参数资料
型号: WJLXT972ALC.A4
厂商: INTEL CORP
元件分类: 网络接口
英文描述: DATACOM, ETHERNET TRANSCEIVER, PQFP64
封装: ROHS COMPLIANT, LQFP-64
文件页数: 33/97页
文件大小: 1281K
代理商: WJLXT972ALC.A4
Intel
LXT972A Single-Port 10/100 Mbps PHY Transceiver
Datasheet
39
Document Number: 249186-004
Revision Date: 25-Oct-2005
5.6.1
MII Clocks
The LXT972A Transceiver is the master clock source for data transmission, and it supplies both
MII clocks (RX_CLK and TX_CLK). It automatically sets the clock speeds to match link
conditions.
When the link is operating at 100 Mbps, the clocks are set to 25 MHz.
When the link is operating at 10 Mbps, the clocks are set to 2.5 MHz.
Figure 8 through Figure 10 show the clock cycles for each mode.
Note:
The transmit data and control signals must always be synchronized to TX_CLK by the MAC. The
LXT972A Transceiver samples these signals on the rising edge of TX_CLK.
Figure 8. Clocking for 10BASE-T
Figure 9. Clocking for 100BASE-X
RX_CLK
2.5 MHz during auto-negotiation and 10BASE-T Data & Idle
TX_CLK
2.5 MHz during auto-negotiation and 10BASE-T Data & Idle
Constant 25 MHz
XI
B3390-01
RX_CLK
2.5 MHz during auto-negotiation
TX_CLK
Constant 25 MHz
XI
25 MHz once 100BASE-X
Link Established
2.5 MHz during auto-negotiation
25 MHz once 100BASE-X
Link Established
B3391-01
相关PDF资料
PDF描述
WJLXT972ALC.A4 DATACOM, ETHERNET TRANSCEIVER, PQFP64
WJLXT972MLC.A4-864101 DATACOM, ETHERNET TRANSCEIVER, PQFP48
WJLXT972MLC.A4-864115 DATACOM, ETHERNET TRANSCEIVER, PQFP48
WJLXT972MLC.A4SE001 DATACOM, ETHERNET TRANSCEIVER, PQFP48
WJLXT972MLC.A4SE000 DATACOM, ETHERNET TRANSCEIVER, PQFP48
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