Design example: 8 × 8 multiplier, Design example: 8 × 8 multiplier -5 – Altera Integer Arithmetic IP User Manual
Page 78
Parameter Name
Type
Required
Description
DATA_REPRESENTATION
String
No
Specifies whether the
coeff_in[]
input port and the pre-loaded
coefficients are signed or unsigned.
COEFF_REPRESENTATION
String
No
Specifies whether the
coeff_in[]
input port and the pre-loaded
coefficients are signed or unsigned.
INTENDED_DEVICE_FAMILY
String
No
This parameter is used for modeling
and behavioral simulation purposes.
Create the ALTMEMMULT
megafunction with the MegaWizard
Plug-In Manager to calculate the
value for this parameter.
LPM_HINT
String
No
When you instantiate a library of
parameterized 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.
MAX_CLOCK_CYCLES_PER_RESULT
Integer No
Specifies the number of clock cycles
per result.
NUMBER_OF_COEFFICIENTS
Integer No
Specifies the number of coefficients
that are stored in the lookup table.
RAM_BLOCK_TYPE
String
No
Specifies the ram block type. Values
are
AUTO
,
SMALL
,
MEDIUM
,
M512
, and
M4K
. If omitted, the default value is
AUTO
.
Design Example: 8 × 8 Multiplier
This design example uses the ALTMEMMULT megafunction to generate a basic multiplier using RAM
blocks to determine the 16-bit product of two unsigned 8-bit numbers. This example uses the
MegaWizard Plug-In Manager in the Quartus II software.
:
memmult_ex.qar (archived Quartus II design files)
altmemmult_ex_msim (ModelSim-Altera files)
UG-01063
2014.12.19
Design Example: 8 × 8 Multiplier
7-5
ALTMEMMULT (Memory-based Constant Coefficient Multiplier)
Altera Corporation