參數(shù)資料
型號: CYNSE70064A
廠商: Cypress Semiconductor Corp.
英文描述: Search Engine
中文描述: 搜索引擎
文件頁數(shù): 13/127頁
文件大?。?/td> 3275K
代理商: CYNSE70064A
CYNSE70064A
Document #: 38-02041 Rev. *E
Page 13 of 127
6.0
Clocks
CYNSE70064A receives the CLK2X and PHS_L signals. It uses the PHS_L signal to divide CLK2X and generate an internal
CLK, as shown in
Figure 6-1
. The CYNSE70064A uses CLK2X and CLK for internal operations.
7.0
All registers in the CYNSE70064A are 68 bits wide. The CYNSE70064A contains 16 pairs of comparand storage registers, eight
pairs of GMRs, eight search successful index registers and one each of CMD, information, burst Read, burst Write, and next-free
address registers.
Table 7-1
provides an overview of all the CYNSE70064A registers. The registers are ordered in ascending
address order. Each register group is then described in the following subsections.
Registers
7.1
The device contains 32 68-bit comparand registers (16 pairs) dynamically selected in every Search operation to store the
comparand presented on the DQ bus. The Learn command will later use these registers when executed. The CYNSE70064A
stores the Search command’s cycle A comparand in the even-numbered register and the cycle B comparand in the odd-numbered
register, as shown in
Figure 7-1
.
Address
Comparand Registers
Table 7-1. Register Overview
Address
0–31
Abbreviation
COMP0–31
Type
R
Name
Sixteen pairs of comparand registers that store comparands from the
DQ bus for learning later.
Eight global mask register pairs.
Eight search successful index registers.
Command register.
Information register.
Burst Read register.
Burst Write register.
Next-free address register.
Reserved.
32–47
48–55
56
57
58
59
60
61–63
MASKS
SSR0–7
COMMAND
INFO
RBURREG
WBURREG
NFA
RW
R
RW
R
RW
RW
R
CLK2X
PHS_L
CLK
Figure 6-1. CYNSE70064A Clocks (CLK2X and PHS_L)
135
0
68
68
1
3
5
7
0
2
4
6
30
31
index
0
1
15
Figure 7-1. Comparand-Register Selection During Search and Learn Instructions
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