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參數(shù)資料
| 型號： | M7010R |
| 廠商： | 意法半導體 |
| 英文描述： | 16K x 68-bit Entry NETWORK SEARCH ENGINE |
| 中文描述： | 16K的× 68位進入網(wǎng)絡搜索引擎 |
| 文件頁數(shù)： | 37/67頁 |
| 文件大小： | 449K |
| 代理商： | M7010R |
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M7010R
68-bit Logical SEARCH
The logical, 68-bit SEARCH operation is shown in
Figure 26. The entire table of 68-bit entries is com-
pared to a 68-bit word K (presented on the DQ Bus
in both Cycles A and B of the command) using the
GMR and the local mask bits. The effective GMR
is the 68-bit word specified by the identical value
in both even and odd GMR pairs selected by the
GMR Index in the command
’
s Cycle A. The 68-bit
word K (presented on the DQ Bus in both Cycles
A and B of the command) is also stored in both
even and odd comparand register pairs selected
by the Comparand Register Index in the com-
mand
’
s Cycle B. In a x68 configuration, only the
even comparand register can subsequently be
used by the LEARN command. The word K (pre-
sented on the DQ Bus in both Cycles A and B of
the command) is compared with each entry in the
table, starting at location
“
0.
”
The first matching
entry
’
s location, address
“
L,
”
is the winning ad-
dress that is driven as part of the SRAM address
on the SADR[21:0] lines.
Figure 26. x68 Table with One Device
Comparand Register (even)
K
Comparand Register (odd)
K
67
0
CFG = 00000000
(68-bit Configuration)
0
1
2
3
16383
Location
address
L
67
0
K
GMR
67
0
AI07041
(First matching entry)
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