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  • SN65LBC170,SN75LBC170,pdf(TRIP

    The SN65LBC170 and SN75LBC170 aremonolithic integrated circuits designed forbidirectional data communication on multipointbus-transmission lines. Potential applicationsinclude serial or parallel data transmission, cabledperipheral buses with twin axial, ribbon, ortwisted-pair cabling. These devices are suitablefor FAST-20 SCSI and can transmit or receivedata pulses as short as 25 ns, with skew lessthan 3 ns.These devices combine three 3-state differentialline drivers and three differential input linereceivers, all of which operate from a single 5-Vpower supply.The driver differential outputs and the receiverdifferential inputs are connected internally to formthree differential input/output (I/O) bus ports thatare designed to offer minimum loading to the buswhenever the driver is disabled or VCC = 0. Theseports feature a wide common-mode voltage rangemaking the device suitable for party-lineapplications over long cable runs.

    标签: 170 LBC SN TRIP

    上传时间: 2013-10-13

    上传用户:ytulpx

  • UPSD3200系列单片机概述

    本章简单介绍了单片机技术与SOC技术的发展,以及μPSD3200系列单片机的技术性能。 单片机是单片微型计算机(Single Chip Microcomputer)的简称,它的内部包含有计算机的基本功能部件:中央处理器(CPU)、存储器、定时/计数器、各种串/并行I/O接口电路等。因此,单片机只需要和适当的软件及外部设备相结合,便可成为一个单片机控制系统。 近年来,由于半导体技术和工艺的快速发展,以及针对各行各业的实际应用需要,单片机的开发方面又出现了许多新的技术。SOC(SystemOnChip,片上系统)等名词日益被人们所熟悉和关注。

    标签: UPSD 3200 单片机概述

    上传时间: 2013-10-15

    上传用户:jasonheung

  • 单片机的发展暨SPCE061A单片机的介绍

    什么是单片机?所谓单片机(Single Chip Microcomputer),是指在一块芯片中集成有中央处理器(CPU)、存储器(RAM和ROM)、基本I/O接口以及定时器、记数器等部件,并具有独立指令系统的智能器件,即在一块芯片上实现一台微型计算机的基本功能。特点是:体积小,控制功能强,性价比高等

    标签: SPCE 061A 061 单片机

    上传时间: 2013-10-08

    上传用户:wushengwu

  • AD9859芯片资料

    FEATURES400 MSPS internal clock speedIntegrated 10-bit DAC32-bit tuning wordPhase noise ≤ –120 dBc/Hz @ 1 kHz offset (DAC output)Excellent dynamic performance>75 dB SFDR @ 160 MHz (±100 kHz offset) AOUTSerial I/O control1.8 V power supplySoftware and hardware controlled power-down48-lead TQFP/EP packageSupport for 5 V input levels on most digital inputsPLL REFCLK multiplier (4× to 20×)Internal oscillator; can be driven by a single crystalPhase modulation capabilityMultichip synchronization

    标签: 9859 AD 芯片资料

    上传时间: 2014-12-04

    上传用户:axin881314

  • FET430PIF自制资料

    The MSP-FET430PIF is a Parallel Port interface (does not include target board) that is used to program and debug MSP430 FET tools and test boards through the JTAG interface. This interface is included in our FET tools, but sold without the development board. This interface uses a Parallel PC Port to communicate to the Debugger Software (IAR Kickstart software included) running on the PC. The interface uses the standard 14 pin header to communicate to the MSP430 device using the standard JTAG protocol. The flash memory can be erased and programmed in seconds with only a few keystrokes, and since the MSP430 flash is extremely low power, no external power supply is required. The tool has an integrated software environment and connects directly to the PC which greatly simplifies the set-up and use of the tool. The flash development tool supports development with all MSP430 flash parts. Features MSP430 debugging interface to connect a MSP430-Flash-device to a Parallel port on a PC Supports JTAG debug protocol (NO support for Spy-Bi-Wire (2-wire JTAG) debug protocol, Spy-Bi-Wire (2-wire JTAG) is supported by MSP-FET430UIF) Parallel Port cable and a 14-conductor target cable Full documentation on CD ROM Integrated IAR Kickstart user interface which includes: Assembler Linker Limulator Source-level debugger Limited C-compiler Technical specifications: Backwardly compatable with existing FET tool boards.

