Altera Integer Arithmetic IP Bedienungsanleitung PDF herunterladen (Seite 85)

Verilog HDL Prototype

To view the Verilog HDL prototype for the megafunction, refer to the Verilog Design File (.v) altera_mf.v

in the <Quartus II installation directory>\eda\synthesis directory.

VHDL Component Declaration

To view the VHDL component declaration for the megafunction, refer to the VHDL Design File (.vhd)

altera_mf_components.vhd in the <Quartus II installation directory>\libraries\vhdl\altera_mf directory.

VHDL LIBRARY_USE Declaration

The VHDL LIBRARY-USE declaration is not required if you use the VHDL Component Declaration.

LIBRARY altera_mf;

USE altera_mf.altera_mf_components.all;

ALTMULT_ACCUM Ports

The following tables list the input and output ports for the ALTMULT_ACCUM megafunction.

Note:

For Arria V, Cyclone V, and Stratix V devices, each register can select between two asynchronous

clear signals (ACLR0, ACLR1) and three clock/enable pairs (CLOCK0/ENA0, CLOCK1/ENA1, CLOCK2/

ENA2).

Table 8-2: ALTMULT_ACCUM Megafunction Input Ports

Port Name Required Description

accum_sload No

Causes the value on the accumulator feedback path to go to

zero (0) or to accum_sload_upper_data when concatenated

with 0. If the accumulator is adding and the accum_sload port

is high, then the multiplier output is loaded into the

accumulator. If the accumulator is subtracting, then the

opposite (negative value) of the multiplier output is loaded

into the accumulator.

Beginning from Stratix V devices onwards, the accum_sload

port causes the value on the accumulator feedback path to go

to zero (0) or to accum_sload_upper_data when concaten‐

ated with 1 and loads the multiplier output if the accum_sload

port is low.

aclr0

No The first asynchronous clear input. The aclr0 port is active

high.

aclr1 No The second asynchronous clear input. The aclr1 port is

active high.

8-4

Verilog HDL Prototype

UG-01063

2014.12.19

Altera Corporation

ALTMULT_ACCUM (Multiply-Accumulate)

Send Feedback

1 2 ... 80 81 82 83 84 85 86 87 88 89 90 ... 156 157

Kommentare zu diesen Handbüchern

Keine Kommentare

Altera Integer Arithmetic IP Bedienungsanleitung Seite 85

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Messgeräte Altera Integer Arithmetic IP