參數(shù)資料
型號： M7020R-066ZA1T
廠商： 意法半導(dǎo)體
英文描述： 32K x 68-bit Entry NETWORK SEARCH ENGINE
中文描述： 32K的× 68位進(jìn)入網(wǎng)絡(luò)搜索引擎
文件頁數(shù)： 27/150頁
文件大?。?/td> 996K
代理商： M7020R-066ZA1T
27/150
M7020R
SEARCH ENGINE ARCHITECTURE
The M7020R consists of 32K x 68-bit storage cells
referred to as data bits. There is a mask cell corre-
sponding to each data cell. Figure 12 shows the
three organizations of the device based on the val-
ue of the CFG bits in the command register.
During a SEARCH operation, the search data bit
(S), data array bit (D), mask array bit (M) and the
global mask bit (G) are used in the following man-
ner to generate a match at that bit position (see
Table 15, page 28).
The entry with all matched bit positions results in a
successful search during a SEARCH operation.
In order for a successful search within a device to
make the device the local winner in the SEARCH
operation, all 68-bit positions must generate a
match for a 68-bit entry in 68-bit-configured quad-
rants, or all 136-bit positions must generate a
match for two consecutive even and odd 68-bit en-
tries in quadrants configured as 136 bits, or all
272-bit positions must generate a match for 4 con-
secutive entries aligned to 4 entry-page bound-
aries of 68-bit entries in quadrants configured as
272 bits.
An arbitration mechanism using a cascade bus de-
termines the global winning device among the lo-
cal winning devices in a SEARCH cycle. The
global winning device drives the SRAM Bus, SSV,
and the SSF signals. In case of a SEARCH failure,
the devices with the LDEV and LRAM bits set
drive(s) the SRAM Bus, SSF, and SSV signals.
The M7020R device can be configured to contain
tables of different widths, even within the same
chip. Figure 13, page 28 shows a sample configu-
ration of different widths.
Data and Mask Addressing
Figure 14, page 28 shows the M7020R data array
and mask array addressing procedure.
Figure 12. M7020R Database Width Configuration
D
Data
Data
M
Masks
Masks
32 K
CFG = 00000000
CFG = 01010101
CFG = 10101010
68
136
272
16 K
8 K
AI04279
相關(guān)PDF資料
PDF描述
M7020R-083ZA1T 32K x 68-bit Entry NETWORK SEARCH ENGINE
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M7020R-083ZA1T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:32K x 68-bit Entry NETWORK SEARCH ENGINE
M702-230442 功能描述:火線接頭 IEEE 1394 SMT 4P HORIZONTAL RoHS:否 制造商:Molex 產(chǎn)品:IEEE 1394 Firewire Connectors 標(biāo)準(zhǔn):IEEE 1394 位置/觸點(diǎn)數(shù)量:6 節(jié)距:2 mm 觸點(diǎn)電鍍:Unplated 觸點(diǎn)材料:Phosphor Bronze 型式:Female 電流額定值:0.5 A 安裝風(fēng)格:Through Hole 端接類型:Solder Tab 連接器類型:Firewire Receptacle
M702-230642 功能描述:火線接頭 IEEE 1394 SMT 6P HORIZONTAL RoHS:否 制造商:Molex 產(chǎn)品:IEEE 1394 Firewire Connectors 標(biāo)準(zhǔn):IEEE 1394 位置/觸點(diǎn)數(shù)量:6 節(jié)距:2 mm 觸點(diǎn)電鍍:Unplated 觸點(diǎn)材料:Phosphor Bronze 型式:Female 電流額定值:0.5 A 安裝風(fēng)格:Through Hole 端接類型:Solder Tab 連接器類型:Firewire Receptacle
M7023 制造商:Tamura Corporation of America 功能描述:
M7027 功能描述:數(shù)字萬用表 Dual Display Multime 0.3% Accuracy RoHS:否 制造商:Tektronix 產(chǎn)品:Multimeters 類型:Bench 準(zhǔn)確性:0.04 % 電壓范圍:2 V to 2 kV 電阻范圍: 電容范圍: 顯示計(jì)數(shù): 頻率:10 Hz to 45 Hz, 850 Hz to 1 MHz 測距: 真均方根值: 數(shù)據(jù)保持:
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