DM9000A中文手册 - 图文

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南京电研电力自动化股份有限公司 http://www.naco.com.cn

注:转载

DAVICOM Semiconductor, Inc.

DM9000A

Ethernet Controller

with General Processor Interface

中文数据手册

Preliminary

Version: DM9000A-DS-P03

Apr. 21, 2005

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目 录

1. 概述 .......................................................................................................................... 5 2. 模块图 ...................................................................................................................... 5 3. 特性 .......................................................................................................................... 5 4. 引脚配置 .................................................................................................................. 6

4.1(16位模式) ..................................................................................................................... 6 4.2(8位模式) ....................................................................................................................... 7

5. 引脚描述 .................................................................................................................. 7

5.1处理器接口 ......................................................................................................................... 7

5.1.1 8位模式引脚 ........................................................................................................... 8 5.2 EEPROM接口 ................................................................................................................... 8 5.3时钟引脚 ............................................................................................................................. 9 5.4 LED接口 ............................................................................................................................ 9 5.5 10/100 PHY/Fiber ............................................................................................................... 9 5.6其他 ................................................................................................................................... 10 5.7电源引脚 ........................................................................................................................... 10 5.8捆绑引脚列表(Strap pins table) .................................................................................. 10

6. 控制和状态寄存器列表 ........................................................................................ 10

6.1网络控制寄存器(NCR) ............................................................................................... 12 6.2网络状态寄存器(NSR) ............................................................................................... 13 6.3发送控制寄存器(TCR) ............................................................................................... 13 6.4数据包1发送状态寄存器1(TSR I) .......................................................................... 13 6.5数据包2发送状态寄存器2(TSR II) ......................................................................... 14 6.6接收控制寄存器(RCR) ............................................................................................... 14 6.7接收状态寄存器(RSR) ............................................................................................... 15 6.8接收溢出计数寄存器(ROCR) .................................................................................... 15 6.9背压阈值寄存器(BPTR) ............................................................................................. 15 6.10流控制阈值寄存器(FCTR) ....................................................................................... 16 6.11接收/发送流控制寄存器(RTFCR) ........................................................................... 16 6.12 EEPROM与PHY控制寄存器(EPCR) .................................................................... 17 6.13 EEPROM与PHY地址寄存器(EPAR) .................................................................... 17 6.14 EEPROM与PHY数据寄存器(EPDRL/EPDRH) ................................................... 18 6.15唤醒控制寄存器(WCR) ............................................................................................ 18 6.16物理地址(MAC)寄存器(PAR) ............................................................................ 18 6.17多播地址寄存器(MAR) ............................................................................................ 19 6.18通用目的控制寄存器(GPCR) .................................................................................. 19 6.19通用目的寄存器(GPR) ............................................................................................. 19 6.20 TX SRAM读指针地址寄存器(TRPAL/TRPAH) .................................................... 20 6.21 RX SRAM写指针地址寄存器(RWPAL/RWPAH) .................................................. 20 6.22厂家ID寄存器(VID) ............................................................................................... 20 6.23产品ID寄存器(PID) ................................................................................................ 20 6.24芯片版本寄存器(CHIPR) ......................................................................................... 20 6.25发送控制寄存器2(TCR2) ........................................................................................ 20

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6.26操作测试控制寄存器(OCR) ..................................................................................... 21 6.27特殊模式控制寄存器(SMCR) .................................................................................. 21 6.28即将发送控制/状态寄存器(ETXCSR) .................................................................... 22 6.29校验和控制寄存器(TCSCR) .................................................................................... 22 6.30接收校验和控制状态寄存器(RCSCSR) .................................................................. 22 6.31内存数据预取读命令寄存器(地址不加1)(MRCMDX) ......................................... 23 6.32内存数据读命令寄存器(地址不加1)(MRCMDX1) ............................................... 23 6.33内存数据读命令寄存器(地址加1)(MRCMD) ........................................................ 23 6.34内存数据读地址寄存器(MRRL/ MRRH) ................................................................ 23 6.35内存数据写命令寄存器(地址不加1)(MWCMDX) ................................................ 23 6.36内存数据写命令寄存器(地址加1)(MWCMD) ....................................................... 24 6.37内存数据写地址寄存器(MWRL/ MWRH).............................................................. 24 6.38发送数据包长度寄存器(TXPLL/TXPLH)............................................................... 24 6.39中断状态寄存器 (ISR) ............................................................................................. 24 6.40中断屏蔽寄存器(IMR) ............................................................................................. 24

7.EEPROM格式 ..................................................................................................... 25 8.PHY寄存器描述 .................................................................................................. 26

