參數(shù)資料
型號(hào): 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(yè)數(shù): 86/109頁(yè)
文件大?。?/td> 815K
代理商: L64381
6-6
Instruction Set
6.3.3
Burst Read of
the Statistics
Counters
The L64381 Statistics Counters can be read from the Processor Interface
by using Burst Read instructions. The following steps describe how to
implement the burst read:
1.
Load the Statistics Counter number to be read (use the Write Statis-
tics Counters Address Register instruction).
2.
Execute the Burst Read Statistics Counter instruction. Upon detecting
this instruction, the L64381 automatically fetches the statistics for a
given port, and places the data in the Statistics Counters Data-Out
registers. The L64381 then places the data from these registers on
the PDATA[15:0] bus. The number of counters read depends on the
value programmed in the Burst Size Field of Configuration Register 1.
The PREADY signal is toggled after each register data is placed on
the PDATA[15:0] bus in order to delimit when data is valid on the bus.
Using a burst mode fetch of statistics allows the Processor Interface
to fetch statistics without having to generate separate read accesses.
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