描述

VMIVME-7750-466000

監(jiān)測系統(tǒng)時鐘，當發(fā)現(xiàn)系統(tǒng)時鐘停振時產(chǎn)生系統(tǒng)復位信號以恢復系統(tǒng)時鐘，是單片機提高系統(tǒng)可靠性的措施之一。而時鐘監(jiān)控有效與省電指令STOP是一對矛盾。只能使用其中之一。
看門狗技術(shù)是監(jiān)測應用程序中的一段定時中斷服務程序的運行狀況，當這段程序不工作時判斷為系統(tǒng)故障，從而產(chǎn)生系統(tǒng)復位。
低電壓復位技術(shù)是監(jiān)測單片機電源電壓，當電壓低于某一值時產(chǎn)生復位信號。由于單片機技術(shù)的發(fā)展，單片機本身對電源電壓范圍的要求越來越寬。電源電壓從當初的5V降至3.3V并繼續(xù)下降到2.7V、2.2V、1.8V。在是否使用低電壓復位功能時應根據(jù)具體應用情況權(quán)衡一下。EFT技術(shù)
新近推出的Motorola M68HC08 系列單片機采用EFT(Electrical Fast Transient)技術(shù)進一步提高了單片機的抗干擾能力。當振蕩電路的正弦波信號受到外界干擾時，其波形上會疊加一些毛刺。以施密特電路對其整形時，這種毛刺會成為觸發(fā)信號干擾正常的時鐘信號。交替使用施密特電路和RC濾波可以使這類毛刺不起作用，這就是EFT技術(shù)。隨著VLSI技術(shù)的不斷發(fā)展，電路內(nèi)部的抗干擾技術(shù)也在不斷發(fā)展之中。軟件方面的措施
單片機本身在指令設(shè)計上也有一些抗干擾的考慮。非法指令復位或非法指令中斷是當運行程序時遇到非法指令或非法尋址空間能產(chǎn)生復位或中斷。單片機應用系統(tǒng)程序是事先寫好的，不可能有非法指令或?qū)ぶ?。一定是系統(tǒng)受到干擾，CPU讀指令時出錯了。以上提到的是當前廣泛使用的單片機應該具有的內(nèi)部抗干擾措施。在選用單片機時，要檢查一下這些性能是否都有，以求設(shè)計出可靠性高的系統(tǒng)。
在應用軟件設(shè)計方面，設(shè)計者都有各自的經(jīng)驗。這里要提醒的是最后對不用的ROM要做處理。原則是萬一程序落到這里可以自恢復。用于單片機系統(tǒng)的干擾抑制元件

產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(fā)貨，
保?證售后服務質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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Tektronix P3420 Variable Output Pod

