參數(shù)資料
型號： CYNSE70064A-50BGC
廠商： CYPRESS SEMICONDUCTOR CORP
元件分類： 通信及網(wǎng)絡(luò)
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(shù)： 72/127頁
文件大?。?/td> 3275K
代理商： CYNSE70064A-50BGC
CYNSE70064A
Document #: 38-02041 Rev. *E
Page 72 of 127
10.13
The hardware diagram of the Search subsystem of eight devices is shown in
Figure 10-52
. The following are the parameters
programmed in the eight devices.
First seven devices (devices 0–6): CFG = 10101010, TLSZ = 01, HLAT = 000, LRAM = 0, and LDEV = 0.
Eighth device (device 7): CFG = 10101010, TLSZ = 01, HLAT = 000, LRAM = 1, and LDEV = 1.
Note
. All eight devices must be programmed with the same value of TLSZ and HLAT. Only the last device in the table must be
programmed with LRAM = 1 and LDEV = 1 (device number 7 in this case). All other upstream devices must be programmed with
LRAM = 0 and LDEV = 0 (devices 0 through 6 in this case).
Figure 10-53
shows the timing diagram for a Search command in the 272-bit-configured table of eight devices for device
number 0.
Figure 10-54
shows the timing diagram for a Search command in the 272-bit-configured table of eight devices for
device number 1.
Figure 10-55
shows the timing diagram for a Search command in the 272-bit-configured table of eight devices
for device number 7 (the last device in this specific table). For these timing diagrams three 272-bit searches are performed
sequentially. The following Hit/Miss assumptions were made as shown in
Table 10-28
.
Table 10-28. Hit/Miss Assumption
Search Number
1
Device 0
Hit
Device 1
Miss
Devices 2–6
Miss
Device 7
Miss
272-bit Search on Tables x272-configured Using up to Eight CYNSE70064A Devices
2
3
Miss
Hit
Miss
Miss
Miss
Miss
Miss
Miss
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參數(shù)描述
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