In the early days, embedded systems were built primarily by engineers in a pretty exclusive club. Embedded devices and software tools were expensive, and building a functional prototype required significant software engineering and electrical engineering experience.
标签: Arduino Gadgets Make Bots and
上传时间: 2020-06-09
上传用户:shancjb
1. Scope ......................................................................................................................................................................... 12. DDR4 SDRAM Package Pinout and Addressing ....................................................................................................... 22.1 DDR4 SDRAM Row for X4,X8 and X16 ................................................................................................................22.2 DDR4 SDRAM Ball Pitch........................................................................................................................................22.3 DDR4 SDRAM Columns for X4,X8 and X16 ..........................................................................................................22.4 DDR4 SDRAM X4/8 Ballout using MO-207......................................................................................................... 22.5 DDR4 SDRAM X16 Ballout using MO-207.............................................................................................................32.6 Pinout Description ..................................................................................................................................................52.7 DDR4 SDRAM Addressing.....................................................................................................................................73. Functional Description ...............................................................................................................................................83.1 Simplified State Diagram ....................................................................................................................................83.2 Basic Functionality..................................................................................................................................................93.3 RESET and Initialization Procedure .....................................................................................................................103.3.1 Power-up Initialization Sequence .............................................................................................................103.3.2 Reset Initialization with Stable Power ......................................................................................................113.4 Register Definition ................................................................................................................................................123.4.1 Programming the mode registers .............................................................................................................123.5 Mode Register ......................................................................................................................................................134. DDR4 SDRAM Command Description and Operation ............................................................................................. 244.1 Command Truth Table ..........................................................................................................................................244.2 CKE Truth Table ...................................................................................................................................................254.3 Burst Length, Type and Order ..............................................................................................................................264.3.1 BL8 Burst order with CRC Enabled .........................................................................................................264.4 DLL-off Mode & DLL on/off Switching procedure ................................................................................................274.4.1 DLL on/off switching procedure ...............................................................................................................274.4.2 DLL “on” to DLL “off” Procedure ..............................................................................................................274.4.3 DLL “off” to DLL “on” Procedure ..............................................................................................................284.5 DLL-off Mode........................................................................................................................................................294.6 Input Clock Frequency Change ............................................................................................................................304.7 Write Leveling.......................................................................................................................................................314.7.1 DRAM setting for write leveling & DRAM termination function in that mode ............................................324.7.2 Procedure Description .............................................................................................................................334.7.3 Write Leveling Mode Exit .........................................................................................................................34
标签: DDR4
上传时间: 2022-01-09
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PW4203 is a 4.5-22V input, 2A multi-cell synchronous Buck Li-Ion battery charger, suitable forportable application. Select pin is convenient for multi-cell charging. 800 kHz synchronous buckregulator integrates of 22V rating FETs with ultra low on- resistance to achieve high efficiency andsimple circuit design.The PW4203 is available in an 8-pin SOP package, provides a very compact system solution andgood thermal conductance
标签: pw4203
上传时间: 2022-02-11
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基于药物治疗在临床治疗中的重要性,分析目前服药提醒装置存在的不足,以STM32F103VET6单片机为控制核心,设计了一种多功能电子药箱。该系统包括显示模块、语音模块和数据存储模块。显示模块通过触摸屏电路和LED指示灯电路,与语音模块相配合,实现了服药提醒及指导的功能;数据存储模块通过EEPROM存储电路,能够实现掉电时服药信息不丢失的功能。并且为了实现电子药箱的智能化控制,开发了手机APP,两者之间可通过WIFI进行数据通信。经测试,该药箱能够有效地帮助慢性病患者按时、定量、正确服用药物,适合在家庭中推广使用,具有较高的应用价值和实践意义。Based on the importance of drug therapy in clinical treatment, this paper analyzes the shortcomings of current drug reminder devices, and designs a multi-function electronic medicine box with STM32 F103 VET6 microcontroller as the control core. The system includes a display module, a voice module, and a data storage module. The display module cooperates with the voice module through the touch screen circuit and the LED indicator circuit to realize the function of reminding and guiding the medicine;the data storage module can realize the function of not losing the medication information when the power is off through the EEPROM storage circuit.After testing, the medicine box can effectively help chronic diseases patients to take drugs on time, in a quantitative and correct manner,and is suitable for popularization in the family, and has high application value and practical significance.
标签: 电子药箱
上传时间: 2022-03-27
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目的:自主研制一款超声手术刀电源控制系统,以减少能量的消耗,维持手术刀的正常温度。方法:对超声换能器在谐振附近的等效电路建立模型,并设计基于数字信号处理(DSP)的超声手术刀的硬件控制系统。结果:经对电源控制系统的电路和工作性能测试,生成的电流和电压的有效值等参数,能够及时调整电源的频率,并达到预期的功能指标,使超声手术刀工作在谐振状态。结论:以DSP为核心设计的超声手术刀电源控制系统,测试指标均能够达到预期的要求,能够使系统在谐振状态下工作。Objective: To independently develop a power control system of ultrasonic scalpel so as to reduce the energy consumption and maintain the normal temperature of ultrasonic scalpel. Methods: In this paper, the model of equivalent circuit of ultrasonic transducer nearby syntony was built up, and the hardware control system of ultrasonic scalpel based on digital signal processing(DSP) was designed. Results: Through testing the circuit and work performance of power control system, the series of parameters such as effective value and so on which were produced by this system could adjust frequency of power source in time and attain anticipative functional indicator, and it took the ultrasonic scalpel to work in syntonic situation. Conclusion: The tested indicators of power control system of ultrasonic scalpel based on the kernel design of DSP can attain anticipative requirement, and can take this system to work in syntonic situation.
