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LAN9210 参数 Datasheet PDF下载

LAN9210图片预览
型号: LAN9210
PDF下载: 下载PDF文件 查看货源
内容描述: 外形小巧单芯片以太网控制器与HP Auto-MDIX的 [Small Form Factor Single- Chip Ethernet Controller with HP Auto-MDIX]
分类和应用: 控制器以太网
文件页数/大小: 458 页 / 4618 K
品牌: SMSC [ SMSC CORPORATION ]
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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface  
Datasheet  
14.2.9.7  
Free Running 25MHz Counter Register (FREE_RUN)  
Offset:  
09Ch  
Size:  
32 bits  
This read-only register reflects the current value of the free-running 25MHz counter. Refer to Section  
12.2, "Free-Running Clock," on page 161 for additional information.  
BITS  
DESCRIPTION  
Free Running Counter (FR_CNT)  
TYPE  
DEFAULT  
31:0  
RO  
00000000h  
This field reflects the current value of the free-running 32-bit counter. At  
reset, the counter starts at zero and is incremented by one every 25MHz  
cycle. When the maximum count has been reached, the counter will rollover  
to zero and continue counting.  
Note:  
The free running counter can take up to 160nS to clear after a reset  
event.  
Revision 1.2 (04-08-08)  
268  
SMSC LAN9312  
DATASHEET  
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