參數(shù)資料
型號： M7020R-050ZA1T
廠商： 意法半導體
英文描述： CAP TANT 22UF 10V 20% POLY SMD
中文描述： 32K的× 68位進入網(wǎng)絡搜索引擎
文件頁數(shù)： 115/150頁
文件大?。?/td> 996K
代理商： M7020R-050ZA1T
115/150
M7020R
Table 47. Latency of SEARCH from Cycles C and D to SRAM Access Cycle, 272-bit, Up to 31
Devices
Table 48. Shift of SSF and SSV from SADR
MIXED SEARCHES
Tables Configured with Different Widths Using
an M7020R
The sample operation shown is for a single device
with CFG = 1001000. It contains three tables of
x68, x136, and x272 widths. The operation may be
generalized to a block of 8–31 devices using four
blocks; the timing and the pipeline operation is the
same as described previously for fixed searches
on a table of one-width-size.
Figure 85, page 116 shows three sequential
searches:
– a 68-bit search on the table configured as x68;
– a 136-bit search on a table configured as x136;
and
– a 272-bit search on the table configured as x272
bits that each results in a hit.
Note:
The DQ[67:66] will be '00' in both of the Cy-
cles A and B of the x68-bit search (Search1).
DQ[67:66] is '01' in both of the Cycles A and B of
the x136-bit search (Search2). DQ[67:66] is '10' in
all of the Cycles A, B, C, and D of the x272-bit
search (Search 3). By having table designation
bits, the M7020R enables the creation of many ta-
bles in a bank of search engines of different
widths.
Figure 86, page 117 shows the sample table. Two
bits in each 68-bit entry will need to designated as
the Table Number Bits. One example choice can
be the '00' values for the table configured as x68,
'01' values for tables configured as x136, and '10'
values for tables configured as x272. For the
above explanation, it is further assumed that bits
[67:66] for each entry will be designed as these
Table Designation Bits.
# of devices
Max Table Size
Latency in CLK Cycles
1 (TLSZ = 00)
8K x 272-bit
4
2–8 (TLSZ = 01)
64K x 272-bit
5
9–31 (TLSZ = 10)
248K x 272-bit
6
HLAT
Number of CLK Cycles
000
0
001
1
010
2
011
3
100
4
101
5
110
6
111
7
相關(guān)PDF資料
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M7020R-066ZA1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32K x 68-bit Entry NETWORK SEARCH ENGINE
M7020R-083ZA1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32K x 68-bit Entry NETWORK SEARCH ENGINE
M702-230442 功能描述:火線接頭 IEEE 1394 SMT 4P HORIZONTAL RoHS:否 制造商:Molex 產(chǎn)品:IEEE 1394 Firewire Connectors 標準:IEEE 1394 位置/觸點數(shù)量:6 節(jié)距:2 mm 觸點電鍍:Unplated 觸點材料:Phosphor Bronze 型式:Female 電流額定值:0.5 A 安裝風格:Through Hole 端接類型:Solder Tab 連接器類型:Firewire Receptacle
M702-230642 功能描述:火線接頭 IEEE 1394 SMT 6P HORIZONTAL RoHS:否 制造商:Molex 產(chǎn)品:IEEE 1394 Firewire Connectors 標準:IEEE 1394 位置/觸點數(shù)量:6 節(jié)距:2 mm 觸點電鍍:Unplated 觸點材料:Phosphor Bronze 型式:Female 電流額定值:0.5 A 安裝風格:Through Hole 端接類型:Solder Tab 連接器類型:Firewire Receptacle
M7023 制造商:Tamura Corporation of America 功能描述:
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