Agilent E4887A-102 HDMI Cable Emulator

Table Top RF Test Chamber

HP4947A Transmission Impairment Measuring Set

Tektronix MTS300 MPEG Test System w/op LV-AS

Tektronix DG2020A Data Generator

Tektronix DG2030 Data Generator

Sencore VG91 Universal Video Generator

Wandel And Goltermann ANT-20 Advanced Network Tester

Tektronix TLA 602 Logic Analyzer w/opt 4S

HP/Agilent 8643A Synthesized Signal Generator/opt 001

HP/Agilent 8568B Spectrum Analyzer

Agilent HP8643A Synthesized Signal Generator 1030Mhz

JFW 50BR-008 Benchtop Attenuator

TTC 30609 Framing Interface Adapter

HP/Agilent 3708A Noise and Interference Test set

Ranger Intelliscan 18-Zone Walk through Metal Detector

Agilent-HP 4275A Multi-Frequency LCR Meter opt-001,004

PTS Frequency Synthesizer 0.1-160MHz

Programmed Test Sources Frequency Synthesizer 1-500 MHz

Boonton 56218-S1 Dual Diode Power Sensor

Agilent HP8760A KE4 Dynamic Range Extender

HP 3708A Noise & Interference Test Set

Panasonic VP-8193A Signal Generator

Kikusui Electronics Corp. PLZ300W Electronic Load

Giga-tronics 80401A Power Sensor 0.01-18 GHz

Hewlett Packard 87104A SP4T Coaxial Switch

Agilent/Hewlett Packard 87104B SP4T Coaxiial Switch

VWR Scientific 1350F Oven

HP 54120A Digitizing O’scope and HP 54121A 4 Channel

Tektronix AM503 Current Probe Amp & A6303 Current Probe

Linear Positioner LS-612/06031 30mm Travel

Chuo Seiki LS-612 06031 Linear Positioner 30mm travel

Chuo Seiki Linear Positioner LS-912 06033 60mm

LS-912 06033 Linear Positioner/Prec?ision Slide

Chuo Seiki LS-912 06033 Linear Positioner 60MM travel

Hewlett Packard 778D Dual Directional Coupler

Amprobe AM-16 Multimeter

Agilent E4432B ESG-D Signal Generator 250kHz-3.0GHz

Anritsu SC6287 Demo Kit

VWR Scientific 1147 Refrigerated Bath Circulator

HP 2225A Injet Printer with HPIB Port

HP 1661C Logic Analyzer

Giga-tronics 80401A Power Sensor

Agilent/Hewlett Packard 8754A Network Analyzer

Bruel Type 2706 Power Amplifier

Hewlett Packard 8656B Signal Generator

Tektronix 7904A Oscilloscope

Agilent 6651A 400W DC Power Supply 0-8V 0-50A

HP 16047A Test Fixture

US G2 MainFrame w/6each G2R14 1×6 RF Relays

Tektronix P6022 Termination + AC Current Probe

Noise/Com MP2700-6 Multipath Fading Emulator

DowKey 5010 Cellular Receiver Test System

Agilent/HP E8285A CDMA Mobile Station Test Set

Agilent/Hewlett Packard 8904A Multifunction Synthesizer

Agilent/Hewlett Packard 54620A Logic Analyzer

Satimo SAT 2001 Probe Array Controller

Satimo SAT 2021 Active Measurement Test Unit

Satimo SAT 2013 RF Unit

Agilent/Hewlett Packard 778D Dual Directional Coupler

Meca 722N-20-3.100 Dual Directional Coupler

HP 8495A Programmable Attenuator /70dB

EXFO FIP-S15 Handheld Display w/P5 Inspection Probe

Tektronix 11403 Digitizing Oscilloscope

Magna Flux ZB-100 Black light

Federal Products Corp EAS-2350 N/A

Met One 200-1-115-2 Clean Room Monitor

Spectroline PR-125T UltraViolet Eprom Eraser

Xantrex Model XTS 120-0.5 M2 Power Supply

Kepco BOP 20-5M Bipolar OpAmp Supply

Xantrex XTS 120-0.5 GPIB M3 Power Supply

Xantrex XTS 60-1 GPIB Power Supply

Glassman Europe XM20-3MAA Programmable DC Power Supply

Sorensen XTS 7-6 M9B M13 Programmable DC Power Supply

SRT FPD-W Plus BGA Re-Work Station

Air-Vac DRS-22 Hot Air Re-work station

Tektronix P6015A 75Mhz High-Voltage Probe

Agilent/Hewlett Packard 8753B 6Ghz Network Analyzer

Radyne Comstream DM240 Digital Modulator

Tektronix TLA 704 Logic Analyzer

PMC 720 Series 10″ Dataplate Digital Hot Plate/Stirrer

Olympus NEO Splan 100 Objective

Olympus NEO SPlan 20 Objective

Olympus NEO SPlan 50 Objective

Mitutoyo QV 2.5x Objective

Mitutoyo QV 5x Objective

Trilithick BMA-580 Attenuator

Agilent 8761B SPDT RF Switch w/opt 000

Agilent/Hewlett Packard 8761B SPDT RF Switch

LeCroy CATC 5K Protocal Analyzer w/UWB Analyzer

Greenlee 299 9-Pin D-Subminiature Panel Punch

Greenlee RS232 25-Pin D-Subminiature Panel Punch

Greenlee 234 37-Pin D-Subminiature Panel Punch

Rohde and Schwarz FSP 3 Spectrum Analyzer

