数据手册
3
快 ethernet 10/100 四方形 transceivers — lxt974/lxt975
内容
1.0 管脚 assignments 和 信号 描述
....................................................10
2.0 函数的 描述
...........................................................................................19
2.1 介绍..........................................................................................................19
2.2 网络 媒介 / 协议 支持.......................................................................20
2.2.1 10/100 mbps 网络 接口 .............................................................20
2.2.1.1 twisted-一双 接口 ...............................................................20
2.2.1.2 fiber 接口 ...........................................................................21
2.2.2 mii 接口 ...........................................................................................21
2.2.2.1 mii 数据 接口......................................................................21
2.2.2.2 mii 管理 接口 ........................................................24
2.2.3 硬件 控制 接口 ....................................................................25
2.3 initialization..........................................................................................................27
2.3.1 mdio 控制 模式 ...............................................................................27
2.3.2 手工的 控制 模式 .............................................................................27
2.3.3 link 配置 ..................................................................................28
2.4 自动-negotiation..................................................................................................29
2.4.1 并行的 发现 ...................................................................................29
2.4.2 controlling 自动-negotiation ..................................................................29
2.4.3 monitoring 自动-negotiation...................................................................29
2.5 100 mbps 运作............................................................................................30
2.5.1 100base-x mii 行动....................................................................30
2.5.2 100base-x 网络 行动 ...........................................................30
2.5.3 100base-x 协议 sublayer 行动 ............................................33
2.5.4 pcs sublayer.........................................................................................33
2.5.4.1 preamble 处理....................................................................33
2.5.4.2 数据 errors ................................................................................34
2.5.4.3 collision indication ....................................................................34
2.5.5 pma sublayer ........................................................................................35
2.5.5.1 Link............................................................................................35
2.5.5.2 link 失败 override .................................................................35
2.5.5.3 运输车 sense (crs) .................................................................35
2.5.6 twisted-一双 pmd sublayer ...................................................................35
2.5.6.1 scrambler/descrambler (100tx 仅有的) ......................................35
2.5.6.2 baseline wander 纠正 .....................................................36
2.5.6.3 极性 纠正.....................................................................36
2.5.7 fiber pmd sublayer ...............................................................................36
2.6 10 mbps 运作..............................................................................................36
2.6.1 10base-t mii 运作........................................................................36
2.6.2 10base-t 网络 行动..............................................................36
2.6.2.1 preamble 处理....................................................................37
2.6.2.2 link 测试....................................................................................37
2.6.2.3 link 失败................................................................................37
2.6.2.4 sqe (heartbeat)........................................................................37
2.6.2.5 Jabber .......................................................................................37
2.7 led 功能.....................................................................................................37
2.7.1 串行 led 输出 ..................................................................................38
: 点此下载
