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  • MT8870D DTMF解码芯片

    FEATURES• Complete DTMF Receiver• Low power consumption• Internal gain setting amplifier• Adjustable guard time• Central office quality• Power-down mode• Inhibit mode• Backward compatible withMT8870C/MT8870C-1Applications• Receiver system for British Telecom (BT) orCEPT Spec (MT8870D-1)• Paging systems• Repeater systems/mobile radio• Credit card systems• Remote control• Personal computers• Telephone answering machine

    标签: 8870D 8870 DTMF MT

    上传时间: 2013-11-20

    上传用户:mpquest

  • LPC1769 LPC1768 LPC1767 LPC176

    The LPC1769/68/67/66/65/64 are ARM Cortex-M3 based microcontrollers for embedded applications featuring a high level of integration and low power consumption. The ARM Cortex-M3 is a next generation core that offers system enhancements such as enhanced debug FEATURES and a higher level of support block integration.

    标签: LPC 1769 1768 1767

    上传时间: 2014-02-20

    上传用户:13215175592

  • LPC1700以太网MIIM接口应用笔记

    The LPC1700 Ethernet block contains a full featured 10 Mbps or 100 Mbps Ethernet MAC (Media Access Controller) designed to provide optimized performance through the use of DMA hardware acceleration. FEATURES include a generous suite of control registers, half or full duplex operation, flow control, control frames, hardware acceleration for transmit retry, receive packet filtering and wake-up on LAN activity. Automatic frame transmission and reception with Scatter-Gather DMA off-loads many operations from the CPU.

    标签: 1700 MIIM LPC 以太网

    上传时间: 2013-11-09

    上传用户:geshaowei

  • CAT28LV64-64Kb CMOS并行EEPROM数据手

    The CAT28LV64 is a low voltage, low power, CMOS Parallel EEPROM organized as 8K x 8−bits. It requires a simple interface for in−system programming. On−chip address and data latches, self−timed write cycle with auto−clear and VCC power up/down write protection eliminate additional timing and protection hardware. DATA Polling and Toggle status bit signal the start and end of the self−timed write cycle. Additionally, the CAT28LV64 FEATURES hardware and software write protection.

    标签: EEPROM 64 CMOS CAT

    上传时间: 2013-11-16

    上传用户:浩子GG

  • CAT25128-128Kb的SPI串行CMOS EEPRO

    The CAT25128 is a 128−Kb Serial CMOS EEPROM device internally organized as 16Kx8 bits. This FEATURES a 64−byte page write buffer and supports the Serial Peripheral Interface (SPI) protocol. The device is enabled through a Chip Select (CS) input. In addition, the required bus signals are clock input (SCK), data input (SI) and data output (SO) lines. The HOLD input may be used to pause any serial communication with the CAT25128 device. The device FEATURESsoftware and hardware write protection, including partial as well as full array protection.

    标签: 25128 EEPRO CMOS CAT

    上传时间: 2013-11-15

    上传用户:fklinran

  • FREERTOS的官方移植文档

    FEATURESThe following standard FEATURES are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, or explicitly callstaskYIELD().• Co-routines (light weight tasks that utilise very little RAM).• Message queues• Semaphores [via macros]• Trace visualisation ability (requires more RAM)• Majority of source code common to all supported development tools• Wide range of ports and examples

    标签: FREERTOS 移植 文档

    上传时间: 2013-10-13

    上传用户:13162218709

  • HCS12X系列存储器配置操作指南

    The HCS12X family is the successor to the HCS12family, with many additional FEATURES. One new feature isthe increased memory available to the CPU and themethods available to access it. This document focuses onthe improved memory map configuration.

    标签: HCS 12X 12 存储器

    上传时间: 2013-11-13

    上传用户:王者A

  • 开放式汇编器系统的设计

    汇编器在微处理器的验证和应用中举足轻重,如何设计通用的汇编器一直是研究的热点之一。本文提出了一种开放式的汇编器系统设计思想,在汇编语言与机器语言间插入中间代码CMDL(code mapping description language)语言,打破汇编语言与机器语言的直接映射关系,由此建立起一套描述汇编语言与机器语言的开放式映射体系。基于此开放式映射体系开发了一套汇编器系统,具有较高层次上的通用性和可移植性。【关键词】指令集,CMDL,汇编器,开放式 Design of Retargetable Assembler System Liu Ling Feng Wen Nan Wang Ying Chun Jiang An Ping Ji Li Jiu IME of Peking University, 100871【摘要】An assembler plays a very important role in the field of microprocessor verifications and applications, thus how to build a retargetable assembler system has been a hotspot in this field for long time. This paper presents a new method about the retargetable assembler system design.It provides a kind of language CMDL, code mapping description language. During the process of assembling, assembler languages are firstly translated to CMDL, and then mapped to the machine codes. In an other word, CMDL is inserted between assembler languages and machine codes during the translation procedure. As a medium code, CMDL has a lot of FEATURES, such as high extraction, strong descript capabilities. It can describe almost all attributes of assembler languages. By breaking the direct mapping relationship between assembler languages and machine codes, the complexities of machine codes are hided to the users, therefore, the new retargetable assembler system has higher retargetable level by converting the mapping from assembler languages and machine codes to assembler languages and CMDL, and implementationof it becomes easier. Based on the new mapping system structure, a retargetable assemblersystem is developed. It proved the whole system has good retargetability and implantability.【关键词】instruction set, symbol table, assembler, lexical analysis, retargetability

    标签: 开放式 汇编器

    上传时间: 2013-10-10

    上传用户:meiguiweishi

  • SJA1000 Stand-alone CAN contro

    The Controller Area Network (CAN) is a serial, asynchronous, multi-master communication protocol forconnecting electronic control modules, sensors and actuators in automotive and industrial applications.With the SJA1000, Philips Semiconductors provides a stand-alone CAN controller which is more than a simpleeplacement of the PCA82C200.Attractive FEATURES are implemented for a wide range of applications, supporting system optimization, diagnosisand maintenance.

    标签: Stand-alone contro 1000 SJA

    上传时间: 2013-11-18

    上传用户:yxgi5

  • PCA9516 5channel I2C hub

    The PCA9516 is a BiCMOS integrated circuit intended forapplication in I2C and SMBus systems.While retaining all the operating modes and FEATURES of the I2Csystem, it permits extension of the I2C-bus by buffering both the data(SDA) and the clock (SCL) lines, thus enabling five buses of 400 pF.The I2C-bus capacitance limit of 400 pF restricts the number ofdevices and bus length. Using the PCA9516 enables the systemdesigner to divide the bus into five segments off of a hub where anysegment to segment transition sees only one repeater delay.

    标签: 5channel 9516 PCA I2C

    上传时间: 2013-11-21

    上传用户:q123321