上传时间: 2022-04-03
上传用户:bluedrops
说明: 51单片机控制智能温控风扇,多档调节,pwd调速。包含源码和电路图(51 single chip computer control intelligent temperature control fan, multi-stage adjustment, PWD speed regulation. Contains source code and circuit diagrams)
上传时间: 2022-05-17
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ISO 26262《道路车辆功能安全》国际标准是针对总重不超过3.5吨八座乘用车,以安全相关电子电气系统的特点所制定的功能安全标准,基于IEC 61508《安全相关电气/电子/可编程电子系统功能安全》制定,在2011年11月15日正式发布。ISO 26262是史上第一个适用于大批量量产产品的功能安全(Functional Safety)标准。特别需要注意的是,ISO 26262仅针对安全相关电子电气系统,包含电机、电子与软件零件,不应用于非电子电气系统(如机械、液压等)。功能安全之设计议题在汽车领域已被重视,因其关系人员安全与公司商誉等问题,透过危害分析与风险评估(Hazard Analysis & Risk Assessment,HARA)及V模型设计架构,使功能安全需求等级得到一致性的分析结果,以利汽车电子系统之生命周期考虑到所需失效防止技术与管理要求,并借由设计开发、查证(Verification)及确认(Validation)等能力成熟度模型集成(CMMI-DEV)流程加以实现,使得产品之功能安全符合所需汽车安全完整性等级(ASIL)。
上传时间: 2022-05-30
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ISO 26262《道路车辆功能安全》国际标准是针对总重不超过3.5吨八座乘用车,以安全相关电子电气系统的特点所制定的功能安全标准,基于IEC 61508《安全相关电气/电子/可编程电子系统功能安全》制定,在2011年11月15日正式发布。ISO 26262是史上第一个适用于大批量量产产品的功能安全(Functional Safety)标准。特别需要注意的是,ISO 26262仅针对安全相关电子电气系统,包含电机、电子与软件零件,不应用于非电子电气系统(如机械、液压等)。功能安全之设计议题在汽车领域已被重视,因其关系人员安全与公司商誉等问题,透过危害分析与风险评估(Hazard Analysis & Risk Assessment,HARA)及V模型设计架构,使功能安全需求等级得到一致性的分析结果,以利汽车电子系统之生命周期考虑到所需失效防止技术与管理要求,并借由设计开发、查证(Verification)及确认(Validation)等能力成熟度模型集成(CMMI-DEV)流程加以实现,使得产品之功能安全符合所需汽车安全完整性等级(ASIL)。
上传时间: 2022-05-30
上传用户:
ISO 26262《道路车辆功能安全》国际标准是针对总重不超过3.5吨八座乘用车,以安全相关电子电气系统的特点所制定的功能安全标准,基于IEC 61508《安全相关电气/电子/可编程电子系统功能安全》制定,在2011年11月15日正式发布。ISO 26262是史上第一个适用于大批量量产产品的功能安全(Functional Safety)标准。特别需要注意的是,ISO 26262仅针对安全相关电子电气系统,包含电机、电子与软件零件,不应用于非电子电气系统(如机械、液压等)。功能安全之设计议题在汽车领域已被重视,因其关系人员安全与公司商誉等问题,透过危害分析与风险评估(Hazard Analysis & Risk Assessment,HARA)及V模型设计架构,使功能安全需求等级得到一致性的分析结果,以利汽车电子系统之生命周期考虑到所需失效防止技术与管理要求,并借由设计开发、查证(Verification)及确认(Validation)等能力成熟度模型集成(CMMI-DEV)流程加以实现,使得产品之功能安全符合所需汽车安全完整性等级(ASIL)。
上传时间: 2022-05-30
上传用户:得之我幸78
ISO 26262《道路车辆功能安全》国际标准是针对总重不超过3.5吨八座乘用车,以安全相关电子电气系统的特点所制定的功能安全标准,基于IEC 61508《安全相关电气/电子/可编程电子系统功能安全》制定,在2011年11月15日正式发布。ISO 26262是史上第一个适用于大批量量产产品的功能安全(Functional Safety)标准。特别需要注意的是,ISO 26262仅针对安全相关电子电气系统,包含电机、电子与软件零件,不应用于非电子电气系统(如机械、液压等)。功能安全之设计议题在汽车领域已被重视,因其关系人员安全与公司商誉等问题,透过危害分析与风险评估(Hazard Analysis & Risk Assessment,HARA)及V模型设计架构,使功能安全需求等级得到一致性的分析结果,以利汽车电子系统之生命周期考虑到所需失效防止技术与管理要求,并借由设计开发、查证(Verification)及确认(Validation)等能力成熟度模型集成(CMMI-DEV)流程加以实现,使得产品之功能安全符合所需汽车安全完整性等级(ASIL)。
上传时间: 2022-05-30
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