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參數(shù)資料
| 型號： | KSZ9021GN TR |
| 廠商： | Micrel Inc |
| 文件頁數(shù)： | 13/53頁 |
| 文件大?。?/td> | 0K |
| 描述： | TXRX ETHERNET GB GMII/MII 64MLF |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 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： | 帶卷 (TR) |
| 配用： | 576-3873-ND - BOARD EVALUATION FOR KSZ9021GN |
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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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| KSZ9021RL | 功能描述:以太網(wǎng) IC Gigabit Ethernet Transceiver with GMII 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 |
| KSZ9021RL-EVAL | 制造商:Micrel Inc 功能描述:GIGABIT ETHERNET TRANSCEIVER W 制造商:Micrel Inc 功能描述:KIT EVALUATION FOR KSZ9021RL |
| KSZ9021RLI | 功能描述:以太網(wǎng) IC Gigabit Ethernet Transceiver with RGMII, 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 |
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