    标签: FET 430 PIF

    上传时间: 2013-10-26

    上传用户:fengweihao158@163.com

  • Cortex-M3 技术参考手册

    Cortex-M3 技术参考手册 Cortex-M3是一个32位的核,在传统的单片机领域中,有一些不同于通用32位CPU应用的要求。谭军举例说,在工控领域,用户要求具有更快的中断速度,Cortex-M3采用了Tail-Chaining中断技术,完全基于硬件进行中断处理,最多可减少12个时钟周期数,在实际应用中可减少70%中断。   单片机的另外一个特点是调试工具非常便宜,不象ARM的仿真器动辄几千上万。针对这个特点,Cortex-M3采用了新型的单线调试(Single Wire)技术,专门拿出一个引脚来做调试,从而节约了大笔的调试工具费用。同时,Cortex-M3中还集成了大部分存储器控制器,这样工程师可以直接在MCU外连接Flash,降低了设计难度和应用障碍。   ARM Cortex-M3处理器结合了多种突破性技术,令芯片供应商提供超低费用的芯片,仅33000门的内核性能可达1.2DMIPS/MHz。该处理器还集成了许多紧耦合系统外设,令系统能满足下一代产品的控制需求。ARM公司希望Cortex-M3核的推出,能帮助单片机厂商实.  Cortex的优势应该在于低功耗、低成本、高性能3者(或2者)的结合。  Cortex如果能做到 合理的低功耗(肯定要比Arm7 & Arm9要低,但不大可能比430、PIC、AVR低) + 合理的高性能(10~50MIPS是比较可能出现的范围) + 适当的低成本(1~5$应该不会奇怪)。  简单的低成本不大可能比典型的8位MCU低。对于已经有8位MCU的厂商来说,比如Philips、Atmel、Freescale、Microchip还有ST和Silocon Lab,不大可能用Cortex来打自己的8位MCU。对于没有8位MCU的厂商来说,当然是另外一回事,但他们在国内进行推广的实力在短期内还不够。  对于已经有32位ARM的厂商来说,比如Philips、Atmel、ST,又不大可能用Cortex来打自己的Arm7/9,对他们来说,比较合理的定位把Cortex与Arm7/9错开,即<40MIPS的性能+低于Arm7的价格,当然功耗也会更低些;当然这样做的结果很可能是,断了16位MCU的后路。  对于仍然在推广16位MCU的厂商来说,比如Freescal、Microchip,处境比较尴尬,因为Cortex基本上可以完全替代16位MCU。  所以,未来的1~2年,来自新厂商的Cortex比较值得期待-包括国内的供应商;对于已有32位ARM的厂商,情况比较有趣;对于16位MCU的厂商,反应比较有意思。  关于编程模式  Cortex-M3处理器采用ARMv7-M架构,它包括所有的16位Thumb指令集和基本的32位Thumb-2指令集架构,Cortex-M3处理器不能执行ARM指令集。  Thumb-2在Thumb指令集架构(ISA)上进行了大量的改进,它与Thumb相比,具有更高的代码密度并提供16/32位指令的更高性能。  关于工作模式  Cortex-M3处理器支持2种工作模式:线程模式和处理模式。在复位时处理器进入“线程模式”,异常返回时也会进入该模式,特权和用户(非特权)模式代码能够在“线程模式”下运行。  出现异常模式时处理器进入“处理模式”,在处理模式下,所有代码都是特权访问的。  关于工作状态  Coretx-M3处理器有2种工作状态。  Thumb状态:这是16位和32位“半字对齐”的Thumb和Thumb-2指令的执行状态。  调试状态:处理器停止并进行调试,进入该状态。

    标签: Cortex-M 技术参考手册

    上传时间: 2013-12-04

    上传用户:坏坏的华仔

  • NEC 16位MCU参考手册

    NEC 16位MCU参考手册 The 78K0R/IC3 is a 16-bit single-chip microcontroller that uses a 78K0R CPU core and incorporates peripheral functions, such as ROM/RAM, a multi-function timer, a multi-function serial interface, an A/D converter, a programmable gain amplifier (PGA), a comparator, a real-time counter, and a watchdog timer.

    标签: NEC MCU 参考手册

    上传时间: 2013-11-02

    上传用户:努力努力再努力

  • A Single-Chip Pulsoximeter Des

    This application report discusses the design of non-invasive optical plethysmographyalso called as pulsoximeter using the MSP430FG437 Microcontroller (MCU). Thepulsoximeter consists of a peripheral probe combined with the MCU displaying theoxygen saturation and pulse rate on a LCD glass. The same sensor is used for bothheart-rate detection and pulsoximetering in this application. The probe is placed on aperipheral point of the body such as a finger tip, ear lobe or the nose. The probeincludes two light emitting diodes (LEDs), one in the visible red spectrum (660nm) andthe other in the infrared spectrum (940nm). The percentage of oxygen in the body isworked by measuring the intensity from each frequency of light after it transmitsthrough the body and then calculating the ratio between these two intensities.

    标签: Pulsoximeter Single-Chip Des

    上传时间: 2013-10-27

    上传用户:黑漆漆

  • 用户程序示例教程

    用户程序示例教程 The Blinky project is a simple program for the LPC2138using Keil MCB2130 Microcontroller Board. It blinks the LEDs at speed according to the Potentiometer setting and prints the current seting to the Serial Port 1.In addition it generates a sine wave with an adjustable frequency on the speaker of the board.

    标签: 用户 教程 程序

    上传时间: 2014-12-27

    上传用户:hongmo

  • 数字时钟应用资料

    数字时钟应用资料 单片计算机即单片微型计算机。(Single-Chip Microcomputer ),是 集CPU ,RAM ,ROM ,定时,计数和多种接口于一体的微控制器。他体积小,成本低,功能强,广泛应用于智能产品和工业自动化上。而51 单片机是各单片机中最为典型和最有代表性的一种。这次毕业设计通过对它的学习,应用,从而达到学习、设计、开发软、硬的能力。

    标签: 数字时钟 应用资料

    上传时间: 2013-10-13

    上传用户:zhqzal1014