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參數(shù)資料
| 型號： | M7010R |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | 16K x 68-bit Entry NETWORK SEARCH ENGINE |
| 中文描述： | 16K的× 68位進(jìn)入網(wǎng)絡(luò)搜索引擎 |
| 文件頁數(shù)： | 41/67頁 |
| 文件大小： | 449K |
| 代理商： | M7010R |
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M7010R
136-bit Logical SEARCH
The logical, 136-bit SEARCH operation is shown
in Figure 29. The entire table of 136-bit entries is
compared to a 136-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 GMR
is the 136-bit word specified by the even and odd
global mask pair selected by GMR Index in the
command
’
s Cycle A. The 136-bit word K (present-
ed 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 Com-
parand Register Index in the command
’
s Cycle B.
The two comparand registers can subsequently
be used by the LEARN command with the even-
numbered comparand register stored in an even-
numbered location, and the odd-numbered com-
parand register stored in an adjacent, odd-num-
bered location. The word K (presented on the DQ
Bus in Cycles A and B of the command) is com-
pared with each entry in the table starting at loca-
tion
“
0.
”
The first matching entry
’
s location,
address
“
L,
”
is the winning address that is driven
as part of the SRAM address on the SADR[21:0]
lines.
Note:
The matching address is always going to be
an
even-numbered
address
SEARCH.
for
a
136-bit
Figure 29. x136 Table with One Device
Comparand Register (even)
A
Comparand Register (odd)
B
67
0
CFG = 01010101
(136-bit Configuration)
0
2
4
6
16382
Location
address
L
135
0
K
A
B
GMR
Even
Odd
135
0
AI07042
(First matching entry)
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