CYNSE70256-66BHC Cypress Semiconductor Corp, CYNSE70256-66BHC Datasheet - Page 46

• Manufacturer Part Number: CYNSE70256-66BHC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYNSE70256-66BHC

• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Package Type: BGA
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

The following is the sequence of operation for a single 144-bit Search command (also see Subsection 10.2, “Commands and
Command Parameters,” on page 19).
Document #: 38-02035 Rev. *E
CFG = 0101010101010101, HLAT = 010, TLSZ = 01, LRAM = 0, LDEV = 0.
Note: |(LHI[6:0]) stands for the boolean ‘OR’ of the entire bus LHI[6:0].
Note: |LHO[1:0] is logical “or” of LHO[0] and LHO[1].
• Cycle A: The host ASIC drives CMDV HIGH and applies Search command code (10) on CMD[1:0] signals. {CMD[10],CMD[5:3]}
• Cycle B: The host ASIC continues to drive CMDV HIGH and to apply Search command code (10) on CMD[1:0]. CMD[5:2]
signals must be driven with the index to the GMR pair for use in this Search operation. CMD[8:6] signals must be driven with
the same bits that will be driven by this device on SADR[23:21] if it has a hit. DQ[71:0] must be driven with the 72-bit data
([143:72]) in order to be compared against all even locations. The CMD[2] signal must be driven to logic 0.
must be driven by the index of the comparand register pair for storing the 144-bit word presented on the DQ bus during cycles
A and B. CMD[8:6] signals must be driven with the SSR index that will be used for storing the address of the matching entry
and the hit flag (see page 14 for the description of SSR[0:7]). The DQ[71:0] is driven with 72-bit data ([71:0]) compared against
all odd locations.
SADR[23:0]
CMD[10:2]
PHS_L
CMD[1:0]
|(LHI[6:0])
|LHO[1:0]
CMDV
ALE_L
CLK2X
Figure 10-27. Timing Diagram for 144-bit Search Device Number 7 (Last Device)
OE_L
CE_L
WE_L
SSF
SSV
DQ
0
0
0
0
1
0
cycle
Search1
A B A B A B A B
1
A B A B A B A B
01
D1
cycle
Search2
2
01
D2
cycle
Search3
3
01
D3
cycle
4
Search4
01
D4
cycle
5
cycle
6
cycle
7
z
z
Search1
(Miss on
this device.)
z
cycle
8
Search2
(Miss on
this device.)
cycle
9
A4
z
z
Search3
(Local but
not global
winner.)
cycle
10
1
0
0
Search4
(Global
winner.)
1
1
CYNSE70256
0
0
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