The LPC2292/2294 microcontrollers are based on a 16/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, together with 256 kB of embedded high-speed flash memory. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 pct with minimal performance penalty. With their 144-pin package, low power consumption, various 32-bit timers, 8-channel 10-bit ADC, 2/4 (LPC2294) advanced CAN channels, PWM channels and up to nine external interrupt pins these microcontrollers are particularly suitable for automotive and industrial control applications as well as medical systems and fault-tolerant maintenance buses. The number of available fast GPIOs ranges from 76 (with external memory) through 112 (single-chip). With a wide range of additional serial communications interfaces, they are also suited for communication gateways and protocol converters as well as many other general-purpose applications. Remark: Throughout the data sheet, the term LPC2292/2294 will apply to devices with and without the /00 or /01 suffix. The suffixes /00 and /01 will be used to differentiate from other devices only when necessary.
上传时间： 2014-12-30
上传用户：aysyzxzm
通过比较各种隔离数字通信的特点和应用范围，指出塑料光纤在隔离数字通信中的优势。使用已经标准化的TOSLINK接口，有利于节省硬件开发成本和简化设计难度。给出了塑料光纤的硬件驱动电路，说明设计过程中的注意事项，对光收发模块的电压特性和频率特性进行全面试验，并给出SPI口使用塑料光纤隔离通信的典型应用电路图。试验结果表明，该设计可为电力现场、电力电子及仪器仪表的设计提供参考。 Abstract: y comparing characteristics and applications area of various isolated digital communications， this article indicates advantages of plastic optical fiber in isolated digital communications. Using the standardized TOSLINK interface， it helps to control costs and difficulty in hardware development and design. Then it gives the hardware driver circuit of plastic optical fiber module， explains the noticed details in design process， gives results on the basis of the optical transceiver module voltage characteristics and frequency characteristics tests. Finally，it gives typical application circuit of the SPI communication port by using plastic optical fiber isolation .The results show that this design can be referenced for the power field， power electronics and instrumentation design.
上传时间： 2014-01-10
上传用户：gundan
The NXP LPC314x combine a 270 MHz ARM926EJ-S CPU core, High-speed USB 2.0OTG, 192 KB SRAM, NAND flash controller, flexible external bus interface, three channel10-bit A/D, and a myriad of serial and parallel interfaces in a single chip targeted atconsumer, industrial, medical, and communication markets. To optimize system powerconsumption, the LPC314x have multiple power domains and a very flexible ClockGeneration Unit (CGU) that provides dynamic clock gating and scaling.
上传时间： 2013-10-11
上传用户：yuchunhai1990
The LPC4350/30/20/10 are ARM Cortex-M4 based microcontrollers for embeddedapplications. The ARM Cortex-M4 is a next generation core that offers systemenhancements such as low power consumption, enhanced debug features, and a highlevel of support block integration.The LPC4350/30/20/10 operate at CPU frequencies of up to 150 MHz. The ARMCortex-M4 CPU incorporates a 3-stage pipeline, uses a Harvard architecture withseparate local instruction and data buses as well as a third bus for peripherals, andincludes an internal prefetch unit that supports speculative branching. The ARMCortex-M4 supports single-cycle digital signal processing and SIMD instructions. Ahardware floating-point processor is integrated in the core.The LPC4350/30/20/10 include an ARM Cortex-M0 coprocessor, up to 264 kB of datamemory, advanced configurable peripherals such as the State Configurable Timer (SCT)and the Serial General Purpose I/O (SGPIO) interface, two High-speed USB controllers,Ethernet, LCD, an external memory controller, and multiple digital and analog peripherals
上传时间： 2013-10-28
上传用户：15501536189
The NXP LPC315x combine an 180 MHz ARM926EJ-S CPU core, High-speed USB 2.0OTG, 192 KB SRAM, NAND flash controller, flexible external bus interface, an integratedaudio codec, Li-ion charger, Real-Time Clock (RTC), and a myriad of serial and parallelinterfaces in a single chip targeted at consumer, industrial, medical, and communicationmarkets. To optimize system power consumption, the LPC315x have multiple powerdomains and a very flexible Clock Generation Unit (CGU) that provides dynamic clockgating and scaling.The LPC315x is implemented as multi-chip module with two side-by-side dies, one fordigital fuctions and one for analog functions, which include a Power Supply Unit (PSU),audio codec, RTC, and Li-ion battery charger.
