一个简单的进销存系统，用power builder编写，SQL数据库
标签： 进销存系统
上传时间： 2015-04-30
上传用户：123啊
Chipcon CC2420 reference design w/PA board rev B CC2420_w_PA_PCB.ZIP FABRICATION.PHO - fabrication drawing COPPER1.PHO - copper layer #1 (top side) COPPER2.PHO - copper layer #2 (inner ground plane) COPPER3.PHO - copper layer #3 (inner power plane) COPPER4.PHO - copper layer #4 (bottom side) TOPMASK.PHO - top side solder mask BOTTOMMASK.PHO - bottom side solder mask NCDRILL.DRL - drill data file NCDRILL.LST - drill list NCDRILL.REP - drill report
标签： 2420 FABRICATION reference fabricati
上传时间： 2015-05-12
上传用户：xc216
最新版的嵌入式bootloader源代码，可以轻松的在一周之内一直到各类MCU上，如MIPS，ARM7，ARM9，XScale，Power PC等平台。
标签： bootloader 嵌入式 源代码
上传时间： 2013-11-29
上传用户：siguazgb
he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its Duty Cycle. That s the High Time during one period divided by the period. It can also be calculated as the average value during a particular period. That means after low pass filtering, (e.g. RC circuit) the signal becomes analog, with an actual value controlled by the microcontroller. The PWM functionality enables the LPC932 to control for example the speed of DC motors or the brightness of electric lighting.
标签： signal Modulated analog create
上传时间： 2015-05-14
上传用户：CHINA526
为了广大“电子爱好者”网友需求，将PROTEL99SE软件制作印刷电路版*.DDB文件 转换成POWER PCB识别的*.PCB文件软件提供给你们。
标签： 电子爱好者
上传时间： 2013-12-17
上传用户：thinode
非常好的资料，包括44B0原理图和PCB，以及LCD调试程序，包括CPU,MEMORY,UART,USB,POWER模块，适合学习之用。
标签：
上传时间： 2014-01-10
上传用户：zmy123
软件工程实验报告__信息管理系统需求分析与数据库设计，使用工具：MS VISIO2003、Power Designer
上传时间： 2013-12-12
上传用户：gdgzhym
Features • Compatible with MCS-51® Products • 8K Bytes of In-System Programmable (ISP) Flash Memory – Endurance: 1000 Write/Erase Cycles • 4.0V to 5.5V Operating Range • Fully Static Operation: 0 Hz to 33 MHz • Three-level Program Memory Lock • 256 x 8-bit Internal RAM • 32 Programmable I/O Lines • Three 16-bit Timer/Counters • Eight Interrupt Sources • Full Duplex UART Serial Channel • Low-power Idle and Power-down Modes • Interrupt Recovery from Power-down Mode • Watchdog Timer • Dual Data Pointer • Power-off Flag
标签： 8226 Programmable Compatible In-System
上传时间： 2015-06-27
上传用户：dianxin61
EasyD12动态连接库是Microsoft Windows的接口标准，流行的软件开发工具VC、VB、VF、Delphi、C++ Builder、Power Builder 等均可使用。用户可以选用自己喜爱的工具轻松搞定USB开发。其中包含2个版本DLL，根据情况自己选择。
标签： Microsoft Windows EasyD 12
上传时间： 2014-01-19
上传用户：hzy5825468
光学设计软件zemax源码： This DLL models an nular aspheric surface as described in: "Annular surfaces in annular field systems" By Jose M. Sasian Opt. eng. 36 (12) P 3401-3401 December 1997 This surface is essentially an odd aspheric surface with an offset in the aspheric terms. The sag is given by: Z = (c*r*r) / (1+(1-((1+k)*c*c*r*r))^ 1/2 ) + a*(r-q)^2 + b*(r-q)^3 + c*(r-q)^4 + ... Note the terms a, b, c, ... have units of length to the -1, -2, -3, ... power.
标签： described aspheric surfaces Annular
上传时间： 2014-01-08
上传用户：yyyyyyyyyy