FOI-150 Fiber Optic Light Source w/ring light

HP 8762A Coaxial Switch

Agilent/HP 8762B Coaxial Switch

WSI 19 inch Single Bay Mobile Test Rack

Continental – Superterm 8 Intelligent Controller

Agilent Triple Output DC Power Supply E3631A

Agilent E3631A Triple Out put DC Power Supply

Kepco BOP 20-5M Power Supply/Amplifie?r

HP 8494G Programmable Attenuator 11dB

HP 8496G 110 dB Attenuator

Bransononic 3510 Table Top Ultrasonic Cleaner

Agilent 8763B Coaxial Switch

Standard SCM550HP NTSC TV Modulator

Tektronix P6137 Passive Voltage Probe for 2400 Series

Blonder Tongue oc16 Passive Combiner

HP 11636A Power Divider, DC to 18 GHz

Miyachi Unitek TCW/1-196-03 Thermocouple Welder-TCW

Miyachi Unitek DC25 Welding Control w/No. 80 Weld Head

Narda 3020A Bi-Directional Coaxial Coupler

Narda 4226-20 Directional Coupler

Narda 4226-10 Directional Coupler

ROD-L M25 Ground Continuity Tester

Ophir 4003F RF Power Amplifier

Agilent/Hewlett Packard 87130A Attenuator/Swit?ch Driver

M/A-Com MPD EWAL 4010-12 Solid State Amplifier 80W

Stereo Zoom 4 Microscope B&L

Stereo Zoom 4 Microscope 0.7x-3.0x Bausch&Lomb

Bausch & Lomb Stereo Zoom 4 Microscope

Bausch and Lomb Stereo Zoom 4 Microscope

Agilent 33120A 15MHz Waveform Generator

Agilent/Hewlett Packard 34401A 6 1/2 Digit Multimeter

Quadchek II 7564SA Electrical Safety Analyzer

California Instruments 5001 i 5KvA AC Power Source

Hewlett Packard 3588A Spectrum Analyzer

100 Watt Attenuator SA3N100-30F 30db 3Ghz

SA3N100-30F 100 Watt Attenuator

S.M. Electronics SA3N100-30F 100 Watt Attenuator

Agilent VXI Mainframe E8403A w/6 modules

Agilent/Hewlett Packard 773D Directional Coupler

Agilent 89611 VSA / E8403A VXI Mainframe

Agilent N5102A Digital Signal Interface Module

Sigma II Sigma Memory Tester w/ memory adapter

Sigma II Sigma Memory Tester w/Sparc 5/10 adapter

DSI Sigma II Sigma Memory Tester

Agilent N5102A Interface Module

Agilent N5102A Base Band Digital Interface Module

HP 70001A Mainframe w/8 HP 70100A modules

Sanjole Wavejudge 4800 Wireless Test System

Granville-Phill?ips356 Micro-Ion Plus Vacuum Gauge

Hewlett Packard 8753D Network Analyzer w/OPT 011

Kikusui TOS 8650 Withstanding Voltage Tester

Agilent/Hewlett Packard 438A Power Meter

California Instruments 5001ix-400 AC Power Source

Audio Precissioin SYS-2522A System Two Cascade

Sorensen SGA60X250D-0AAA Power Supply

Tektronix 2246A 100 MHz Oscilloscope

Tektronix TDS 320 100MHz 2 Channel Digital Oscilloscope

Tektronix 2465 300 MHz Oscilloscope

Agilent/Hewlett Packard 3588A Spectrum Analyzer

Mei Ker Enterprise co. MK-830 Semi-Auto Winding Machine

Weller WD1M Rework power Unit w/DXV80 Desoldering iron

Weller WDD81V Multi-Function Desoldering Station

Sorensen SGI 60/250 Power Supply

Agilent/Hewlett Packard 437B Power Meter

Hewlett Packard 16034E Test Fixture

Hewlett Packard 16044A Test Fixture

Sorensen HPD 60-5 SM5A Power Supply

Kikusui Electronics Corp. DPO 2212 GP-IB Programmer

Kikusui Electronics Corp. DPO 2212A GP-IB Programmer

Agilent/Hewlett Packard 8494H Attenuator 11dB

Agilent/Hewlett Packard N4000A Noise Source

Chroma 6203-15MRAM2 Programmable DC Power Supply

Xantrex XTR8-100MEA Programmable DC Power Supply

Sorensen XTS 15-4 M9B Programmable DC Power Supply

Xantrex HPD 60-5 GPIB M2 Power Supply

Xantrex XTS 20-3 GPIB M3 Power Supply

Ameritec CRS-D 1.544M Digital Call Generator

Hewlett Packard 37732A Telecom/Datacom Analyzer

ICOM PS-80 Base Station Power Supply

Hewlett Packard 85033D 3.5 mm Calibration Kit

Xantrex XTS 7-6 M5A Power Supply

Q-Corp Lead-O-Matic II Mass Lead Trimmer

Opto Power Diode Laser System OPC-C005-810-FC?PS 30w

Marconi Instruments 2022D Signal Generator

Agilent/Hewlett Packard 11666A Reflectometer Bridge

Kikusui PAN 70-8A Power Supply

Inficon 751-001-G1 XTC

Unique Equipment Corp. LAB-KLEEN Ultrasonic Cleaner

Agilent 85098C 7-16 Electronic Calibration Kit

Agilent/Hewlett Packard 85093A 3.5 mm Calibration Kit

