CYNSE10512A-133FGC Cypress Semiconductor Corp, CYNSE10512A-133FGC Datasheet - Page 56

• 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
One of the key parameters that controls SEARCH operation is TLSZ (Statically programmed in Command Register). TLSZ
controls the maximum number of devices that can be cascaded and the latency of SEARCH instruction, as shown in Table 6-7.
Table 6-7. TLSZ[1:0] Description
The following is a list of SEARCH operations described in the data sheet:
DQ bus format and Addressing during Search Operations
The Ayama10000 family of search engine is addressable on x72-bit word boundaries. For tables that are 72-bit wide, every entry
gets written into an addressable entry. For tables that are x144, x288 or x576 per entry, it is up to the user to organize the NSE
using the Big-Endian approach or Little-Endian approach. The decision of using a x72 Big-Endian organization or a x72 Little-
Endian approach will affect the way to send in search keys during a search operation. Since the Ayama10000 has a x72 bit DQ
interface, search keys that are longer then 72-bits will require multiple bus cycles to get transferred into the NSE. For tables that
are organized with the x72 Big-Endian approach, make sure the search key also appears as x72 Big-Endian on the DQ bus (i.e.,
First transfer cycle contains the most significant 72 bits). Likewise for a Little-Endian organization, Search key on the DQ bus
must appear as Little-Endian (i.e., First transfer cycle contains the least significant 72 bits). Here is another way to represent the
relationship between the data presented on the different clock cycles during a search command and the entry in the NSE that it
will get compared to:
During a x144, x288 or x576 single search:
See Figure 6-5 for graphical explanation of a 288-bit search example.
TLSZ[1:0]
• Mixed-size Single Search for a single device on tables configured with different widths (TLSZ[1:0] = 10)
• Mixed-size MultiSearch for a single device on tables configured with different widths (TLSZ[1:0] = 10)
• 72-bit Single Search for single device or cascade up to eight devices (TLSZ[1:0] = 01)
• 144-bit Single Search for cascade up to 31 devices (TLSZ[1:0] = 10)
• 576-bit Single Search for single device or cascade up to eight devices (TLSZ[1:0] = 01)
• Mixed-size Single Search for cascade up to 31 devices on tables configured with different widths (TLSZ[1:0] = 10)
• Mixed-size MultiSearch for cascade up to eight devices on tables configured with different widths (TLSZ[1:0] = 01).
• Data presented on DQ bus during the 1st CLK2X cycle will be compared to the lowest 72-bit word of the NSE entry
• Data presented on DQ bus during the 2nd CLK2X cycle will be compared to the 2nd lowest 72-bit word of the NSE entry
• Data presented on DQ bus during the nth CLK2X cycle will be compared to the nth lowest 72-bit word of the NSE entry
00
01
10
11
Search Command
mode, 8 in multisearch
31 (in single-search
Max. # Devices in
Reserved
Cascade
mode)
1
8
CONFIDENTIAL
(CLK1X Cycles
Max frequency
Reserved
100 MHz
133 MHz
83 MHz
(CLK1X Cycles)
Search Latency
Reserved
4
5
6
CYNSE10256A, 1984k for CYNSE10128A
CYNSE10256A, 512k for CYNSE10128A
N = 2048k for CYNSE10512A, 1024k for
N = 7936k for CYNSE10512A, 3968k for
CYNSE10256A, 64k for CYNSE10128A
N = 256k for CYNSE10512A, 128k for
(with max. number of devices
Max. Table Size
N/2 x 144
N/4 x 288
N/8 x 576
N/2 x 144
N/4 x 288
N/8 x 576
N/2 x 144
N/4 x 288
N/8 x 576
Reserved
N x 72
N x 72
N x 72
CYNSE10512A
CYNSE10256A
CYNSE10128A
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