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M7020R Datasheet(PDF) 93 Page - STMicroelectronics

Part # M7020R
Description  32K x 68-bit Entry NETWORK SEARCH ENGINE
PDF  150 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M7020R Datasheet(HTML) 93 Page - STMicroelectronics

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M7020R
The SEARCH command is a pipelined operation
and executes search at one-fourth the rate of the
frequency of CLK2X for 272-bit searches in x272-
configured tables. The latency of SADR, CE_L,
ALE_L, WE_L, SSV, and SSF from the 272-bit
SEARCH command (measured in CLK cycles)
from the CLK2X cycle that contains the C and D
Cycles is shown in Table 44, page 99.
The latency of search from command to SRAM ac-
cess cycle is 5 for only a single device in the table
and TLSZ = 01. In addition, SSV and SSF shift fur-
ther to the right for different values of HLAT, as
specified in Table 45, page 99.
Table 43. Hit/Miss Assumption
Search Number
1
2
3
Device 0
Hit
Miss
Miss
Device 1
Miss
Hit
Miss
Device 2-6
Miss
Miss
Miss
Device 7
Miss
Miss
Miss



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