Altera Integer Arithmetic IP Manuale Utente Scaricare il pdf (Pagina 96)

Parameter Name Type Required Description

MUTIPLIER3_DIRECTION String No Specifies whether the fourth

and all subsequent odd-

numbered multipliers add or

subtract their results from the

total. Values are ADD and SUB.

If the addnsub3 port is used,

this parameter is ignored. If

omitted, the default value is

ADD.

NUMBER_OF_MULTIPLIERS Integer Yes Number of multipliers to be

added together. Values are 1

up to 4.

WIDTH_C Integer Yes Specifies the width of the

datac[] port.

WIDTH_COEF Integer Yes Specifies the width of the

coefsel[] port.

LOADCONST_VALUE Integer No Pre-load constant value to

complement accumulator

mode. Values are 2^N where

0 < N < 64.

PREADDER_MODE String No Specifies the mode of pre-

adder settings to be used.

Values are SIMPLE, COEF,

INPUT, SQUARE, and

CONSTANT. The default value

is SIMPLE.

PREADDER_DIRECTION_0 String No Specifies whether the pre-

adder of the first multiplier

adds or subtracts its value

from the sum. Values are ADD

and SUB. If omitted, the

default value is ADD.

PREADDER_DIRECTION_1 String No Specifies whether the pre-

adder of the second

multiplier adds or subtracts

its value from the sum.

Values are ADD and SUB. If

omitted, the default value is

ADD.

PREADDER_DIRECTION_2 String No Specifies whether the pre-

adder of the third multiplier

adds or subtracts its value

from the sum. Values are ADD

and SUB. If omitted, the

default value is ADD.

UG-01063

2014.12.19

ALTMULT_ACCUM Parameters

8-15

ALTMULT_ACCUM (Multiply-Accumulate)

Altera Corporation

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Altera Integer Arithmetic IP Manuale Utente Pagina 96

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