上传时间： 2014-01-17
上传用户：Altman
library IEEE; use IEEE.STD_LOGIC_1164.ALL; use IEEE.STD_LOGIC_ARITH.ALL; use IEEE.STD_LOGIC_UNSIGNED.ALL; ---- Uncomment the following library declaration if instantiating ---- any Xilinx primitives in this code. --library UNISIM; --use UNISIM.VComponents.all; entity counter is Port ( clk : in std_logic; resetn : in std_logic; dout : out std_logic_vector(7 downto 0); lcd_en : out std_logic; lcd_rs : out std_logic; lcd_rw : out std_logic); end counter;
上传时间： 2013-10-30
上传用户：wqxstar
用途：测量地磁方向，测量物体静止时候的方向，测量传感器周围磁力线的方向。注意，测量地磁时候容易受到周围磁场影响，主芯片HMC5883 三轴磁阻传感器特点（抄自网上）： 1，数字量输出：I2C 数字量输出接口，设计使用非常方便。 2，尺寸小: 3x3x0.9mm LCC 封装，适合大规模量产使用。 3，精度高：1－2 度，内置12 位A/D,OFFSET, SET/RESET 电路，不会出现磁饱和现象，不会有累加误差。 4，支持自动校准程序，简化使用步骤，终端产品使用非常方便。 5，内置自测试电路，方便量产测试，无需增加额外昂贵的测试设备。 6，功耗低：供电电压1.8V, 功耗睡眠模式-2.5uA 测量模式-0.6mA 连接方法： 只要连接VCC，GND，SDA，SDL 四条线。 Arduino GND -> HMC5883L GND Arduino 3.3V -> HMC5883L VCC Arduino A4 (SDA) -> HMC5883L SDA Arduino A5 (SCL) -> HMC5883L SCL (注意，接线是A4，A5，不是D4,D5) 源程序： #include <Wire.h> #include <HMC5883L.h> HMC5883Lcompass; voidsetup() { Serial.begin(9600); Wire.begin(); compass = HMC5883L(); compass.SetScale(1.3); compass.SetMeasurementMode(Measurement_Continuous); } voidloop() { MagnetometerRaw raw = compass.ReadRawAxis(); MagnetometerScaled scaled = compass.ReadScaledAxis(); float xHeading = atan2(scaled.YAxis, scaled.XAxis); float yHeading = atan2(scaled.ZAxis, scaled.XAxis); float zHeading = atan2(scaled.ZAxis, scaled.YAxis); if(xHeading < 0) xHeading += 2*PI; if(xHeading > 2*PI) xHeading -= 2*PI; if(yHeading < 0) yHeading += 2*PI; if(yHeading > 2*PI) yHeading -= 2*PI; if(zHeading < 0) zHeading += 2*PI; if(zHeading > 2*PI) zHeading -= 2*PI; float xDegrees = xHeading * 180/M_PI; float yDegrees = yHeading * 180/M_PI; float zDegrees = zHeading * 180/M_PI; Serial.print(xDegrees); Serial.print(","); Serial.print(yDegrees); Serial.print(","); Serial.print(zDegrees); Serial.println(";"); delay(100); }
上传时间： 2013-12-16
上传用户：stella2015
超声波传感器适用于对大幅的平面进行静止测距。普通的超声波传感器测距范围大概是 2cm~450cm，分辨率3mm（淘宝卖家说的，笔者测试环境没那么好，个人实测比较稳定的 距离10cm~2m 左右，超过此距离就经常有偶然不准确的情况发生了，当然不排除笔者技术 问题。） 测试对象是淘宝上面最便宜的SRF-04 超声波传感器，有四个脚：5v 电源脚（Vcc），触发控制端（Trig），接收端（Echo），地端（GND） 附:SRF 系列超声波传感器参数比较 模块工作原理： 采用IO 触发测距，给至少10us 的高电平信号； 模块自动发送8个40KHz 的方波，自动检测是否有信号返回； 有信号返回，通过IO 输出一高电平，高电平持续的时间就是超声波从发射到返回的时间．测试距离=(高电平时间*声速(340m/s))/2; 电路连接方法 Arduino 程序例子： constintTrigPin = 2; constintEchoPin = 3; floatcm; voidsetup() { Serial.begin(9600); pinMode(TrigPin, OUTPUT); pinMode(EchoPin, INPUT); } voidloop() { digitalWrite(TrigPin, LOW); //低高低电平发一个短时间脉冲去TrigPin delayMicroseconds(2); digitalWrite(TrigPin, HIGH); delayMicroseconds(10); digitalWrite(TrigPin, LOW); cm = pulseIn(EchoPin, HIGH) / 58.0; //将回波时间换算成cm cm = (int(cm * 100.0)) / 100.0; //保留两位小数 Serial.print(cm); Serial.print("cm"); Serial.println(); delay(1000); }
