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KSZ8041NL 参数 Datasheet PDF下载

KSZ8041NL图片预览
型号: KSZ8041NL
PDF下载: 下载PDF文件 查看货源
内容描述: 10BASE-T / 100BASE-TX物理层收发器 [10Base-T/100Base-TX Physical Layer Transceiver]
分类和应用:
文件页数/大小: 45 页 / 601 K
品牌: MICREL [ MICREL SEMICONDUCTOR ]
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Micrel, Inc.  
KSZ8041NL  
Power Management  
The KSZ8041NL offers the following power management modes:  
Power Saving Mode  
This mode is used to reduce power consumption when the cable is unplugged. It is in effect when auto-negotiation mode  
is enabled, cable is disconnected, and register 1F bit 10 is set to 1 (default setting). Under power saving mode, the  
KSZ8041NL shuts down all transceiver blocks, except for energy detect and PLL circuits. Additionally, in MII mode, the  
RXC clock output is disabled. RXC clock is enabled after the cable is connected and link is established.  
Power saving mode is disabled by writing a zero to register 1F bit 10.  
Power Down Mode  
This mode is used to power down the entire KSZ8041NL device when it is not in use. Power down mode is enabled by  
writing a one to register 0 bit 11. In the power down state, the KSZ8041NL disables all internal functions, except for the  
MII management interface.  
Reference Clock Connection Options  
A crystal or clock source, such as an oscillator, is used to provide the reference clock for the KSZ8041NL. The reference  
clock is 25MHz for MII mode and 50MHz for RMII mode. The following two figures illustrate how to connect the reference  
clock to XI / REFCLK (pin 9) and XO (pin 8) of the KSZ8041NL.  
Figure 4. 25MHz Crystal / Oscillator Reference Clock for MII Mode  
Figure 5. 50MHz Oscillator Reference Clock for RMII Mode  
October 2006  
22  
M9999-102406-1.0  
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