SH79F1622是一种高速高效率8051兼容单片机。在同样振荡频率下，较之传统的8051芯片具有运行更快速，性能更优越的特性。SH79F1622保留了标准8051芯片的大部分特性，包括内置256字节RAM和3个16位定时器/计数器。此外， SH79F1622还集成了1280字节外部扩展RAM，以及存储程序的16K字节Flash块。SH79F1622还集成双路音频发生模块，低电压复位， TWI通讯功能， 以及触摸按键与LED共享功能来节省引脚，非常适合于触摸按键应用控制。此外， SH79F1622集成了看门狗定时器， EUART等功能。
标签： 音频发生器
上传时间： 2022-02-13
上传用户：得之我幸78
Realtek交换机设计选型参考设计交换机时候，确定了具体的芯片方案厂家以后，主要考虑以下几个方面：1：接口的情况：是要多少网口及其它延伸接口，采用什么封装形式；2：网口的带宽：是千兆还是百兆，或万兆；3：协议情况：管理型还是傻瓜式；4：POE供电：是否需要通过网口给设备供电；5：供电处理：内置电源模块还是外接供电，供电电压和电流要求；6：针对工业应用领域，有专门的工业级方案。设计的时候，需要根据具体的结构来实施布局走线，需要综合考虑，确保数据传输效率高运行稳！结合Realtek系列方案，做一些分析推荐选型。
上传时间： 2022-02-14
上传用户：ttalli
The PW2053 is a high-efficiency monolithic synchronous buck regulator using a constantfrequency, current mode architecture. The device is available in an adjustable version. Supply currentwith no load is 40uA and drops to <1uA in shutdown. The 2.5V to 5.5V input voltage range makesthe PW2053 ideally suited for single Li-Ion battery powered applications. 100% duty cycle provideslow dropout operation, extending battery life in portable systems. PWM/PFM mode operationprovides very low output ripple voltage for noise sensitive applications. Switching frequency isinternally set at 1.2MHz, allowing the use of small surface mount inductors and capacitors. Lowoutput voltages are easily supported with the 0.6V feedback reference voltage
标签： pw2053
上传时间： 2022-02-14
上传用户：jason_vip1
PW1555 is a programmable current limit switch with input voltage range selection and outputvoltage clamping. Extremely low RDS(ON) of the integrated protection N-channel FET helps toreduce power loss during the normal operation. Programmable soft-start time controls the slew rateof the output voltage during the start-up time. Independent enable control allows the complicatedsystem sequencing control. It integrates the over-temperature protection shutdown andautorecovery with hystersis
标签： pw1555
上传时间： 2022-02-14
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The PW8205A8TS is the highest performance trench N-ch MOSFETs with extreme high cell density,which provide excellent RDSON and gate charge for most of the small power switching and loadswitch applications. The meet the RoHS and Product requirement with full function reliabilityapproved .
标签： 8205a8
上传时间： 2022-02-14
上传用户：wangshoupeng199
The PW8205A6S uses advanced trench technology to provide excellent RDS(ON), low gate chargeand operation with gate voltages as low as 2.5V. This device is suitable for use as a Battery protectionor in other Switching application.
标签： 8205a6
上传时间： 2022-02-14
上传用户：
首先下载软件，解压软件，安装在程序中找到SEGGER,选里面的J-FLASH，进入界面，刚开始的那个界面可以忽略，不用建project也可以；单击菜单栏的“Options---Project settings”打开设置，进行jlink配置;正在General选项，选择“USB”，一般都是默认配置，确认一下即可;然后在CPU选项，选择芯片型号，先选择“Device”才能选择芯片型号，芯片型号，要根据你使用的芯片进行选择;在Target interface选项 里面选择SWD模式;首先Target里面选“Connection”连接目标芯片，然后 Target--Auto进行程序烧写;首先Target里面选择“Connection”连接目标芯片，然后 Target--Auto进行程序烧写.SEGGER J-Links are the most widely used line of debug probes available today. They've proven their value for more than 10 years in embedded development. This popularity stems from the unparalleled performance, extensive feature set, large number of supported CPUs, and compatibility with all popular development environments.
标签： JLINK
上传时间： 2022-03-22
上传用户：
我们在完成 PCB 的设计后，要把设计文件转换成光绘文件，一方面利于文档保密，另一方面方便 PCB 厂家生产。 下面以一个 6 层板为例， 规范一下 Gerber文件输出的步骤和详细设置。 采用图文并茂的方式，详细介绍了Altium Designer如何生成Gerber、钻孔文件、坐标文件。
上传时间： 2022-03-24
上传用户：
本系统采用电动机电枢供电回路串接采样电阻的方式来实现对小型直流有刷电动机的转速测量。该系统主要由二阶低通滤波电路,小信号放大电路、单片机测量显示电路、开关稳压电源电路等组成。同时自制电机测速装置,用高频磁环作为载体,用线圈绕制磁环,利用电磁感应原理检测电机运行时的漏磁,将变化的磁场信号转化为磁环上的感应电流。用信号处理单元电路将微弱电信号转化为脉冲信号,送由单片机检测,从而达到准确测量电机的速度的要求。In this system, the sampling resistance of armature power supply circuit is connected in series to measure the speed of small DC brush motor. The system is mainly composed of second-order low-pass filter circuit, small signal amplifier circuit, single-chip measurement and display circuit, switching regulated power supply circuit and so on. At the same time, the self-made motor speed measuring device uses high frequency magnetic ring as the carrier, coil winding magnetic ring, and electromagnetic induction principle to detect the leakage of magnetic field during the operation of the motor, which converts the changed magnetic field signal into the induced current on the magnetic ring. The weak electric signal is transformed into pulse signal by signal processing unit circuit, which is sent to single chip computer for detection, so as to meet the requirement of accurate measurement of motor speed.
标签： 直流电动机
上传时间： 2022-03-26
上传用户：
随着光伏发电系统快速发展,以及电动汽车充电桩的普及,传统的剩余电流保护器无法满足实际需求。介绍了一款B型剩余电流保护器,采用磁调制剩余电流互感器和零序电流互感器采集剩余电流。根据GB/T 22794—2017标准要求,可识别1 kHz及以下的正弦交流、带和不带直流分量的脉动直流、平滑直流等剩余电流信号。经信号调理电路将电压信号送到单片机进行采集和判断。通过试验测试,该样机在测试精度和速度上均符合国家标准的相关要求。The rapid development of photovoltaic power generation systems and the popularity of electric vehicle charging piles make the traditional residual current protective devices unable to meet the actual demand.This paper proposed a type B residual current protective device,which uses the magnetically modulated residual current transformer and the zero sequence current transformer to acquire the residual current.According to the requirements of GB/T 22794—2017,the type B residual current protective device can detect sinusoidal AC residual current of 1kHz and below 1kHz,pulsating DC residual current with and without DC component,smooth DC residual current and so on.The signal processing circuit sends the voltage signal to the MCU for acquisition and judgment.Through experimental tests,the device meets the relevant requirements of national standards in terms of test accuracy and speed.
标签： 电流保护器
上传时间： 2022-03-27
上传用户：
