Altera DQ (ALTDQ) Uživatelský manuál stáhnout pdf (Strana 1)

November 2010 Altera Corporation

UG-MF9304-3.2 User Guide

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DQ (ALTDQ) and DQS (ALTDQS)

Megafunctions

Introduction

The Quartus

II software provides parameterizable megafunctions ranging from simple

arithmetic units, such as adders and counters, to advanced phase-locked loop (PLL) blocks,

multipliers, and memory structures. These megafunctions are performance-optimized for

Altera devices and therefore provide more efficient logic synthesis and device

implementation, because they automate the coding process and save valuable design time.

You should use these functions during design implementation so you can consistently meet

your design goals.

General Description

This user guide discusses the following topics:

■ General features of the ALTDQ and ALTDQS megafunctions

■ Parameterization of the ALTDQ and ALTDQS megafunctions through the MegaWizard

™

Plug-In Manager

■ Port and parameter definitions of the ALTDQ and ALTDQS megafunctions

The ALTDQ and ALTDQS megafunctions allow you to control the functionality of the DDR

I/O pins for each of the device families. Most of the features of the megafunction map

directly into features of the I/O element (IOE) for each device family. For Cyclone

II devices

that do not have DDR I/O registers in the IOE, the features are implemented in logic cells.

The ALTDQ and ALTDQS megafunctions are provided in the Quartus II software

MegaWizard Plug-In Manager. You can configure the DQ and DQS pins as input, output, or

bidirectional DDR pins on all the I/O banks of the device, depending on the specific custom

external memory interface requirements. Both DQ and DQS are bidirectional (the same

signals are used for both writes and reads). A group of DQ pins is associated with one DQS

pin. Use the ALTDQ and ALTDQS megafunctions to configure the DQ and DQS paths,

respectively.

Device Family Support

The ALTDQ and ALTDQ_DQS megafunctions support the following Altera

device families:

■ Arria

■ Cyclone II

■ Cyclone III

■ Cyclone IV GX

■ HardCopy

1 2 3 4 5 6 ... 30 31

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Strany 1 - Megafunctions

Strany 2 - ALTDQS Megafunction

Page 10 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationPage 6 of the ALTDQS parameter editor is the Output E

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Getting Started Page 11November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 7 of the ALTDQS parameter editor is the Dsqn_pad

Strany 4 - Page 4 Getting Started

Page 12 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationPage 8 of the ALTDQS MegaWizard Plug-In Manager is th

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Getting Started Page 13November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) Megafunctions<function name>.cmp), Quartus II symbol file (&

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Page 14 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationPage 3 of the ALTDQ parameter editor is the Parameter

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Design Example: Implement DDR I/O Interface Page 15November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 4 of the MegaWizard

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Page 16 Design Example: Implement DDR I/O InterfaceDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationTable 10 shows the MegaWi

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Design Example: Implement DDR I/O Interface Page 17November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsThe ALTDQ module is gener

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Page 18 Design Example: Implement DDR I/O InterfaceDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera Corporation4. In the Settings window

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Design Example: Implement DDR I/O Interface Page 19November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) Megafunctions7. When a message indicat

Strany 12 - Note to Table 7:

Page 2 IntroductionDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera Corporation Stratix® Stratix GX Stratix II Stratix II GXALTDQ Me

Strany 13 - Megafunction

Page 20 Design Example: Implement DDR I/O InterfaceDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationFigure 2. ModelSim Simula

Strany 14 - Page 14 Getting Started

Specifications Page 21November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsSpecificationsThis section describes the prototypes, c

Strany 15 - Create an ALTDQ Megafunction

Page 22 SpecificationsDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationALTDQSmodule altdqs#( parameter delay_buffer_mode = &q

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Specifications Page 23November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsVHDL Component DeclarationYou can locate the following

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Page 24 SpecificationsDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationALTDQScomponent altdqsgeneric (delay_buffer_mode : str

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Ports and Parameters Page 25November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsVHDL LIBRARY-USE DeclarationThe VHDL LIBRARY-USE

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Page 26 Ports and ParametersDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationTable 13 shows the output ports for the ALTDQ me

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Ports and Parameters Page 27November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsTable 16 shows the input ports for the ALTDQS me

Strany 21 - Specifications

Page 28 Ports and ParametersDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationTable 18 shows the bidirectional ports for the A

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Ports and Parameters Page 29November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsDQS_OUTPUT_SYNC_RESETString NoSpecifies whether

Strany 23 - VHDL Component Declaration

Getting Started Page 3November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsCommon ApplicationsThe ALTDQ and ALTDQS megafunctions

Strany 24 - : string := "0";

Page 30 Ports and ParametersDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationDLL_USE_UPNDNINCLKENAString NoSpecifies whether

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Document Revision History Page 31November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsDocument Revision HistoryTable 20 shows the

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Page 4 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationPage 3 of the ALTDQS parameter editor is the General p

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Getting Started Page 5November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsHow should the delay chain be specified?This can be ei

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Page 6 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationInvert dqs_padio port (when driving output)When you se

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Getting Started Page 7November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 4 of the ALTDQS parameter editor is the General 2

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Page 8 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationHow many valid half cycles of the inclk input should p

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Getting Started Page 9November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 5 of the ALTDQS parameter editor is the Output Re

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