CYNSE70064A-50BGC Cypress Semiconductor Corp, CYNSE70064A-50BGC Datasheet - Page 91

• 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 following is the sequence of operation for a single 272-bit Search command (also refer to Subsection 10.2, “Commands and
Command Parameters” on page 19).
Note. For 272-bit searches, the host ASIC must supply four distinct 68-bit data words on DQ[67:0] during cycles A, B, C, and D.
The GMR Index in cycle A selects a pair of GMRs in each of the 31 devices that apply to DQ data in cycles A and B. The GMR
Index in cycle C selects a pair of GMRs in each of the 31 devices that apply to DQ data in cycles C and D.
Document #: 38-02041 Rev. *F
CFG = 10101010, HLAT = 000, TLSZ = 10, LRAM = 1, LDEV = 1.
Note: |(BHI[2:0]) stands for the boolean ‘OR’ of the entire bus BHI[2:0].
Note: |(LHI[6:0]) stands for the boolean ‘OR’ for the entire bus LHI[6:0].
Note: Each bit in BHO[2:0] is the same logical signal.
Note: Each bit in LHO[1:0] is the same logical signal.
• Cycle A: The host ASIC drives the CMDV HIGH and applies Search command code (10) on CMD[1:0] signals. CMD[5:3]
• Cycle B: The host ASIC continues to drive the CMDV HIGH and applies Search command (10) on CMD[1:0]. The DQ[67:0]
• Cycle C: The host ASIC drives the CMDV HIGH and applies Search command code (10) on CMD[1:0] signals. CMD[5:3]
• Cycle D: The host ASIC continues to drive the CMDV HIGH and continues to apply Search command code (10) on CMD[1:0].
signals must be driven with the index to the GMR pair used for bits [271:136] of the data being searched. DQ[67:0] must be
driven with the 68-bit data ([271:204])to be compared to all locations 0 in the four 68-bits-word page. The CMD[2] signal must
be driven to logic 1. Note. CMD[2] = 1 signals that the Search is a ×272-bit Search. CMD[8:7] is ignored in this cycle.
is driven with the 68-bit data ([203:136]) to be compared to all locations 1 in the four 68-bits-word page.
signals must be driven with the index to the GMR pair used for the bits [135:0] of the data being searched. CMD[8:7] signals
must be driven with the bits that will be driven by this device on SADR[21:20] if it has a hit. DQ[67:0] must be driven with the
68-bit data ([135:68]) to be compared to all locations 2 in the four 68-bits-word page. The CMD[2] signal must be driven to logic 0.
CMD[8:6] signals must be driven with the index of the SSR that will be used for storing the address of the matching entry and
the hit flag (see page 14 for a description of SSR[0:7]). The DQ[67:0] is driven with the 68-bit data ([67:0]) to be compared to
all locations 3 in the four 68-bits-word page. CMD[5:2] is ignored because the Learn instruction is not supported for x272 tables.
SADR[21:0]
CMD[2]
CMD[8:2]
|(LHI[6:0)]
I(BHI[2:0])
CMD[1:0]
LHO[1:0]
Figure 10-69. Timing Diagram of the Last Device in Block Number 3 (Device 30 in the Table)
BHO[2:0]
CE_L
ALE_L
PHS_L
CMDV
OE_L
WE_L
CLK2X
SSV
DQ
SSF
0
0
0
0
0
0
1
0
0
0
cycle
A B A B A B A B
A B C D A B C D
1
Search1
cycle
01
D1
2
cycle
3
Search2
D2
cycle
01
4
cycle
A B A B
A B C D
5
Search3
D3
cycle
01
6
cycle
(Hit on some
device above.)
7
Search1
cycle
8
z
z
z
z
z
z
cycle
9
0
0
1
0
0
(Hit on some
device above.)
Search2
cycle
10
z
z
z
z
z
z
0
0
1
0
0
(Hit on some
device above.)
CYNSE70064A
Search3
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