基于mpc92433芯片的简介及应用电路设计

字数:8064,页数:19

摘要
   简要介绍了作为双端输出LVPECL时钟合成器MPC92433芯片的功能、内部结构、引脚排列极其编程方式和电气性能.MPC94233是一个自带3.3V电压基于锁相环技术的时钟合成器可为用于中带范围高性能的电信，网络和计算机应用提供高性能的时钟发生器。输出频率范围是42.50MHZ到1428MHZ并且它支持两路差分PECL输出信号，这个器件满足最高时钟要求的需要。芯片有48个引脚,两路差分自带LVPECL高频输出,一个提供基准频率的片上晶体振荡器.

   关键字: 时钟合成器     可编程     性能

Abstract
It briefly introduced The MPC92433 as a dual output LVPECL clock synthesizer is function, internal structure, pin array, programming mode and electronic performance. The MPC92433 is a 3.3V compatible, PLL based clock synthesizer targeted for high performance clock generation in mid-range to high-performance telecom, networking, and computing applications. With output frequencies from 42.50 MHZ to 1428 MHZ and the support of two differential PECL output signals, the device meets the needs of the most demanding clock applications.MPC92433 has 48 bits and two differential, LVPECL- compatible high-frequency outputs, a on-chip crystal oscillator for reference frequency generation.

   Key words:  clock generation    programming    performance

目    录

MPC92433 芯片简介--------------------------------------------------------------------4
1.1特点------------------------------------------------------------------------------4
1.2典型应用--------------------------------------------------------------------------4
2.芯片结构和引脚功能-----------------------------------------------------------------4
3.电气特性---------------------------------------------------------------------------6
3.1 一般规格-------------------------------------------------------------------------7
3.2绝对最大化测定--------------------------------------------------------------------7
3.3 直流特性-------------------------------------------------------------------------7
3.4 交流特性-------------------------------------------------------------------------8
3.5 输出频率-------------------------------------------------------------------------9
4.可编程MPC9243 ---------------------------------------------------------------------11
4.1并行接口的使用--------------------------------------------------------------------11
4.2IIC接口的使用---------------------------------------------------------------------12
4.3设置合成器频率--------------------------------------------------------------------13
4. 3. 1读合成器频率------------------------------------------------------------------13
4. 3. 2用小步骤改变合成器频率--------------------------------------------------------13
4.4寄存器并行模式的存取--------------------------------------------------------------14
4. 4 . 1写模式-----------------------------------------------------------------------15
4 .4 . 2读模式-----------------------------------------------------------------------15
5.各部分结构极其功能-----------------------------------------------------------------15
5.1设备预制--------------------------------------------------------------------------15
5. 1. 1一般设备预制------------------------------------------------------------------15
5. 1. 2使用并行接口的预制------------------------------------------------------------15
5.2锁存检测--------------------------------------------------------------------------16
5.3时钟输出停止----------------------------------------------------------------------16
5.4滤波器----------------------------------------------------------------------------16
5.5片上晶体振荡器--------------------------------------------------------------------17
5.6MPC92433的抖动性能----------------------------------------------------------------17
5.7交流测试基准和输出终端------------------------------------------------------------18
6.总结-------------------------------------------------------------------------------19
7.参考文献---------------------------------------------------------------------------19

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