数据手册
3
双-速 快 ethernet transceiver — lxt970a
内容
1.0 管脚 assignments 和 信号 描述
....................................................10
2.0 函数的 描述
...........................................................................................18
2.1 介绍..........................................................................................................18
2.2 接口 (网络 媒介/协议 支持) .....................................................19
2.2.1 twisted-一双 接口 ............................................................................19
2.2.2 fiber 接口 ........................................................................................19
2.2.3 mii 接口 ...........................................................................................20
2.2.3.1 可选择的 驱动器 水平............................................................20
2.2.3.2 mii 数据 接口......................................................................21
2.2.3.3 repeater 模式..........................................................................24
2.2.3.4 mii 管理 接口 ........................................................24
2.2.4 硬件 控制 接口 ....................................................................26
2.3 运行 (所需的)东西 .....................................................................................27
2.3.1 电源 供应 (所需的)东西..................................................................27
2.3.1.1 optional mii 电源 供应........................................................27
2.3.2 涉及 时钟 (所需的)东西 .............................................................27
2.3.2.1 主控 时钟 模式 ...................................................................28
2.3.2.2 从动装置 时钟 模式 .....................................................................28
2.3.3 偏差 电路 (所需的)东西......................................................................29
2.4 initialization..........................................................................................................29
2.4.1 控制 模式 选择 ..........................................................................29
2.4.1.1 mdio 控制 模式 ..................................................................29
2.4.1.2 手工的 控制 模式 ................................................................29
2.4.2 link 配置 ..................................................................................29
2.4.2.1 手工的 配置 ................................................................30
2.4.2.2 自动-negotiation/并行的 发现 ..........................................30
2.5 monitoring 运算的 状态.............................................................................31
2.5.1 monitoring 状态 通过 mii 寄存器........................................................31
2.5.2 monitoring 状态 通过 指示信号 管脚 .......................................................32
2.6 100base-x 运作 ........................................................................................32
2.6.1 100base-x mii 行动....................................................................32
2.6.2 100base-x 网络 行动 ...........................................................33
2.7 10base-t 运作...........................................................................................35
2.7.1 10base-t mii 行动......................................................................35
2.7.2 10base-t 网络 行动..............................................................35
2.8 协议 sublayer 行动 .............................................................................35
2.8.1 pcs sublayer.........................................................................................35
2.8.1.1 100x preamble 处理 ..........................................................36
2.8.1.2 10t preamble 处理.............................................................36
2.8.1.3 数据 errors (100x 仅有的)............................................................36
2.8.1.4 collision indication ....................................................................37
2.8.1.5 sqe (10t 仅有的).........................................................................38
2.8.1.6 jabber (10t 仅有的) .....................................................................38
2.8.2 pma layer..............................................................................................38
2.8.2.1 100tx link 选项...................................................................38
2.8.2.2 10t link 测试.............................................................................38
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