CYNSE70064A-50BGC Cypress Semiconductor Corp, CYNSE70064A-50BGC Datasheet - Page 25

• Manufacturer Part Number: CYNSE70064A-50BGC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYNSE70064A-50BGC

• Operating Supply Voltage (typ): 1.8/2.5/3.3V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Package Type: BGA
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

.The logical 68-bit Search operation is shown in Figure 10-7. The entire table consisting of 68-bit entries is compared to a 68-bit
word K (presented on the DQ bus in both cycles A and B of the command) using the GMR and the local mask bits. The effective
GMR is the 68-bit word specified by the identical value in both even and odd GMR pairs selected by the GMR Index in the
command’s cycle A.
The 68-bit word K (presented on the DQ bus in both cycles A and B of the command) is also stored in both even and odd
comparand register pairs selected by the Comparand Register Index in the command’s cycle B. In a ×68 configuration, only the
even comparand register can be subsequently used by the Learn command. The word K (presented on the DQ bus in both cycles
A and B of the command) is compared with each entry in the table starting at location 0. The first matching entry’s location address
L is the winning address that is driven as part of the SRAM address on the SADR[21:0] lines (See “SRAM Addressing” on
page 101.)
Document #: 38-02041 Rev. *F
SADR[21:0]
CMD[1:0]
CMD[8:2]
CFG = 00000000, HLAT = 000, TLSZ = 00, LRAM = 1, LDEV = 1.
CLK2X
PHS_L
ALE_L
CMDV
WE_L
OE_L
CE_L
SSV
SSF
Figure 10-6. Timing Diagram for 68-bit Search in
DQ
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
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
x
cycle
68 Table (One Device)
Hit
7
A3
0
0
1
0
1
Search4
Miss
cycle
8
cycle
9
1
1
1
0
0
0
cycle
10
CYNSE70064A
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