KE5BLME064 View Datasheet(PDF) - KAWASAKI MICROELECTRONICS
Part Name
Description
MFG CO.
'KE5BLME064' PDF : 53 Pages View PDF
Kawasaki LSI
64K Longest Match Search Engine (KE5BLME064)
PRELIMINARY
4.6. Data Deletion
To delete data from the table, use the Delete command. Ensure that the IP address is
set to WR0-2, and PL to WR2 with a prefix-length minus 1 before executing the
commands.
Example:
If deleting 0.192.1.2.0/32, set the registers as follows.
WR0: IP[15:0]
WR1: IP[31:16]
WR2: 2’bxx, PL[5:0], IP[39:32]
0200h (2.0)
C001h (192.1)
1F00h (31=32-1.0)
The completion of the Delete command will be confirmed by a low status of CCMPN pin.
Before proceeding with the subsequent commands, check anew to confirm that the
Delete command execution has finished.
Actually, the data is acknowledged as the deleted data of the search table within 20
clocks after the Delete command is issued and the Entry Counter is decreased before
the completion of the Delete command.
Notes:
l Ensure that the value set to WR2 is the prefix-length minus 1, not the prefix-
length itself. No deletion can be performed if the value entered to WR2 differs
from that of the initial entry, that is the prefix-length minus 1, and the Entry
Counter is not decreased.
l Even if the signal of the CCMPN pin becomes low level on the completion of
the Delete command, no deletion can be performed if the value entered to
WR0-2 differs from that of the search table entry and the Entry Counter is not
decreased.
l These status are known as the value of STAT1 register.
4.7. Data Insertion/Deletion Rate
The maximum Insertion rate is about 400k entries per second (at 66Mhz system clock
operation) after the Initialize command is executed. This rate is performed on the
condition that each new IP address data is sequentially inserted from the small one to
Version 2.5.4
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