CYNSE70064A-66BGC Cypress Semiconductor Corp, CYNSE70064A-66BGC Datasheet - Page 55

• 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

10.11
The hardware diagram of the Search subsystem of 31 devices is shown in Figure 10-35. Each of the four blocks in the diagram
represents a block of eight CYNSE70064A devices (except the last, which has seven devices). The diagram for a block of eight
devices is shown in Figure 10-36. Following are the parameters programmed into the 31 devices.
Note. All 31 devices must be programmed with the same value of TLSZ and HLAT. Only the last device in the table must be
programmed with LRAM = 1 and LDEV = 1 (device number 30 in this case). All other upstream devices must be programmed
with LRAM = 0 and LDEV = 0 (devices 0 through 29 in this case).
The timing diagrams referred to in this paragraph reference the Hit/Miss assumptions defined in Table 10-23. For the purpose of
illustrating timings, it is further assumed that the there is only one device with a matching entry in each of the blocks. Figure 10-37
shows the timing diagram for a Search command in the 136-bit-configured table (31 devices) for each of the eight devices in
block number 0. Figure 10-38 shows the timing diagram for Search command in the 68-bit-configured table (31 devices) for all
the devices in block number 1 above the winning device in that block. Figure 10-39 shows the timing diagram for the globally
winning device (the final winner within its own block and all blocks) in block number 1. Figure 10-40 shows the timing diagram
for all the devices below the globally winning device in block number 1. Figure 10-41, Figure 10-42, and Figure 10-43 respectively
show the timing diagrams of the devices above globally winning device, the globally winning device and devices below the globally
winning device for block number 2. Figure 10-44, Figure 10-45, Figure 10-46, and Figure 10-47 respectively show the timing
diagrams of the devices above the globally winning device, the globally winning device, and devices below the globally winning
device except the last device (device 30), and the last device (device 30) for block number 3.
The 136-bit Search operation is pipelined and executes as follows. Four cycles from the Search command, each of the devices
knows the outcome internal to it for that operation. In the fifth cycle after the Search command, the devices in a block (being less
than or equal to eight devices resolving the winner within them using the LHI[6:0] and LHO[1:0] signalling mechanism) arbitrate
for a winner amongst them. In the sixth cycle after the Search command, the blocks (of devices) resolve the winning block through
the BHI[2:0] and BHO[2:0] signalling mechanism. The winning device in the winning block is the global winning device for a Search
operation.
Table 10-23. Hit/Miss Assumption
Document #: 38-02041 Rev. *F
• First thirty devices (devices 0–29): CFG = 01010101, TLSZ = 10, HLAT = 001, LRAM = 0, and LDEV = 0.
• Thirty-first device (device 30): CFG = 01010101, TLSZ = 10, HLAT = 001, LRAM = 1, and LDEV = 1.
Search Number
136-bit Search on Tables Configured as ×136 Using up to 31 CYNSE70064A Devices
Block 0
Block 1
Block 2
Block 3
Miss
Miss
Miss
Hit
1
Miss
Miss
Hit
Hit
2
Miss
Miss
Hit
Hit
3
CYNSE70064A
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Miss
Miss
Miss
Miss
4