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參數(shù)資料
| 型號： | lpm-shiftreg |
| 廠商： | Altera Corporation |
| 英文描述： | Parameteruzed Shift Register(參數(shù)確定的移位寄存器) |
| 中文描述： | Parameteruzed移位寄存器（參數(shù)確定的移位寄存器） |
| 文件頁數(shù)： | 29/48頁 |
| 文件大小： | 293K |
| 代理商： | LPM-SHIFTREG |
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24
Altera Corporation
Arithmetic Functions
Parameters
Note:
(1)
The
LATENCY
parameter is provided only for backwards-compatibility with MAX+PLUS II pre-version 7.0 designs.
For all new designs, you should use the
LPM_PIPELINE
parameter instead.
Name
Required
Value
Description
INPUT_A_IS_CONSTANT
No
"YES"
"NO"
If
dataa[]
is connected to a constant value, setting the value
of
INPUT_A_IS_CONSTANT
to
"YES"
optimizes the multiplier
for resource usage and speed. The default value is
"NO"
.
If
datab[]
is connected to a constant value, setting the value
of
INPUT_B_IS_CONSTANT
to
"YES"
optimizes the multiplier
for resource usage and speed. The default value is
"NO"
.
Specifies the number of clock cycles of latency associated with
the
result[]
output. The default value of zero (
0
) indicates
that no latency exists, and that a purely combinatorial function
will be instantiated. The default value is 0 (non-pipelined).
Type of multiplication performed. The default value is
"UNSIGNED"
.
Width of the
dataa[]
port.
Width of the
datab[]
port.
Width of the
result[]
port. The default is
LPM_WIDTHA+LPM_WIDTHB
.
Width of the
sum[]
port. If the
sum[]
port is not used,
LPM_WIDTHS
must be set to a value between 1 and
LPM_WIDTHP
, inclusive. The default value is
LPM_WIDTHA
.
Same as
LPM_PIPELINE
.
INPUT_B_IS_CONSTANT
No
"YES"
"NO"
LPM_PIPELINE
No
Integer
≥
0
LPM_REPRESENTATION
No
"SIGNED"
"UNSIGNED"
Integer > 0
Integer > 0
Integer > 0
LPM_WIDTHA
Yes
Yes
Yes
LPM_WIDTHB
LPM_WIDTHP
LPM_WIDTHS
No
Integer > 0
LATENCY
,
Note (1)
No
Integer
≥
0
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