关于电路设计的几点经验，从原理设计到实际应用，对一些个问题、经验综述

Microchip Technology Inc. 的HCS300 是一款跳码编码 器，它是专为安防遥控无钥门禁（RKE）系统而设计 的。 HCS300使用KEELOQ跳码技术，并具有安全性高、 封装尺寸小和成本低等特性。 HCS300 是单向遥控无钥 门禁系统和访问控制系统最完美的解决方案。-The HCS300 from Microchip Technology Inc. is a code hopping encoder designed for secure Remote Keyless Entry (RKE) systems. The HCS300 utilizes the KEELOQ code hopping technology, incorporating high security, a small package outline and low cost. The HCS300 is a perfect solution for unidirectional remote keyless entry systems and access control systems.via any external connection. The EEPROM data is pro-grammable but read-protected. 2006 Microchip Technology Inc.

51单片机写的液晶显示程序（1602），调通的，供初学者参考-51 Single-chip LCD written procedures (1602), tune

AT89S52单片机中数码管的循环显示的实现例子，可以让大家清楚看到这么用数码管来显示数字-AT89S52 MCU cycle of digital tube display examples realize that allows everyone to see so clearly with digital control to display the number of

PIC系列单片机程序设计基础。一般来说，PIC单片机的源程序并没有要求统一的格式，大家可以根据自己的风格来编写。-PIC microcontroller series based on the design process. Generally, the PIC source does not require a uniform format, we can according to their own style to prepare.

CAN 驱动程序 源码 经军DEVICENET的前提！-CAN driver source code as a prerequisite for military DeviceNET!

这是用单片机实现的多功能数字钟,通过8255扩展端口,AD0809将模拟信号转换成数字信号进行处理,可以比较精确的测出电压值.-This is the MCU multifunction digital clock, through the 8255 expansion port, AD0809 a conversion of analog signals into digital signal processing, more precise measuring the voltage values.

超声波倒车雷达应用方案，配合硬件电路一起使用-Ultrasonic reversing radar applications, used in conjunction with the hardware circuit

看到最近大家都关心 usbhost 的实现, 论坛上能找到的代码仅是一些简单的 demo , 完整的源码级的协议层是找不到的 我就贡献一把, 将我前一段时间移植成功的 USBHost 代码奉上 注意事项 1. ohci 层移植自 u-boot-1.3.2-rc3 2. fat 层移植自 gba_nds_fat 3. 本代码只是我产品中的一部分, 使用 Keil RTL 操作系统, 任务为 void task_usb(void) __task 保证完整, 想要跑起来可能需要做些修改与测试-?#39 ??????#39 蠹??脊匦?usbhost 的实现, 论坛上能找??的

是用AT89C2051主控音量控制PT2258,数码管显示, 红外线遥控,2.1/5.1音源选择)包括全套原理图,源程序,HEX文件-AT89C2051 is PT2258 master volume control, digital control, infra-red remote control, 2.1/5.1 sources choice), including a full set of schematics, source, the HEX file

51系列单片机指令列表，非常详细，对新手有帮助，-51 Series MCU instructions list is very detailed and helpful to newcomers,