond 790-704 Elbow Fitting (Qty 2)
Raymond 792-515 Elbow Fitting (Qty 2)
Micro Switch 3MN6 Snap Action Switch (NNB)
GE TCAL61 Circuit Breaker Lug
KKT Kraus EN 837-1 Oil Filled Gauge -1 to 9 bar
Big Chief, Inc. BC1518-4,A3B120 115 Heating Element
Epic H-BE-16 BS 500V 16A with IP 55 Enclosure
Edwards Transformer 120V 60Hz Thermal Protected Class 2
Automation Direct PMW-0P-2H Inductive Proximity Switch 10-30V DC Class 2
Dukane 110-2190 ecom Unit Door
Allen-Bradley 700-F400A20 Control Relay Series B
Omron G3FD-X03S Solid State Relay with PYF08A Relay Socket (Clip Missing)
Wilkerson LRP-95-698 Bowl/Guard Assembly
Daiichi PSK-80 Amp Meter 0-100
Johnson Controls G-2010-5 Pressure Gauge 0-30 PSI 0-200 KPA
Hubbell HBL2620 HBL Twist-Lock Receptacle 250V 30A
Siemens BL240 Circuit Breaker 40 A 240 V 2 P Type BL
Siemens BL215 Circuit Breaker 15 A 240 V 2 P Type BL
Buss 16021-2 Power Distribution Block 175 Amp 600 Volt
Siemens 3RU1116-0JB0 Thermal Overload Relay 0.75-1 Amp
Allen Bradley 140-L454 Bus Bar Link Commoning
Siemens 3RU1116-1HB0 Thermal Overload Relay 5.5-8 Amp
GE EP101ULD03 Circuit Breaker 277 Volt 10 kA Protector
GE EP101ULD16 Circuit Breaker 277 Volt 10 kA Protector
GE EP101ULD04 Circuit Breaker 277 Volt 10 kA Protector
GE EP101ULD04 Circuit Breaker 277 V 10000 A Protector
GE EP101ULC02 Circuit Breaker 277 Volt 10 kA Protector
Edison JDL 60 60Amp Fuse
Westinghouse MSH3.4A MS Starter Heater
Westinghouse MSH3.4A MS Starter Heater (NIB)
Siemens KUP-14D15-24V Gen Purp Relay 3 Amp 1/2 HP 600 V
P&B KUP-14D15-24V General Purp Relay 3 Amp 1/2 HP 600 V
P&B KHU-17A11N-120 120 Volt AC 3 Amp 28 Volt DC
Square D 9001KR1U Push Button 30mm Universal Colors
Allen Bradley 700-P600A1
Allen Bradley 700-P800A1
Gems Sensors FS-4 Flow Switch 44728 Used
MAC Valves PME111JB
Cleveland Punch & Die Company CPD F-2832 468 x 1.531 (NEW)
Cleveland Punch & Die Company CPD F-2831 15/32 x 1-1/32
Cleveland Punch & Die (NIB) FIG 740 2 1/32 x 1 - 1/32
Cleveland Punch & Die (NIB) CPD F-2831 15/32 x 1-1/32
MSD Inc. A425BXX 30 Amp 120V Coil 1 HP 120/240 VAC
Fusetron FRN-R 125 125 Amp fuse
Allen Bradley 140-MN-0063 Ser C Starter Manual Motor
BUSS Low-Peak Fuse LPS-RK-50SP
BUSSMAN REN 150 Super Lag 150Amp Fuse
GE CR120K240022AA Hi Fidelity Relay 115V Coil
Allen Bradley 700-F400A1 Contactor 9A 600V 120V Coil B
Allen Bradley 193-BSB12 Overload Relay 0.8-1.2 Amp
Ferraz Shawmut 67001 Power Distribution Block 600 Volt
Ferraz Shawmut USCC2I 30 Amp 600 Volt CC Fuse 2 Pole
GE 400T12/2P Printer Lamp 400 W 65 V T12 Bulb
Cleveland Punch & Die Company CPD F-2820 7/16x1
RAB QF150 Quartz Outdoor Flood Light Cast Aluminum
Allen Bradley 800T-A Black Button W/2 CB
Sursum V-EA53 Circuit Breaker G1A
Honeywell 316059A Yoke Assembly
idec RTE-B1AF20 Electronic Timer 0-3min
Graphic Controls Corp. Series 76 Disposable Pens Red
Graphic Controls Corp. Series 73 Red Disposable Pens
EMICO RF2 1/4C-2320 D.C. Milliamperes Meter 0-1
Bendix Dynapath AN6235-3A Hydraulic Filter (NIB)
Buss JTN60030 Double Fuse Block
Allen Bradley 193-BSA90 Overload Relay
Buss REN-150 Super-Lag Renewable Fuse 250VAC 150A
Gould Shawmut TR200R Tri-onic Fuse 250VAC 200A
Freelin-Wade A30924-01 6mm x 4mm x 100'
SFK 36177 Oil Seal
2012 Tapered Bushing
Walker Infloor Systems WD10W350-ECS Wiremold Wallduct
Hyster 1198292 Valve Seat
Allen Bradley 800E-2DL5 Full Voltage Module with Latch
Allen Bradley 800T-D Pushbutton Black W/ 800T-XD2
Allen Bradley 800T-D Pushbutton Red with 800T-XA
Allen Bradley 800T-D Pushbutton Red W/ 800T-XD2
Allen Bradley 800T-H2 Selector Switch with (2) 800T-XA Series D
Allen Bradley 800T-PA16 Illum Button Green W/ 800T-XA
Allen Bradley 800T-PA16 Illum Button Orange W/ 800T-XA
Allen Bradley 800T-PB16 Pushbutton Green W/ Transformer
Allen Bradley 800T-PRT16 Illum Button White W/ 800T-XA
Allen Bradley 800T-PT16 Button Red Bubble with X-208238
Allen Bradley 800T-PT16 Illum Pushbutton Red W/ 800T-XA
emecanique PO-12A Allied Control Relay
Allied Control PO-12A Relay
Allen Bradley 800EM-HM32C1 Maintained Selector Switch
Bimba 040.5-DUZ Air Cylinder
Allen Bradley 0A86P Operating Coil (NIB)
Square D 79432 Lever Arm CA-1
Square D 87912 Lever Arm CA-4
Square D 79423 Lever Arm BA-1
Allen Bradley Disconnect Switch
AdTran TRDDS-R Termination Unit 1291021L2
edi PB40 8747 Minibridge
edi PB40 8932 Minibridge