上传时间： 2013-10-18
上传用户：星仔
Port1.0 使用说明 Port1.0是作者本人在进行电子制作和维修过程中萌发的一个思路。在电子制作、维修中，经常要用到多路的脉冲信号或是要测量多路的脉冲信号。本软件可通过微机并口向用户提供多达12路的标准TTL脉冲信号，同时可进行5路的标准TTL脉冲信号的波形显示。 软件的使用方法极为简单。输出信号时，只要选中或取消引脚号，就能在相应的引脚得到相应的脉冲信号（统一为选中为高电平，取消为低电平），“清零”按钮为对应该组的所有信号清零。 输入信号的波形显示，按“开始”按钮为开始进行显示，“停止”为暂停。 在设置面板中，“数据读入时间间隔”为读入时间的设定。“并行打印端口设置”为显示微机中存在的可用打印端口，并可以设定本软件当前要使用的端口（如只有一个可用端口，就为缺省端口，如有多个可用端口软件自动选择最后一个可用端口为当前使用端口）。 本软件的输入波形显示没有运用VXD等的技术支持，在速度上不能做到高频的实时性，只能用在低速的环境下。这个版本没有提供多数据的连续输出。这些问题在下一个版本中得到改进和支持。 本软件可使用在微机的打印适配器、打印机等各种的并口设备检修中，还可用在各种数字电路、单片机的制作和维修中。在下一版本在这方面会有更大的支持。 * 注意：只支持win9x * 注意：并口的输入/输出电平为0－5伏TTL，不能连接高电压高电流的电路，以免埙坏主板或打印适配器。要连接COMS的0－12伏时请用户自做转换电路再连接。 * 注意：在使用本软件时最好不要同时使用打印机之类的并口设备。如本程序已运行请先关闭，再使用并口设备。
上传时间： 2014-04-18
上传用户：paladin
中文版详情浏览：http://www.elecfans.com/emb/fpga/20130715324029.html Xilinx UltraScale:The Next-Generation Architecture for Your Next-Generation Architecture The Xilinx® UltraScale™ architecture delivers unprecedented levels of integration and capability with ASIC-class system- level performance for the most demanding applications. The UltraScale architecture is the industr y's f irst application of leading-edge ASIC architectural enhancements in an All Programmable architecture that scales from 20 nm planar through 16 nm FinFET technologies and beyond, in addition to scaling from monolithic through 3D ICs. Through analytical co-optimization with the X ilinx V ivado® Design Suite, the UltraScale architecture provides massive routing capacity while intelligently resolving typical bottlenecks in ways never before possible. This design synergy achieves greater than 90% utilization with no performance degradation. Some of the UltraScale architecture breakthroughs include: • Strategic placement (virtually anywhere on the die) of ASIC-like system clocks, reducing clock skew by up to 50% • Latency-producing pipelining is virtually unnecessary in systems with massively parallel bus architecture, increasing system speed and capability • Potential timing-closure problems and interconnect bottlenecks are eliminated, even in systems requiring 90% or more resource utilization • 3D IC integration makes it possible to build larger devices one process generation ahead of the current industr y standard • Greatly increased system performance, including multi-gigabit serial transceivers, I/O, and memor y bandwidth is available within even smaller system power budgets • Greatly enhanced DSP and packet handling The Xilinx UltraScale architecture opens up whole new dimensions for designers of ultra-high-capacity solutions.
标签： UltraScale Xilinx 架构
上传时间： 2013-11-21
上传用户：wxqman
