The PW3130 series product is a high integration solution for lithium-lion/polymer batteryprotection.PW3130 contains advanced power MOSFET, high-accuracy voltage detection circuits anddelay circuits. PW3130 is put into an ultra-small SOT23-5 package and only one external componentmakes it an ideal solution in limited space of battery pack. PW3130 has all the protection functionsrequired in the battery application including overcharging, overdischarging, overcurrent and loadshort circuiting protection etc. The accurate overcharging detection voltage ensures safe and fullutilization charging.The low standby current drains little current from the cell while in storage. Thedevice is not only targeted for digital cellular phones, but also for any other Li-Ion and Li-Polybattery-powered information appliances requiring long-term battery life
标签： pw3130
上传时间： 2022-02-11
上传用户：fliang
高清电子书-C++ Primer Plus, 第6版英文版 1438页Learning C++ is an adventure of discovery, particularly because the language accommodates several programming paradigms, including object-oriented programming, generic programming, and the traditional procedural programming.The fifth edition of this book described the language as set forth in the ISO C++ standards, informally known as C++99 and C++03, or, sometimes as C++99/03. (The 2003 version was largely a technical correction to the 1999 standard and didn’t add any new features.) Since then, C++ continues to evolve.As this book is written, the international C++ Standards Committee has just approved a new version of the standard.This standard had the informal name of C++0x while in development, and now it will be known as C++11. Most contemporary compilers support C++99/03 quite well, and most of the examples in this book comply with that standard. But many features of the new standard already have appeared in some implementations, and this edition of C++ Primer Plus explores these new features. C++ Primer Plus discusses the basic C language and presents C++ features, making this book self-contained. It presents C++ fundamentals and illustrates them with short, to-the-point programs that are easy to copy and experiment with.You learn about input/output (I/O), how to make programs perform repetitive tasks and make choices, the many ways to handle data, and how to use functions.You learn about the many features C++ has added to C, including the followi
标签： C++
上传时间： 2022-02-19
上传用户：trh505
该问题由某客户提出，发生在 STM32F103VBT6 器件上。据其工程师讲述：在为 STM32 调试软件过程中，遇到了一个怪现象：有如表（一）所示的一段程序中，KeyIn 是一个全局变量。当有按键按下时，键盘的中断服务程序会将对应的键值放入其中，当按键释放后，键盘中断服务程序则把 RESET 值放入该变量。行（1）的条件语句在主程序中，检测有无按键按下，并处理。行（2）则是等待按键释放。调试时，在行（1）和行（2）处各设置一个断点，然后全速运行程序。当程序停在行（1）时按下按键，继续全速运行程序。当程序
标签： while循环
上传时间： 2022-02-21
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电子书-十天学会单片机实例100.pdf//实例 4：用单片机控制一个灯闪烁：认识单片机的工作频率 #include<reg51.h> //包含单片机寄存器的头文件 /**************************************** 函数功能：延时一段时间 *****************************************/ void delay(void) //两个 void 意思分别为无需返回值，没有参数传递 { unsigned int i; //定义无符号整数，最大取值范围 65535 for(i=0;i<20000;i++) //做 20000 次空循环 ; //什么也不做，等待一个机器周期 } /******************************************************* 函数功能：主函数 （C 语言规定必须有也只能有 1 个主函数） ********************************************************/ void main(void) { while(1) //无限循环 { P1=0xfe; //P1=1111 1110B， P1.0 输出低电平 delay(); //延时一段时间 P1=0xff; //P1=1111 1111B， P1.0 输出高电平 www.91
标签： 单片机
上传时间： 2022-03-19
上传用户：kingwide
电子书-RTL Design Style Guide for Verilog HDL540页A FF having a fixed input value is generated from the description in the upper portion of Example 2-21. In this case, ’0’ is output when the reset signal is asynchronously input, and ’1’ is output when the START signal rises. Therefore, the FF data input is fixed at the power supply, since the typical value ’1’ is output following the rise of the START signal. When FF input values are fixed, the fixed inputs become untestable and the fault detection rate drops. When implementing a scan design and converting to a scan FF, the scan may not be executed properl not be executed properly, so such descriptions , so such descriptions are not are not recommended. recommended.[1] As in the lower part of Example 2-21, be sure to construct a synchronous type of circuit and ensure that the clock signal is input to the clock pin of the FF. Other than the sample shown in Example 2-21, there are situations where for certain control signals, those that had been switched due to the conditions of an external input will no longer need to be switched, leaving only a FF. If logic exists in a lower level and a fixed value is input from an upper level, the input value of the FF may also end up being fixed as the result of optimization with logic synthesis tools. In a situation like this, while perhaps difficult to completely eliminate, the problem should be avoided as much as possible.
标签： RTL verilog hdl
上传时间： 2022-03-21
上传用户：canderile
在全球气候变暖和石油资源短缺的形势下,推动新能源汽车的发展将成为汽车行业一种新的发展方向。在大力发展新能源电动汽车行业的同时还应兼顾电动汽车充电设施的发展,因此对电动汽车充电桩的设计与研究显得十分必要。对电动汽车直流充电桩的硬件系统进行设计,主要的硬件电路包括安全监测电路、总压采集电路、温湿度检测电路、语音电路。软件包括主要流程图和温湿度检测流程图。Under the situation of global warming and shortage of petroleum resources,promoting the development of new energy vehicles will become a new development direction for the automotive industry.while vigorously developing the new energy electric vehicle industry,we should also take into account the development of electric vehicle charging facilities.Therefore,the design and research of electric vehicle charging piles is very necessary.The hardware system of the electric vehicle DC charging pile is designed.The main hardware circuits include safety monitoring circuit,total voltage collecting circuit,temperature and humidity detecting circuit,voice circuit and CAN communication.The software includes a main flow chart and a temperature and humidity detection flow chart.
