CYNSE10512A-133FGC Cypress Semiconductor Corp, CYNSE10512A-133FGC Datasheet - Page 85

• Manufacturer Part Number: CYNSE10512A-133FGC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CYNSE10512A-133FGC

• Operating Supply Voltage (typ): 1.2V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Not Compliant

Document #: 38-02110 Rev. *B
6.5.6
This subsection will cover mixed searches (×72, ×144, and ×288) with tables of different widths (×72, ×144, ×288). Note: Non-
Enhanced Mode does not support 576-bit tables. The sample operation shown is for 31 devices, with devices 0 to 7 containing
x72 tables (CFG field in Command register all zeroes for Non-Enhanced Mode, NES = “00” (binary) for all blocks for Enhanced
Mode), devices 8 to 15 containing x144 tables (CFG[63:0] field in Command register for CYNSE10512A = 5555555555555555
(hex), CFG[31:0] = 55555555 (hex) for CYNSE10256A, CFG[15:0] = 5555 (hex) for CYNSE10128A for Non-Enhanced Mode,
NES = “01” (binary) in all blocks for Enhanced Mode), and the rest of the devices containing x288 tables (CFG[63:0] =
AAAAAAAAAAAAAAAA (hex) for CYNSE10512A, CFG[31:0] = AAAAAAAA (hex) for CYNSE10256A, CFG[15:0] = AAAA (hex)
for CYNSE10128A for Non-Enhanced Mode, NES = “10” (binary) in all blocks for Enhanced Mode). The following figures show
three sequential searches: first, a 72-bit Search on a ×72-configured table; a 144-bit Search on a ×144-configured table; and a
288-bit Search on a ×288-configured table that each results in a hit.
The 31 cascaded devices can be viewed as three blocks of 8 devices and a fourth block of 7 devices, as shown in Figure 6-15.
Each individual block of 8 or 7 devices is connected very similarly to the connection shown in Figure 6-10, except that the BHI[2:0]
signals are connected to BHO of the previous block rather than being grounded. Figure 6-31 shows a graphical example of the
tables using CYNSE10512As.
Notes:
The timing diagrams below corresponds to the Hit/Miss assumptions defined in Table 6-12. For the purpose of illustrating the
timings, it is further assumed that there is only one device with a matching entry in each of the blocks.
Table 6-12. Hit/Miss Assumptions
• The “Block” in the figure above refers to a block of 8 devices, not a block within a single device.
• All 31 devices must be programmed with the same values for TLZ (“10” (binary)) and HLAT (“000” (binary) in this example).
• The device receiving all the LHO signals from the other devices is considered the last device.
• All the shared signals in the following timing diagrams showing tri-stated condition (“z”) indicate that, that particular device is
• One way to create many tables of different widths in a bank of NSEs is by having table designation bits. It is assumed that bits
Only the last device in the table must be programmed with LRAM = 1 (binary) and LDEV = 1 (binary) (device 30 in this case).
All other upstream devices must be programmed with LRAM = 0 (binary) and LDEV = 0 (binary) (devices 0 through 29 in this
case).
not driving the shared signals. The shared signals are not three-stated in a real life because other devices will be driving them.
[71:70] for each entry will be assigned such table designation bits. DQ[71:70] will be 00 in each of the two A and B cycles of the
×72-bit Search (Search1). DQ[71:70] is 01 in each of the A and B cycles of the ×144-bit Search (Search2). DQ[71:70] is 10 in
each of the A, B, C, and D cycles of the ×288-bit Search (Search3).
Blocks 2 and 3, Devices 16 to 30, 1 million entries
Search Number
Mixed-size Single Searches with 31 Devices on Tables Configured with Different Widths
Block 1, Devices 8 to 15, 1 million entries
Block 0
Block 1
Block 2
Block 3
Block 0, Devices 0 to 7, 2 million entries
Figure 6-31. Multiwidth Configurations Example with CYNSE10512As
CONFIDENTIAL
#1 (x72)
Miss
Miss
Miss
Hit
72
144
CFG = 0000000000000000 (hex)
288
CFG = 5555555555555555 (hex)
#2 (x144)
CFG = AAAAAAAAAAAAAAAA (hex)
Miss
Miss
Miss
Hit
CYNSE10512A
CYNSE10256A
CYNSE10128A
#3 (x288)
Miss
Miss
Miss
Hit
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