数据手册
5
gigabit ethernet transceiver
—
LXT1000
2.7 10 mbps 运作..............................................................................................61
2.7.1 transmitting/接到...........................................................................62
2.7.2 极性 纠正..................................................................................62
2.7.3 link 测试.................................................................................................62
2.7.4 link 失败.............................................................................................62
2.7.5 sqe (heartbeat).....................................................................................62
2.7.6 Jabber ....................................................................................................63
2.7.7 preamble 一代 模式 ...................................................................63
2.8 lxt1000 运行 (所需的)东西......................................................................63
2.8.1 电源 .....................................................................................................63
2.8.2 时钟 ......................................................................................................63
2.8.3 rbias.....................................................................................................63
2.8.4 GBIAS ....................................................................................................64
3.0 应用 信息
.........................................................................................65
3.1 设计 recommendations ..................................................................................65
3.1.1 设备 placement ..................................................................................65
3.1.2 地面 平面 布局 .............................................................................65
3.1.3 电源 平面 布局 和 过滤 ..........................................................65
3.1.3.1 解耦 电容 ..............................................................66
3.1.4 rbias 和 gbias (所需的)东西 ..........................................................66
3.1.5 twisted-一双 布局................................................................................66
3.1.6 mac 接口 布局.............................................................................66
3.1.7 5v 容忍 仔细考虑 .................................................................66
3.1.8 主控/从动装置 relationship 详细信息..........................................................67
3.1.8.1 configuring 主控/从动装置 在 软件 .......................................67
3.1.8.2 configuring 主控/从动装置 在 硬件......................................68
3.1.8.3 决议 的 这 主控/从动装置 relationship.............................68
3.2 测试 信息 ..................................................................................................69
3.2.1 强迫 gig 运作.............................................................................69
3.2.2 gigabit transmit 测试 时钟 ...................................................................69
3.2.3 scrambler/encoder 使不能运转 (100m) .......................................................69
3.3 磁性材料 信息 .........................................................................................70
3.4 组件 manufacturers..................................................................................70
3.5 典型 应用 电路系统 ................................................................................71
3.5.1 典型 nic 应用 ..........................................................................71
4.0 测试 规格
..................................................................................................74
4.1 1000base-t 定时 参数 ........................................................................77
4.2 100base-tx 定时 参数........................................................................79
4.3 10base-t 定时 参数 ............................................................................81
4.4 自动-negotiation 定时 参数 ..................................................................86
4.5 mdio 定时 参数....................................................................................87
4.6 qstat 定时 参数 .................................................................................88
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