參數資料
型號: CYNSE70064A-83BGC
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類: 通信及網絡
英文描述: Search Engine
中文描述: SPECIALTY TELECOM CIRCUIT, PBGA272
封裝: 27 X 27 MM, 2.33 MM HEIGHT, PLASTIC, BGA-272
文件頁數: 98/127頁
文件大?。?/td> 3275K
代理商: CYNSE70064A-83BGC
CYNSE70064A
Document #: 38-02041 Rev. *E
Page 98 of 127
11.1
Figure 11-1
shows how up to eight devices can be cascaded to form 256K × 68, 128K × 136, or 64K × 272 tables. It also shows
the interconnection between the devices for depth-cascading. Each Search engine asserts the LHO[1] and LHO[0] signals to
inform downstream devices of its result. The LHI[6:0] signals for a device are connected to LHO signals of the upstream devices.
The host ASIC must program the TLSZ to 01 for each of up to eight devices in a block. Only a single device drives the SRAM
bus in any single cycle.
Depth-Cascading up to Eight Devices (One Block)
LHO[0]
6
5
4
3
2
1
0
LHI
LHO[0]
6
5
3
2
1
0
LHI
LHO[1]
6
5
4
3
2
1
0
LHI
LHO[0]
LHO[0]
6
5
4
3
2
1
0
LHI
LHO[0]
6
5
4
3
2
1
0
LHI
LHO[0]
6
5
4
3
2
LHI
1
0
LHO[0]
6
5
LHI
4
3
2
LHI
1
0
LHI
BHO[0]
BHO[1]
BHO[2]
6
5
4
3
2
1
0
LHI
LHO[1]
LHO[1]
LHO[1]
BHO[0]
BHO[1]
BHO[2]
BHI[2:0]
BHI[2:0]
BHI[2:0]
BHI[2:0]
BHI[2:0]
BHI[2:0]
BHI[2:0]
BHI[2:0]
DQ[67:0]
CMDV
CMD[8:0]
SRAM
LHO[1] LHO[0]
CYNSE70064A #0
CYNSE70064A #1
CYNSE70064A #2
CYNSE70064A #3
CYNSE70064A #4
CYNSE70064LHI
CYNSE70064A #6
CYNSE70064A #7
4
SSF, SSV
Figure 11-1. Depth-Cascading to Form a Single Block
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