- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄369679 > CYNSE70256 Network Processing PDF資料下載
參數(shù)資料
| 型號(hào)： | CYNSE70256 |
| 英文描述： | Network Processing |
| 中文描述： | 網(wǎng)絡(luò)處理 |
| 文件頁(yè)數(shù)： | 76/126頁(yè) |
| 文件大小： | 3302K |
| 代理商： | CYNSE70256 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)當(dāng)前第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)
CYNSE70032
Document #: 38-02042 Rev. *E
Page 76 of 126
The logical 272-bit Search operation is shown in
Figure 13-52
. The entire table of 272-bit entries is compared to a 272-bit word
K that is presented on the DQ bus in cycles A, B, C, and D of the command using the GMR and the local mask bits. The GMR is
the 272-bit word specified by the two pairs of GMRs selected by the GMR Indexes in the command’s cycles A and C in each of
the eight devices. The 272-bit word K that is presented on the DQ bus in cycles A, B, C, and D of the command is compared to
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[21:0] lines (see “SRAM Addressing” on page 98).
Note
. The matching address is always
going to be a location 0 in a four-entry page for 272-bit Search (two LSBs of the matching index will be 00).
271
The Search command is a pipelined operation and executes a Search at one-fourth the rate of the frequency of CLK2X for 272-bit
searches in ×272-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 13-20
.
Search latency from command to SRAM access cycle is 5 for only a single device in the table and TLSZ = 01. In addition, SSV
and SSF shift further to the right for different values of HLAT, as specified in
Table 13-21
.
13.9
The hardware diagram of the search subsystem of 31 devices is shown in
Figure 13-53
. Each of the four blocks in the diagram
represents a block of eight CYNSE70032 devices, except the last which has seven devices. The diagram for a block of eight
devices is shown in
Figure 13-54
. The following are the parameters programmed into the 31 devices.
First thirty devices (devices 0–29): CFG = 10101010, TLSZ = 10, HLAT = 000, LRAM = 0, and LDEV = 0.
Thirty-first device (device 30): CFG = 10101010, TLSZ = 10, HLAT = 000, LRAM = 1, and LDEV = 1.
272-bit Search on Tables Configured as ×272 using up to 31 CYNSE70032 Devices
Table 13-20. Search Latency from Instruction to SRAM Access Cycle
Number of Devices
1 (TLSZ = 00)
1–8 (TLSZ = 01)
1–31 (TLSZ = 10)
Max Table Size
4K × 272 bits
32K × 272 bits
124K × 272 bits
Latency in CLK Cycles
4
5
6
Table 13-21. Shift of SSF and SSV from SADR
HLAT
000
001
010
011
100
101
110
111
Number of CLK Cycles
0
1
2
3
4
5
6
7
CFG = 10101010
(272-bit configuration)
271
0
Location
address
0
4
8
12
131068
K
GMR
0
L
A
B
0
1
C
D
2
3
(First matching entry)
Must be same in each of the eight
devices
Figure 13-52. x272 Table with Eight Devices
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CZET101 | Clock Driver |
| CZEU101 | Quad Peripheral Driver |
| CZEZ101 | Triple Peripheral Driver |
| CZSP103 | Voltage Reference |
| CZT122 | TRANSISTOR | BJT | DARLINGTON | NPN | 100V V(BR)CEO | 5A I(C) | SOT-223 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CYNSE70256-66BGC | 制造商:Cypress Semiconductor 功能描述: |
| CYNSE70256-66BHC | 制造商:Cypress Semiconductor 功能描述:COMMUNICATIONS, NETWORK SEARCH ENGINE - Trays |
| CYONS10017-LBXC | 制造商:Cypress Semiconductor 功能描述: |
| CYONS1001G-LBXC | 制造商:Cypress Semiconductor 功能描述: 制造商:Rochester Electronics LLC 功能描述: |
| CYONS1001L | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:OvationONS⑩ 1L - Laser Navigation Sensor |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。