Agilent/Hewlett Packard 85054D Type N Calibration kit

Xantrex XPR 60-100 HV Programmable DC Power Supply

Sorensen SLM-4 Four-Bay Chassis with 4 Modular Loads

Sorensen XTS 20-3 M9B M13 Programmable DC Power Supply

Data I/O 2900 Programming System

DSI Sigma II Sigma Memory Tester

Weinschel Corp AF117A-69-34 Attenuator

Data I/O 2900 Programming System P/N 901-0067-004

PTT 5200 ISDN/DDS Cable Simulator

Tektronix 3001GPX Logic Analyzer

Xantrex XPR 40-150 HV Programmable DC Power Supply

Sorensen SLM-4 Four-Bay Chassis with 3 Modular Loads

Sorensen SLM-4 Four-Bay Chassis w/2 DC Modules /2 Loads

Gramatech GVS2100R Vacuum Sealer

Will’tek M248348 RF Shield Box

ITT CANNON DM53744-25 (251)Contact,So?cket,Gold plated

Olympus BH-2 Trinocular Microscope

Amphenol Aerospace MS3102A24-10P 10 Circular Connectors

Amphenol Aerospace MS3102A18-4S 185 Circular connectors

Meiji Trinocular Microscope with Boom Stand

Scienscope Microscope,Boom Stand,Fiber Optic Ring Light

Scienscope Microscope/ Boom Stand,Fiber Optic,RingLight

Boonton 56218-S1 Power Sensor

Boonton 56518 Power Sensor

FAIRCHILD FQA55N25 MOSFET N-Channel

ICT 22CV10AJ CMOS Programmable Logic Device

Xantrex XDL 35-5T DC Power Supply

Unox XAF195 Oven

Agilent/Hewlett Packard 6624A System DC Power Supply

Xantrex XBT32-3FTP DC Power Supply

Digi DC-120 Scale

ARRA 3428A Broadband Phase Shifter

Branson 2000iw Welder

Aeromotive EDG System Ergomation Work Bench

Vision Engineering Cobra Microscope

Agilent E4426B ESG-AP Signal Generator 250 kHz-4.0 GHz

Agilent 3499B Switch/Control System

Rohde FSIQ7 Signal Analyzer 20Hz to 7GHz

Kenwood SG-5150 Signal Generators

Kenwood VA-2230A Signal Analyzer

Panasonic VP 8130A AM-FM STEREO SIGNAL GENERATOR

Agilent/HP 6237B Triple Output Power Supply

Kenwood FL 180A Wow Flutter Meter

Agilent/Hewlett Packard 3478A Multimeter

Narda 769-20 High Power Attenuator

Illinois Instruments 913 Oxygen Analyzer

TRILITHIC BMA-35110B-SMA Benchtop Variable Attenuator

HP Agilent 6060A System DC Electronic Load

TAS 4600A Noise and Interference Emulator

RDL MTG-2000 Multi-Tone Generator

RDL IMD-801D-03A Intermodulation Simulator

BASF Gold 2400′ Tapes/Seals

Thermonics T-2050 Precision Temperature System

3M 980 Ionized Air Gun

Hughes Wr15 Precision Direct Reading Attenuator 0-50db

Boonton 95600005A Power Sensor Cable 5 ft.

Boonton Electronics 95600005A Power Sensor Cable 5 ft.

World Equipment Source 19″ Dual Bay Test Equipment Rack

Agilent/HP 5316B Universal Counter

Agilent/HP 6632B System DC Power Supply

Agilent/HP 6227B Dual DC Power Supply

DEK ProFlow Direkt Imaging Head

Weigh-Tronix 3275 Scale

Burst C 066M Radial Lead Trimmer

Rohde & Schwarz SMY02 Signal Generator

Rohde NRV-Z5 Diode Power Sensor

Agilent/HP E3610A DC Power Supply

Ingersoll-Rand ESCB50 DC Power Supply

Sorensen DCS 60-18 Power Supply

Sorensen LT 18-5 DC Power Supply

Desco 60500 Charge Buster High Output Ionizer

Leader 718-10D Regulated DC Power Supply

HP 6632A System DC Power Supply

Ellisys Wireless USB Explorer 300 Protocol Analyzer

Xantrex XMP 2600 Power Supply

Sorensen DCS33-36EM9C Power Supply

TAS 4500 FLEX RF Channel Emulator

Giga-tronics 6062A Synthesized RF Signal Generator

Inet Spectra Multi-protocol analyzer

HP J2300C Internet Advisor

Ameritec AM2-De Digital Bulk Call Generator

Charleswater 19500 Auto-Set Ion Pump

BGA & CSP Rework System

Boonton Electronics 51071 Power Sensor 10MHz-26.5GHz

Advantest R6441A Digital Multimeter

HP 41800A Active Probe

Rohde FSEA Spectrum Analyzer

Tyco Electronics / Kilovac EV200A1ANA Relay

Hakko 850D SMD Rework Station

Hakko 850M-V12 SMD Rework Station w/air blower

Air-Vac DRS25 SMT Lead Free Rework Station

Branson 2000aed-2.5 Ultrasonic Welder (30 KHz, 1500W)

Kenwood AG-203D Oscillator

Nikon OPTIPHOT Microscope w/light

Rohde and Schwarz SMY02 Signal Generator

Panasonic VP-7723A Audio Analyzer

Schott-Fostec ACE Fiber Optic Light Source

Pace SODRTEK ST450 Preheater

California Instruments 1251RP Power Supply