參數(shù)資料
型號： M7040N
廠商： 意法半導(dǎo)體
英文描述： 64K x 72-bit Entry NETWORK PACKET SEARCH ENGINE
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)： 64/159頁
文件大?。?/td> 1088K
代理商： M7040N
M7040N
64/159
Table 32. Latency of SEARCH from Instruction to SRAM Access Cycle
Table 33. Shift of SSF and SSV from SADR
144-bit Configuration with Single Device
The hardware diagram for this search subsystem
is shown in Figure 44.
Figure 45, page 66 shows the timing diagram for a
SEARCH command in the 144-bit-configured ta-
ble (CFG = 0101010101010101) consisting of a
single device for one set of parameters. This illus-
tration assumes that the host ASIC has pro-
grammed TLSZ to '00,' HLAT to '001,' LRAM to '1,'
and LDEV to '1.'
The following is the operation sequence for a sin-
gle 144-bit SEARCH command (refer to COM-
MAND CODES AND PARAMETERS, page 30).
–
Cycle A:
The host ASIC drives the CMDV high
and applies SEARCH command code ('10') to
CMD[1:0] signals. {CMD[10],CMD[5:3]} signals
must be driven with the index to the GMR pair
for use in this SEARCH operation. CMD[8:6]
signals must be driven with the same bits that
will be driven on SADR[23:21] by this device if it
has a hit. DQ[71:0] must be driven with the 72-
bit data ([143:72]) to be compared against all
even locations. The CMD[2] signal must be driv-
en to logic '0.'
–
Cycle B:
The host ASIC continues to drive the
CMDV high and applies the command code of
SEARCH
command
CMD[5:2] must be driven by the index of the
comparand register pair for storing the 144-bit
word presented on the DQ Bus during Cycles A
and B. CMD[8:6] signals must be driven with the
index of the SSR that will be used for storing the
address of the matching entry and Hit Flag (see
SEARCH-Successful
page 24). The DQ[71:0] is driven with 72-bit
data ([71:0]), compared to all odd locations.
Note:
For 144-bit searches, the host ASIC must
supply two distinct 72-bit data words on
DQ[71:0] during Cycles A and B. The even-
numbered GMR of the pair specified by the
GMR Index is used for masking the word in Cy-
cle A. The odd-numbered GMR of the pair spec-
ified by the GMR Index is used for masking the
word in Cycle B.
('10')
on
CMD[1:0].
Registers
(SSR[0:7]),
# of devices
Max Table Size
Latency in CLK Cycles
1 (TLSZ = 00)
64K x 72-bit
4
1
–
8 (TLSZ = 01)
512K x 72-bit
5
1
–
31 (TLSZ = 10)
1984K x 72-bit
6
HLAT
Number of CLK Cycles
000
0
001
1
010
2
011
3
100
4
101
5
110
6
111
7
相關(guān)PDF資料
PDF描述
M7040N-066ZA1T CAP 0.01PF 50V 10% X7R AXIAL BULK P-MIL-PRF-39014
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M7040N-066ZA1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:64K x 72-bit Entry NETWORK PACKET SEARCH ENGINE
M7040N-083ZA1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:64K x 72-bit Entry NETWORK PACKET SEARCH ENGINE
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
M7041 制造商:Tamura Corporation of America 功能描述:
M7045 制造商:Tamura Corporation of America 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*