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參數(shù)資料
| 型號： | LF3320QC15 |
| 廠商： | LOGIC DEVICES INC |
| 元件分類： | 數(shù)字信號處理外設(shè) |
| 英文描述： | Horizontal Digital Image Filter |
| 中文描述： | 12-BIT, DSP-DIGITAL FILTER, PQFP144 |
| 封裝： | PLASTIC, QFP-144 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大?。?/td> | 575K |
| 代理商： | LF3320QC15 |
DEVICES INCORPORATED
Video Imaging Products
2-17
LF3320
Horizontal Digital Image Filter
08/16/2000
–
LDS.3320-N
ADDR
1
DATA
1
ROUND REGISTER
CLK
W1
W1: Round Register loaded with new data on this rising clock edge.
PAUSEA/PAUSEB
DATA
2
DATA
3
DATA
4
LDA/LDB
CFA/CFB
11-0
F
IGURE
21. R
OUND
R
EGISTER
L
OADING
S
EQUENCE
WITH
PAUSE I
MPLEMENTATION
ADDR
1
DATA
1
ADDR
2
CONFIGURATION REGISTER
CLK
W2
W1: Configuration Register loaded with new data on this rising clock edge.
W2: Select Register loaded with new data on this rising clock edge.
PAUSEA/PAUSEB
DATA
1
SELECT REGISTER
W1
LDA/LDB
CFA/CFB
11-0
F
IGURE
20. C
ONFIGURATION
AND
S
ELECT
R
EGISTER
L
OADING
S
EQUENCE
WITH
PAUSE I
MPLEMENTATION
11 10 9
DESCRIPTION
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Coefficient Banks
Configuration Registers
Filter A Select Registers
Filter B Select Registers
Filter A Round Registers
Filter B Round Registers
Filter A Limit Registers
Filter B Limit Registers
T
ABLE
8. CFA/CFB
11-9
D
ECODE
After the last data value is loaded, the
interface will expect a new address
value on the next clock cycle. After the
next address value is loaded, data
loading will begin again as previously
discussed. As long as data is loaded
into the interface, LDA must remain
LOW. After all desired coefficient banks
and Configuration/Control registers are
loaded with data, the LF Interface
TM
must be disabled. This is done by
setting LDA HIGH on the clock cycle
after the clock cycle which latches the
last data value. It is important that the
LF Interface
TM
remain disabled when
not loading data into it.
The Filter A coefficient banks may only be
loaded with the Filter A LF Interface
TM
and
the Filter B coefficient banks may only be
loaded with the Filter B LF Interface
TM
.
The Configuration and Control
registers may be loaded with either the
Filter A or B LF Interfaces
TM
.
Since both LF Interfaces
TM
operate
independently of each other, both LF
Interfaces
TM
can load data into their
respective coefficient banks at the same
time. Or, one LF Interface
TM
can load
the Configuration/ Control registers
while the other loads it’s respective
coefficient banks. If both LF
Interfaces
TM
are used to load a Configu-
ration or Control register at the same
time, the Filter B LF Interface
TM
will be
given priority over the Filter A LF
Interface
TM
. For example, if the Filter A
LF Interface
TM
attempts to load data
into a configuration register at the
same time that the Filter B LF
Interface
TM
attempts to load a Filter A
round register, the Filter B LF
Interface
TM
will be allowed to load the
round register while the Filter A LF
Interface
TM
will not be allowed to load
the configuration register. However,
the Filter A LF Interface
TM
will
continue to function as if the write
occurred.
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