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  • Employing a Single-Chip Transceiver in Femtocell Base-Station Applications

    Abstract: This application note discusses the development and deployment of 3G cellular femtocell base stations. The technicalchallenges for last-mile residential connectivity and adding system capacity in dense urban environments are discussed, with 3Gfemtocell base stations as a cost-effective solution. Maxim's 3GPP TS25.104-compliant transceiver solution is presented along withcomplete radio reference designs such as RD2550. For more information on the RD2550, see reference design 5364, "FemtocellRadio Reference Designs Using the MAX2550–MAX2553 Transceivers."

    标签: Base-Station Applications Single-Chip Transceiver

    上传时间: 2013-11-07

    上传用户:songrui

  • The Linux Programming Interface - A Linux and UNIX System Programming Handbook

    The Linux Programming Interface - A Linux and UNIX System

    标签: Programming Linux Interface Handbook

    上传时间: 2013-11-10

    上传用户:asdstation

  • ARM经典300问与答

    第1 章 体系结构 ARM经典300问与答第1 问:Q:请问在初始化CPU 堆栈的时候一开始在执行mov r0, LR 这句指令时处理器是什么模式A:复位后的模式,即管理模式.第2 问:Q:请教:MOV 中的8 位图立即数,是怎么一回事 0xF0000001 是怎么来的A:是循环右移,就是一个0—255 之间的数左移或右移偶数位的来的,也就是这个数除以4一直除, 直到在0-255 的范围内它是整数就说明是可以的!A:8 位数(0-255)循环左移或循环右移偶数位得到的,F0000001 既是0x1F 循环右移4 位,符合规范,所以是正确的.这样做是因为指令长度的限制,不可能把32 位立即数放在32 位的指令中.移位偶数也是这个原因.可以看一看ARM 体系结构(ADS 自带的英文文档)的相关部分.第3 问:Q:请教:《ARM 微控制器基础与实战》2.2.1 节关于第2 个操作数的描述中有这么一段:#inmed_8r 常数表达式.该常数必须对应8 位位图,即常熟是由一个8 位的常数循环移位偶数位得到.合法常量:0x3FC,0,0xF0000000,200,0xF0000001.非法常量:0x1FE,511,0xFFFF,0x1010,0xF0000010.常数表达式应用举例:......LDR R0,[R1],#-4 ;读取 R1 地址上的存储器单元内容,且 R1 = R1-4针对这一段,我的疑问:1. 即常数是由一个8 位的常数循环移位偶数位得到,这句话如何理解2. 该常数必须对应8 位位图,既然是8 位位图,那么取值为0-255,怎么0x3FC 这种超出255 的数是合法常量呢3. 所举例子中,合法常量和非法常量是怎么区分的 如0x3FC 合法,而0x1FE 却非法0xF0000000,0xF0000001 都合法,而0xF0000010 又变成了非法4. 对于汇编语句 LDR R0,[R1],#-4,是先将R1 的值减4 结果存入R1,然后读取R1 所指单元的 值到R0,还是先读取R1 到R0,然后再将R1 减4 结果存入R1A:提示,任何常数都可用底数*2 的n 次幂 来表示.1. ARM 结构中,只有8bits 用来表示底数,因此底数必须是8 位位图.2. 8 位位图循环之后得到常数,并非只能是8 位.3. 0xF0000010 底数是9 位,不能表示.4. LDR R0, [R1], #-4 是后索引,即先读,再减.可以看一看ARM 体系结构对相关寻址方式的说明.

    标签: ARM 300

    上传时间: 2013-11-22

    上传用户:1109003457

  • MR-E-A伺服手册

    MR-E-A伺服手册

    标签: MR-E-A 伺服

    上传时间: 2013-10-30

    上传用户:半熟1994

  • MR-E-A伺服手册

    MR-E-A伺服手册

    标签: MR-E-A 伺服

    上传时间: 2013-10-16

    上传用户:liaocs77

  • Create a 1-Wire Master with Xilinx PicoBlaze

    Abstract: Designers who must interface 1-Wire temperature sensors with Xilinx field-programmable gate arrays(FPGAs) can use this reference design to drive a DS28EA00 1-Wire slave device. The downloadable softwarementioned in this document can also be used as a starting point to connect other 1-Wire slave devices. The systemimplements a 1-Wire master connected to a UART and outputs temperature to a PC from the DS28EA00 temperaturesensor. In addition, high/low alarm outputs are displayed from the DS28EA00 PIO pins using LEDs.

    标签: PicoBlaze Create Master Xilinx

    上传时间: 2013-11-12

    上传用户:大三三

  • AstroII-EVB-F1K(A)-L144开发板用户指南

        AstroII-EVB-F1K(A)-L144开发板用户指南

    标签: AstroII-EVB-F 144 开发板 用户

    上传时间: 2013-11-08

    上传用户:liuchee

  • CV181L-A-20_Specification_V1.0(大功放)

    cv181l-a-20

    标签: Specification_V 181 1.0 L-A

    上传时间: 2013-10-20

    上传用户:ikemada

  • Employing a Single-Chip Transceiver in Femtocell Base-Station Applications

    Abstract: This application note discusses the development and deployment of 3G cellular femtocell base stations. The technicalchallenges for last-mile residential connectivity and adding system capacity in dense urban environments are discussed, with 3Gfemtocell base stations as a cost-effective solution. Maxim's 3GPP TS25.104-compliant transceiver solution is presented along withcomplete radio reference designs such as RD2550. For more information on the RD2550, see reference design 5364, "FemtocellRadio Reference Designs Using the MAX2550–MAX2553 Transceivers."

    标签: Base-Station Applications Single-Chip Transceiver

    上传时间: 2013-11-05

    上传用户:超凡大师

  • program to trasmit data to a TI92 with the TI Graph-Link

    program to trasmit data to a TI92 with the TI Graph-Link

    标签: Graph-Link program trasmit data

    上传时间: 2015-01-03

    上传用户:youke111