CYNSE10512A-133FGC Cypress Semiconductor Corp, CYNSE10512A-133FGC Datasheet - Page 16

• 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
4.2
Each 72-bit entry in the device can be accessed directly through its address index. With configurations greater than 72-bit entries,
the search address results are multiplied accordingly. For example, in 72-bit configurations, the resultant search addresses are
0,1,2,..., N. However, in 144-bit configurations, the resultant search addresses are 0,2,4,...,N-2.
The data and mask arrays addresses are as shown in Figure 4-3.
4.3
During a Search operation, the search data bit is masked with the corresponding global mask bit from the selected Global Mask
Register and the mask array bit before being compared to the data array entry bit to check for a match at that bit position (see
Table 4-1). The entry with a match on every bit position results in a successful Search. For example, in order for a successful
Search within a device to make the device the local winner, all 72-bit positions must generate a match for a 72-bit entry in 72-bit-
configured quadrants. The same applies to 144-bit, 288-bit, and 576-bit searches.
The on-chip priority encoder selects the first matching entry in the database that is nearest to memory address 0. An arbitration
mechanism using a cascade bus determines the global winning device among the local winning devices in a Search cycle. The
global winning device then drives the output signals. When there is no successful Search, the device designated as the last device
will drive the output signals (refer to Section 5.3 for more information on last device designation).
Table 4-1. Bit Position Match
N
Global Mask Bit
N/8
72-bit configuration
Data and Mask Addressing
Successful Search and Multiple Match Arbitration
575
71
0
1
1
1
1
1
N - 1
N - 8
72
72
0
1
2
3
0
8
0
N - 7
72
1
9
Figure 4-3. Addressing the Ayama 10000A Data and Mask Arrays
Mask Array Bit
N - 6
10
72
2
N/2
576-bit configuration
X
0
1
1
1
1
144-bit configuration
143
CONFIDENTIAL
N - 5
72
11
3
N - 2
72
0
2
4
6
N - 4
12
72
4
N - 1
72
1
3
5
7
Data Array Bit
[5]
N - 3
0
13
72
5
X
X
0
1
0
1
N - 2
14
72
6
N/4
N - 1
287
15
72
7
Search Key Bit
N - 4
72
0
4
0
288-bit configuration
X
X
0
0
1
1
N - 3
72
1
5
N = 262144 for CYNSE10512A
131072 for CYNSE10256A
65536 for CYNSE10128A
N - 2
72
CYNSE10512A
CYNSE10256A
CYNSE10128A
2
6
Match Result
N - 1
72
3
7
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1
1
1
0
0
1
0