EM78P451_PG019_SPI

超声波模块制作了一个测距装置，HC-SR04自身不带温度补偿功能，所以加上一个使用DS18B20做的温度测量模块。整个系统包括：51单片机最小系统，超声波测距模块、温度测量模块、液晶显示模块。(The ultrasonic module has made a distance measuring device, HC-SR04 does not have temperature compensation function, so add a temperature measuring module using DS18B20. The whole system includes 51 single chip microcomputer minimum system, ultrasonic ranging module, temperature measurement module and LCD module.)

MC68HC11D3 Technical Data INTRODUCTION,The MC68HC11D3 and MC68HC11D0 are ROM-based high-performance microcontrollers (MCUs) based on the MC68HC11E9 design. Members of the Dx series are derived from the same mask and feature a high speed multiplexed bus capable of running at up to 3 MHz, and a fully static design that allows operations at frequencies to dc. The only difference between the MCUs in the Dx series is whether or not the ROM has been tested and guaranteed.

说明：  高频感应加热设备电器原理图 Protel99格式 PDF格式 高频感应加热设备电器原理图(Electrical schematic diagram of high frequency induction heating equipment)

说明：  MT7620N SCH&PCB,you can reference it to design yourselef.

开关电源谐振LLC 闭环全桥仿真电路，经典(Switching power supply resonant LLC closed loop full bridge simulation circuit, classic)

全志A33芯片资料，包括芯片手册，用户使用说明等等(Quanzhi A33 Chip Data)

说明：  rtl8370单芯片8口千兆交换机原理图(Rtl8370 single chip 8 gigabit switch schematic diagram)

DDR4原理图 PCB参考。 pdf版本原理图以及allegro PCB文件。(cadence ddr4 allegro pdf)

电荷泵的详细说明，帮助理解及计算电荷泵的电压翻转器(Detailed description of charge pump)

说明：  电荷泵的详细说明，帮助理解及计算电荷泵的电压翻转器(Detailed description of charge pump)