參數(shù)資料
型號(hào): M7040N-066ZA1T
廠商: 意法半導(dǎo)體
英文描述: CAP 0.01PF 50V 10% X7R AXIAL BULK P-MIL-PRF-39014
中文描述: 64K的× 72位的網(wǎng)絡(luò)數(shù)據(jù)包進(jìn)入搜索引擎
文件頁數(shù): 39/159頁
文件大?。?/td> 1088K
代理商: M7040N-066ZA1T
39/159
M7040N
The logical 72-bit SEARCH operation is shown in
Figure 24, page 41. The entire table consisting of
72-bit entries is compared to a 72-bit word K (pre-
sented 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 72-bit word speci-
fied by the identical value in both even and odd
GMR pairs selected by the GMR Index in the com-
mand
s Cycle A. The 72-bit word K (presented on
the DQ Bus in both Cycles A and B of the com-
mand) is also stored in both even and odd com-
parand register pairs selected by the Comparand
Register Index in the command
s Cycle B. In a x72
configuration, only the even comparand register
can be subsequently used by the LEARN com-
mand. The word K (presented 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 address that is driven as part of the
SRAM address on the SADR[23:0] lines (see
SRAM ADDRESSING, page 128).
The SEARCH command is a pipelined operation
and executes a SEARCH at half the rate of the fre-
quency of CLK2X for 72-bit searches in x72-con-
figured tables. The latency of SADR, CE_L,
ALE_L, WE_L, SSV, and SSF from the 72-bit
SEARCH command cycle (two CLK2X cycles) is
shown in Table 26, page 41.
The latency of a SEARCH from command to
SRAM access cycle is 4 for a single device in the
table and TLSZ = 00. In addition, SSV and SSF
shift further to the right for different values of
HLAT, as specified in Table 27, page 41.
Figure 22. Hardware Diagram for a Table with One Device
DQ[71:0]
CMDV, CMD[10:0]
SSF, SSV
SRAM
BHI[2:0]
BHI[2:0]
LHO[1]
3
2
1
0
M7040
LHO[0]
6
5
4
AI04677
相關(guān)PDF資料
PDF描述
M7040N-083ZA1T CAP 5600PF 100V 10% X7R AXIAL BULK P-MIL-PRF-39014
M7040N-100ZA1T 64K x 72-bit Entry NETWORK PACKET SEARCH ENGINE
M708 PCM REMOTE CONTROL TRANSMITTER
M708A PCM REMOTE CONTROL TRANSMITTER
M708B1 PCM REMOTE CONTROL TRANSMITTER
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M7040N-100ZA1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:64K x 72-bit Entry NETWORK PACKET SEARCH ENGINE
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