标签： 电动汽车
上传时间： 2022-04-03
上传用户：jason_vip1
最近经理通知要做项目了，让我选型一个LCD开始试着做下。这是我用仿真实现的一个smt32的硬件SPI1来驱动的ST7735R，难度挺小的，因为大部分的代码LCD的厂商已经给我们提供了，我们主要修改成硬件SPI来驱动就好了。 此次仿真上面有2个问题，不知道是代码的问题还是仿真图上的问题。第一个问题是仿真运行时有时会出通信数据传输问题，导致指令越界报警，这个可能是SPI不稳定导致的；第二个问题是在改用SPI2或者SPI3来驱动没有任何反应，猜测是代码时钟没开对或者仿真图上面还要加上具体晶振。 代码工程和仿真工程都已压缩打包，可放心下载。。。先贴上仿真实现图： 再贴上部分代码：/**ST7735驱动**/#include "ST7735.h"#include "usart.h" u16 BACK_COLOR, POINT_COLOR; //背景色，画笔色 void WriteCommand_7735(u8 CmdData) //写指令{SPI_LCD_CS_LOW; //片选SPI_LCD_COMMAND_W;//写指令SPI_I2S_SendData(LCD_SPIx,CmdData);while (SPI_I2S_GetFlagStatus(LCD_SPIx, SPI_I2S_FLAG_TXE) == RESET){}SPI_LCD_CS_HIGH;} void WriteDate_7735(u8 Data) //写8位数据{SPI_LCD_CS_LOW; //片选SPI_LCD_DATA_W;//写数据SPI_I2S_SendData(LCD_SPIx,Data);while(SPI_I2S_GetFlagStatus(LCD_SPIx, SPI_I2S_FLAG_TXE) == RESET){} SPI_LCD_CS_HIGH; } void WriteDate16(int data) //写16位数据{WriteDate_7735(data>>8);WriteDate_7735(data);} 字符限制了，贴不了多少，2积分即可下载。。。
标签： stm32 硬件 spi 驱动 tft lcd proteus
上传时间： 2022-04-12
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S32K1xx Series Reference Manual 用户手册--2029页 Supports S32K116, S32K118, S32K142, S32K144, S32K146, and S32K148S32K是一款符合AEC-Q100规范、基于32位ARM Cortex-M4F和Cortex-M0+内核的MCU，适用于通用汽车和高可靠性工业应用。The S32K1xx product series further extends the highly scalable portfolio of Arm® Cortex®-M0+/M4F MCUs in the automotive industry. It builds on the legacy of the KEA series, while introducing higher memory options alongside a richer peripheral set extending capability into a variety of automotive applications. With a 2.70–5.5 V supply and focus on automotive environment robustness, the S32K product series devices are well suited to a wide range of applications in electrically harsh environments, and are optimized for cost-sensitive applications offering low pin-count options. The S32K product series offers a broad range of memory, peripherals, and package options. It shares common peripherals and pin counts, allowing developers to migrate easily within an MCU family or among the MCU families to take advantage of more memory or feature integration. This scalability allows developers to use the S32K product series as the standard for their end product platforms, maximizing hardware and software reuse and reducing time to market
标签： S32K116 S32K118 S32K142 S32K144
上传时间： 2022-04-16
上传用户：jason_vip1
随着电磁阀在工业和日常应用的增多,其功耗越来越被人们所重视。通过对电磁阀驱动电路的研究,设计一套电磁阀节能驱动电路。不仅提高了电磁阀的响应时间,更重要的是降低了功耗,使电磁阀由工作在大电流状态下,变成大电流启动小电流维持的工作状态。减少了由电流过大引起的电磁阀线圈过热,增加了电磁阀的安全性。The power consumption of an electromagnetic valve is drawing increasingly more attentiori as it is widely used in industrial production and daily life. In this study, an energy - saving driving circuit of electromagnetic valves was designed. It can make an electromagnetic valve to start with a high current while work with a low current; thereby the power consumption can be reduced. Besides, it can shorten the response time of an electromagnetic valve and improve the security of the valve.
上传时间： 2022-04-16
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为适应双向DC/DC功率变换的电流采样需求,一种高精度高边电流采样电路被提出。其基本思想是在功率电路的高边串入采样电阻,借助电流镜原理并引入偏置电流电路,将双向电流均转换为正向电压输出。通过理论分析与仿真结合的方法对电流镜采样原理及4种不同的偏置电流电路方案进行对比,最后通过实验数据验证了高精度高边电流采样电路的有效性。实验数据表明,该采样电路可在-25~75℃的温度工作范围内,针对-10~＋10 A范围内的电流采样实现优于5%的采样精度。Current sensing plays an important role in controlling,monitoring or protection functions of power systems.To meet the current sensing requirement of bidirectional DC/DC converters,a high-accuracy bidirectional current sensing circuit is proposed.The proposed current sensing circuit inserts a resistor in the path of the current to be sensed,while the current mirror and biased current circuit are introduced.Therefore,the bidirectional current can be expressed by positive voltage.By theoretical analysis and simulation,the sampling theory is analyzed and four biased current circuits are compared.At last,experimental results verified the proposed method.It is demonstrated that the proposed current sensing circuit can achi...
上传时间： 2022-04-22
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