參數(shù)資料
型號: KSZ9021GN
廠商: Micrel Inc
文件頁數(shù): 13/53頁
文件大?。?/td> 0K
描述: TXRX ETHERNET GB GMII/MII 64-MLF
標(biāo)準(zhǔn)包裝: 348
類型: 收發(fā)器
驅(qū)動器/接收器數(shù): 8/8
規(guī)程: 千兆位以太網(wǎng)
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 64-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 64-QFN(8x8)
包裝: 托盤
配用: 576-3873-ND - BOARD EVALUATION FOR KSZ9021GN
其它名稱: 576-3635
KSZ9021GN-ND
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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KSZ9021GN TR 功能描述:以太網(wǎng) IC Gigabit Ethernet Transceiver with GMII/MII RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ9021GN-EVAL 功能描述:以太網(wǎng)開發(fā)工具 Gigabit Ethernet Transceiver with GMII/MII - Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類型:Ethernet Transceivers 工具用于評估:KSZ8873RLL 接口類型:RMII 工作電源電壓:
KSZ9021GNI 功能描述:以太網(wǎng) IC Gigabit Ethernet Transceiver with GMII/MII, I-Temp RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ9021GQ 功能描述:以太網(wǎng) IC Gigabit Ethernet Transceiver with GMII/MII, Lead Free RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ9021GQI 功能描述:以太網(wǎng) IC Gigabit Ethernet Transceiver w/ GMII/MII, I-Temp RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray