CYNSE70064A-66BGC Cypress Semiconductor Corp, CYNSE70064A-66BGC Datasheet - Page 24

• Manufacturer Part Number: CYNSE70064A-66BGC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYNSE70064A-66BGC

• Operating Supply Voltage (typ): 1.8V
• Operating Supply Voltage (min): 1.7V
• Operating Supply Voltage (max): 1.9V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Package Type: BGA
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

10.5
This subsection describes the following:
10.6
Figure 10-6 shows the timing diagram for a Search command in the 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 10-5.
The following is the sequence of operation for a single 68-bit Search command (also refer to Command and Command Param-
eters, Subsection 10.2 on page 19).
Note. For 68-bit searches, the host ASIC must supply the same 68-bit data on DQ[67:0] during both cycles A and B. The even
and odd pair of GMRs selected for the compare must be programmed with the same value.
Document #: 38-02041 Rev. *F
• 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 CYNSE70064A.
• 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 to apply Search command (10) on CMD[1:0]. CMD[5:2] must
signals must be driven with the index to the GMR pair for use in this Search operation. CMD[8:7] signals must be driven with
the same bits that will be driven on SADR[21:20] by this device if it has a hit. DQ[67:0] must be driven with the 68-bit data to
be compared. The CMD[2] signal must be driven to logic 0.
be driven by the index of the comparand register pair for storing the 136-bit word presented on the DQ bus during cycles A
and B. 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 information on SSR[0:7]). The DQ[67:0] continues to carry the 68-bit data to be compared.
Search Command
68-bit Search on Tables Configured as ×68 using a Single CYNSE70064A Device
DQ[67:0]
CMDV, CMD8:0]
SSF, SSV
Figure 10-5. Hardware Diagram for 68-bit Search in
BHI[2:0]
BHI[2:0]
LHO[1]
CYNSE70064A
6
5
4
LHI
x
3
68 Table (One Device)
2
1
LHO[0]
0
CYNSE70064A
SRAM
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