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參數(shù)資料
| 型號： | L64381 |
| 廠商： | LSI Corporation |
| 英文描述： | 4-Port Ethernet Controller(四端口以太網(wǎng)控制器) |
| 中文描述： | 4端口以太網(wǎng)控制器（四端口以太網(wǎng)控制器） |
| 文件頁數(shù)： | 31/109頁 |
| 文件大?。?/td> | 815K |
| 代理商： | L64381 |
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Statistics Counters Registers
2-15
EXCCOLM
Excessive Collision Port x Error Mask
A one on any of the bits in this field masks the
corresponding port’s excessive collision error. Each bit in
this field corresponds to one of the four ports. The least-
significant bit corresponds to Port 0; the most-significant
bit corresponds to Port 3.
[7:4]
LINKFLM
Link Failure Port x Error Mask
A one on any of the bits in this field masks the
corresponding port’s link failure error. Each bit in this field
corresponds to one of the four ports. The least-significant
bit corresponds to Port 0; the most-significant bit
corresponds to Port 3.
[3:0]
2.6
Statistics
Counters
Registers
This section describes the five registers that are used to access the
Statistics Counters: the Statistics Counters Address Register, the two
Statistics Counters Data-In Registers, and the two Statistics Counters
Data-Out Registers.
2.6.1
Statistics
Counters
Address
Register
Figure 2.10 shows the Statistics Counters Address Register. This
read/write register stores a pointer to the Statistics Counters. This pointer
is used to either read a counter value or write a value to the specified
counter. When a burst read instruction is performed, the L64381
increments the counter value automatically, but the port number remains
unaffected. Similarly in the autoincrement diagnostics mode, the L64381
does not increment the port number.
Figure 2.10
Statistics Counters
Address Register
R
Reserved
These bits are reserved and read as zeros.
[15:7]
STAT
Statistics Counter
These bits determine to which counter the read/write
access pertains.
[6:2]
15
7
6
2
1
0
R
STAT
PORT
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