cynse70032 Cypress Semiconductor Corporation., cynse70032 Datasheet - Page 24

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

13.0
This subsection will describe the following searches.
13.1
Figure 13-1 shows the timing diagram for a Search command in a 68-bit-configured table (CFG = 00000000) consisting of a single
device for one set of parameters: TLSZ = 00, HLAT = 000, LRAM = 1, and LDEV = 1. The hardware diagram for this Search
subsystem is shown in Figure 13-2.
Document #: 38-02042 Rev. *E
CFG = 00000000, HLAT = 000, TLSZ = 00, LRAM = 1, LDEV = 1.
• 68-bit Search on tables configured as ×68 using one device
• 68-bit Search on tables configured as ×68 using up to eight devices
• 68-bit Search on tables configured as ×68 using up to 31 devices
• 136-bit Search on tables configured as ×136 using one device
• 136-bit Search on tables configured as ×136 using up to eight devices
• 136-bit Search on tables configured as ×136 using up to 31 devices
• 272-bit Search on tables configured as ×272 using one device
• 272-bit Search on tables configured as ×272 using up to eight devices
• 272-bit Search on tables configured as ×272 using up to 31 devices
• Mixed-size searches on tables configured with different widths using an CYNSE70032.
68-bit Search on Tables Configured as
Search Command
SADR[21:0]
CMD[1:0]
CMD[8:2]
CLK2X
PHS_L
ALE_L
CMDV
WE_L
OE_L
CE_L
SSV
SSF
DQ
Figure 13-1. Timing Diagram for 68-bit Search in ×68 Table (One Device)
1
1
1
0
0
0
cycle
Search1
A B A B A B A B
1
D1
01
cycle
Search2
2
D2
01
cycle
Search3
3
D3
01
×
68 using a Single CYNSE70032 Device
cycle
Search4
4
D4
01
Search1
cycle
Hit
5
A1
0
1
0
0
1
Search2
cycle
Miss
6
1
1
1
0
0
1
Search3
cycle
Hit
7
A3
0
0
1
0
1
Search4
Miss
cycle
8
cycle
9
1
1
1
0
0
0
cycle
10
CYNSE70032
Page 24 of 126