Altera Integer Arithmetic IP Bedienungsanleitung PDF herunterladen (Seite 144)

Table 10-4: ALTMULT_COMPLEX Megafunction Parameters

Parameter Name Type Required Description

IMPLEMENTATION_STYLE String Yes Specifies the representation algorithm

and the number of bits per channel.

Values are AUTO, CANONICAL, and

CONVENTIONAL. If omitted, the default

value is AUTO. When set to AUTO, the

Quartus II software determines the best

implementation based on the selected

device family and input width. A value

of CANONICAL is available for input

widths that are less than 18 bits and for

all supported devices, except for Stratix

III devices. A value of CONVENTIONAL is

available for all supported device

families for all input ranges (1 to 256

bits).

PIPELINE

Integer Yes Specifies the amount of latency, in clock

cycles, needed to produce the result.

Values are [0..14]. If omitted, the

default value is 4. If the value of

IMPLEMENTATION_STYLE is CANONICAL,

the maximum value of PIPELINE is 14,

and if the value of the IMPLEMENTA-

TION_STYLE parameter is

CONVENTIONAL, the maximum value of

PIPELINE is 11.

REPRESENTATION_A String Yes Specifies the number representation of

data A. Values are UNSIGNED and

SIGNED. If omitted, the default value is

UNSIGNED. The data A inputs are

interpreted as unsigned numbers when

the value is set to UNSIGNED, and as

two's complement when the value is set

to SIGNED.

REPRESENTATION_B String Yes Specifies the number representation of

data B. Values are UNSIGNED and

SIGNED. If omitted, the default value is

UNSIGNED. The data B inputs are

interpreted as unsigned numbers when

the value is set to UNSIGNED, and as

two's complement when the value is set

to SIGNED.

WIDTH_A Integer Yes Specifies the width of the dataa_

real[] and dataa_imag[] ports. Value

must be 256 bits or less. If omitted, the

default value is 18.

UG-01063

2014.12.19

ALTMULT_COMPLEX Parameters

10-7

ALTMULT_COMPLEX (Complex Multiplier)

Altera Corporation

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