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参数资料
| 型号： | KSZ9021GN |
| 厂商： | Micrel Inc |
| 文件页数： | 13/53页 |
| 文件大小： | 0K |
| 描述： | TXRX ETHERNET GB GMII/MII 64-MLF |
| 标准包装： | 348 |
| 类型： | 收发器 |
| 驱动器/接收器数： | 8/8 |
| 规程： | 千兆位以太网 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-VFQFN 裸露焊盘 |
| 供应商设备封装： | 64-QFN（8x8） |
| 包装： | 托盘 |
| 配用： | 576-3873-ND - BOARD EVALUATION FOR KSZ9021GN |
| 其它名称： | 576-3635 KSZ9021GN-ND |
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Micrel, Inc.
KSZ9021GN
September 2010
20
M9999-091010-1.1
Figure 3. Auto-Negotiation Flow Chart
For 1000Base-T mode, auto-negotiation is required and always used to establish a link. During 1000Base-T auto-
negotiation, the Master and Slave configuration is first resolved between link partners, and then the link is established
with the highest common capabilities between link partners.
Auto-negotiation is enabled by default at power-up or after hardware reset. Afterwards, auto-negotiation can be enabled
or disabled through register 0 bit 12. If auto-negotiation is disabled, the speed is set by register 0 bits 6 and 13, and the
duplex is set by register 0 bit 8.
If the speed is changed on the fly, the link goes down and either auto-negotiation or parallel detection will initiate until a
common speed between KSZ9021GN and its link partner is re-established for a link.
If link is already established and there is no change of speed on the fly, then the changes will not take effect unless
either auto-negotiation is restarted through register 0 bit 9, or a link down to link up transition occurs (i.e., disconnecting
and reconnecting the cable).
After auto-negotiation is completed, the link status is updated in register 1 and the link partner capabilities are updated
in registers 5, 6, and 10.
The auto-negotiation finite state machines employ interval timers to manage the auto-negotiation process. The duration
of these timers under normal operating conditions are summarized in the following table.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| KSZ9021GN TR | 功能描述:以太网 IC Gigabit Ethernet Transceiver with GMII/MII RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ9021GN-EVAL | 功能描述:以太网开发工具 Gigabit Ethernet Transceiver with GMII/MII - Evaluation Board RoHS:否 制造商:Micrel 产品:Evaluation Boards 类型:Ethernet Transceivers 工具用于评估:KSZ8873RLL 接口类型:RMII 工作电源电压: |
| KSZ9021GNI | 功能描述:以太网 IC Gigabit Ethernet Transceiver with GMII/MII, I-Temp RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ9021GQ | 功能描述:以太网 IC Gigabit Ethernet Transceiver with GMII/MII, Lead Free RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
| KSZ9021GQI | 功能描述:以太网 IC Gigabit Ethernet Transceiver w/ GMII/MII, I-Temp RoHS:否 制造商:Micrel 产品:Ethernet Switches 收发器数量:2 数据速率:10 Mb/s, 100 Mb/s 电源电压-最大:1.25 V, 3.45 V 电源电压-最小:1.15 V, 3.15 V 最大工作温度:+ 85 C 封装 / 箱体:QFN-64 封装:Tray |
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