CYNSE70032
Document #: 38-02042 Rev. *E
Page 24 of 126
13.0
Search Command
This subsection will describe the following searches.
• 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.
13.1
68-bit Search on Tables Configured as ×68 using a Single CYNSE70032 Device
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.
cycle
CLK2X
CMDV
CMD[1:0]
DQ
CE_L
OE_L
Hit
Hit
Miss
Miss
CMD[8:2]
Search2
Search4
WE_L
1
cycle
2
cycle
3
cycle
4
cycle
5
cycle
6
cycle
7
cycle
8
cycle
9
cycle
10
CFG = 00000000, HLAT = 000, TLSZ = 00, LRAM = 1, LDEV = 1.
PHS_L
SADR[21:0]
SSF
SSV
ALE_L
Search1
Search2
Search3
Search4
D1
D2
D3
D4
A1
A3
01
01
01
01
Search1
Search3
A B A B A B A B
0
1
0
0
1
1
0
1
1
0
0
0
1
0
1
1
0
1
1
0
0
0
1
0
0
1
1
1
Figure 13-1. Timing Diagram for 68-bit Search in ×68 Table (One Device)
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