cynse70032 Cypress Semiconductor Corporation., cynse70032 Datasheet - Page 48

• Manufacturer Part Number: cynse70032
• Description: Network Search Engine
• Manufacturer: Cypress Semiconductor Corporation.

13.5
The hardware diagram of the Search subsystem of eight devices is shown in Figure 13-26. The following are parameters
programmed into the eight devices.
Note
number 7 in this case) must be programmed with LRAM = 1 and LDEV = 1. All other upstream devices (devices 0 through 6 in
this case) must be programmed with LRAM = 0 and LDEV = 0.
Figure 13-27 shows the timing diagram for a Search command in the 136-bit-configured table of eight devices for device
number 0. Figure 13-28 shows the timing diagram for a Search command in the 136-bit-configured table consisting of eight
devices for device number 1. Figure 13-29 shows the timing diagram for a Search command in the 136-bit configured table
consisting of eight devices for device number 7 (the last device in this specific table). For these timing diagrams, four 136-bit
searches are performed sequentially, and the following Hit/Miss assumptions were made (see Table 13-11).
Table 13-11. Hit/Miss Assumptions
Document #: 38-02042 Rev. *E
• First seven devices (devices 0–6): CFG = 01010101, TLSZ = 01, HLAT = 010, LRAM = 0, and LDEV = 0.
• Eighth device (device 7): CFG = 01010101, TLSZ = 01, HLAT = 010, LRAM = 1, and LDEV = 1.
. All eight devices must be programmed with the same value of TLSZ and HLAT. Only the last device in the table (device
Search Number
Device 2–6
136-bit Search on Tables Configured as ×136 Using up to Eight CYNSE70032 Devices
Device 0
Device 1
Device 7
Miss
Miss
Miss
Hit
1
Miss
Miss
Miss
Hit
2
Miss
Hit
Hit
Hit
3
CYNSE70032
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Miss
Miss
Miss
Hit
4