Altera Integer Arithmetic IP - Manual (Page 154)

Parameters
The following table lists the parameters for the PARALLEL_ADD megafunction.
Table 12-4: PARALLEL_ADD Megafunction Parameters
Parameter Name Type Required Description
WIDTH
Integer Yes Specifies the width of the
data[]
input port.
SIZE
Integer Yes Specifies the number of inputs to add.
WIDTHR
Integer Yes Specifies the width of the
result[]
output
port.
SHIFT
Integer Yes Specifies the relative shift of the data vectors.
NEW_SUBTRACT
String No Specifies whether to add or subtract the most
significant input word bit. Values are
NO
or
YES
. If omitted, the default value is
NO
.
REPRESENTATION
String No Specifies whether the input is signed or
unsigned. Values are
UNSIGNED
or
SIGNED
. If
omitted, the default value is
UNSIGNED
.
PIPELINE
Integer No Specifies the value, in clock cycles, of the
output latency.
RESULT_ALIGNMENT
String No Specifies the alignment of the
result
port.
Values are
MSB
or
LSB
. If omitted, the default
value is
LSB
.
INTENDED_DEVICE_FAMILY
String No This parameter is used for modeling and
behavioral simulation purposes. Create the
ALTCDR_RX megafunction with the
MegaWizard Plug-In Manager to calculate the
value for this parameter.
LPM_HINT
String No
When you instantiate a library of parameter‐
ized modules (LPM) function in a VHDL
Design File (.vhd), you must use the
LPM_
HINT
parameter to specify an Altera-specific
parameter. For example:
LPM_HINT =
"CHAIN_SIZE = 8, ONE_INPUT_IS_
CONSTANT = YES"
The default value is
UNUSED
.
LPM_TYPE
String No Identifies the library of parameterized
modules (LPM) entity name in VHDL design
files.
Design Example: Shift Accumulator
12-4 Parameters
UG-01063
2014.12.19
Altera Corporation PARALLEL_ADD (Parallel Adder)
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