8.1基本模式控制寄存器(BMCR) ................................................................................... 27 8.2基本模式状态寄存器(BMSR) .................................................................................... 28 8.3 PHY ID标识符寄存器#1(PHYID1) ........................................................................... 29 8.4 PHY ID标识符寄存器#2(PHYID1) ........................................................................... 29 8.5自动协商通知寄存器(ANAR) .................................................................................... 30 8.6自动协商连接对象寄存器(ANLPAR) ....................................................................... 31 8.7自动协商扩展寄存器(ANER) .................................................................................... 32 8.8 DAVICOM指定配置寄存器(DSCR) ......................................................................... 33 8.9 DAVICOM指定配置和状态寄存器(DSCSR) ........................................................... 34 8.10 10BASE-T配置/状态(10BTCSR) ............................................................................ 36 8.11掉电控制寄存器(PWDOR) ....................................................................................... 36 8.12指定配置寄存器(SCR) ............................................................................................. 37

9. 功能描述 ................................................................................................................ 38

9.1 主机接口(HI) ............................................................................................................. 38 9.2 直接内存访问控制(DMAC) ...................................................................................... 38 9.3 数据包发送(PT) ......................................................................................................... 38 9.4 数据包接收(PR) ......................................................................................................... 38 9.5 100Base-TX操作 ............................................................................................................. 39

9.5.1 4B5B编码器 ......................................................................................................... 39 9.5.2扰频器(Scrambler) ........................................................................................... 39 9.5.3 并--串转换 ............................................................................................................ 39 9.5.4 NRZ码到NRZI码转换 ....................................................................................... 39 9.5.5 NRZI码到MLT-3码转换 .................................................................................... 39 9.5.6 MLT-3驱动 ............................................................................................................ 39 9.5.7 4B5B编码 ............................................................................................................. 40 9.6 100Base-TX接收器 ......................................................................................................... 40

9.6.1 信号检测 ............................................................................................................... 41

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9.6.2 自适应补偿 ........................................................................................................... 41 9.6.3 MLT-3到NRZI解码 ............................................................................................ 41 9.6.4 时钟复原模块 ....................................................................................................... 41 9.6.5 NRZI 到NRZ ....................................................................................................... 41 9.6.6 串-并转换 ........................................................................................................... 41 9.6.7 扰频器 ................................................................................................................... 41 9.6.8 编码组对齐模块 ................................................................................................... 41 9.6.9 4B5B解码 ............................................................................................................. 42 9.7 10Base-T操作 .................................................................................................................. 42 9.8 冲突检测 .......................................................................................................................... 42 9.9 载波检测 .......................................................................................................................... 42 9.10 自动协商 ........................................................................................................................ 42 9.11 省电模式 ........................................................................................................................ 42

9.11.1 掉电模式 ............................................................................................................. 43 9.11.2 降低发送损耗模式 ............................................................................................. 43

10 DC与AC电器特性 .............................................................................................. 43

10.1 最大绝对额定值 ............................................................................................................ 43

10.1.1 工作条件 ............................................................................................................. 43 10.2 DC电器特性(VDD=3.3V) ....................................................................................... 44 10.3 AC电器特性与时序 ...................................................................................................... 44

10.3.1 TP接口 ................................................................................................................ 44 10.3.2 晶振/振荡时钟 .................................................................................................... 44 10.3.3 I/O读时序 ........................................................................................................... 45 10.3.4 I/O写时序 ........................................................................................................... 45 10.3.5 EEPROM接口时序 ............................................................................................. 46

11应用说明 ................................................................................................................. 46

11.1网络接口信号接线 ......................................................................................................... 46 11.2 10Base-T/100Base-TX自动MDIX应用 ...................................................................... 47 11.3 10Base-T/100Base-TX无自动MDIX变压器应用 ...................................................... 47 11.4电源退偶电容 ................................................................................................................. 47 11.5地平面布局 ..................................................................................................................... 48 11.6电源平面分割 ................................................................................................................. 49 11.7铁氧体磁珠选择指导 ..................................................................................................... 50 11.8晶振选择指导 ................................................................................................................. 50

12封装信息 ................................................................................................................ 50 13订购信息 ................................................................................................................ 52

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DM9000A

翻译人:许建华、刘煜、程志成 2009-9-1 版 权:翻译版权归作者三方所有,不得随意传播。

1. 概述

DM9000A是一款完全集成的、性价比高、引脚数少、带有通用处理器接口的单芯片快速以太网控制器。一个10/100M PHY和4K 双字的SRAM 。它是出于低功耗和高性能目的设计的,其IO端口支持3.3V与5V容限值。

DM9000A为适应各种处理器,提供了8位、16位数据接口访问内部存储器。DM9000A物理协议层接口完全支持使用10MBps下3类、4类、5类非屏蔽双绞线和100MBps下5类非屏蔽双绞线。这是完全遵照IEEE 802.3u标准。它的自动协商功能将自动完成DM9000A配置以使其发挥出最佳性能。它还支持IEEE 802.3x全双工流量控制。

2. 模块图

3. 特性

■ 48脚 LQFP封装

■ 支持处理器接口:I/O口的字节或字命令对内部存储器进行读写操作 ■ 集成自适应(AUTO-MDIX)10/100M收发器

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