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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
®
GX
■ Cyclone II
■ Cyclone III
■ Cyclone IV GX
■ HardCopy
®
II
- DQ (ALTDQ) and DQS (ALTDQS) 1
- Megafunctions 1
- ALTDQ Megafunction 2
- ALTDQS Megafunction 2
- Getting Started 3
- Page 4 Getting Started 4
- Getting Started Page 5 5
- Notes to Table 2: 6
- Getting Started Page 7 7
- Notes to Table 3: 8
- Notes to Table 4: 9
- Notes to Table 5: 10
- Getting Started Page 11 11
- Note to Table 7: 12
- Megafunction 13
- Page 14 Getting Started 14
- Design Files 15
- Create an ALTDQ Megafunction 15
- Specifications 21
- VHDL Component Declaration 23
- : string := "0"; 24
- Ports and Parameters 25
- Page 26 Ports and Parameters 26
- Notes to Table 16: 27
- Note to Table 17: 28
- Note to Table 18: 28
- Ports and Parameters Page 29 29
- Page 30 Ports and Parameters 30
- Document Revision History 31
Inhaltsverzeichnis
Seite 1 - Megafunctions
November 2010 Altera CorporationUG-MF9304-3.2 User GuideSubscribe© 2010 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, HARDCOPY, MAX
Seite 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
Seite 3 - Getting Started
Getting Started Page 11November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 7 of the ALTDQS parameter editor is the Dsqn_pad
Seite 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
Seite 5 - Getting Started Page 5
Getting Started Page 13November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) Megafunctions<function name>.cmp), Quartus II symbol file (&
Seite 6 - Notes to Table 2:
Page 14 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationPage 3 of the ALTDQ parameter editor is the Parameter
Seite 7 - Getting Started Page 7
Design Example: Implement DDR I/O Interface Page 15November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 4 of the MegaWizard
Seite 8 - Notes to Table 3:
Page 16 Design Example: Implement DDR I/O InterfaceDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationTable 10 shows the MegaWi
Seite 9 - Notes to Table 4:
Design Example: Implement DDR I/O Interface Page 17November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsThe ALTDQ module is gener
Seite 10 - Notes to Table 5:
Page 18 Design Example: Implement DDR I/O InterfaceDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera Corporation4. In the Settings window
Seite 11 - Getting Started Page 11
Design Example: Implement DDR I/O Interface Page 19November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) Megafunctions7. When a message indicat
Seite 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
Seite 13 - Megafunction
Page 20 Design Example: Implement DDR I/O InterfaceDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationFigure 2. ModelSim Simula
Seite 14 - Page 14 Getting Started
Specifications Page 21November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsSpecificationsThis section describes the prototypes, c
Seite 15 - Create an ALTDQ Megafunction
Page 22 SpecificationsDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationALTDQSmodule altdqs#( parameter delay_buffer_mode = &q
Seite 16
Specifications Page 23November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsVHDL Component DeclarationYou can locate the following
Seite 17
Page 24 SpecificationsDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationALTDQScomponent altdqsgeneric (delay_buffer_mode : str
Seite 18
Ports and Parameters Page 25November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsVHDL LIBRARY-USE DeclarationThe VHDL LIBRARY-USE
Seite 19
Page 26 Ports and ParametersDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationTable 13 shows the output ports for the ALTDQ me
Seite 20
Ports and Parameters Page 27November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsTable 16 shows the input ports for the ALTDQS me
Seite 21 - Specifications
Page 28 Ports and ParametersDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationTable 18 shows the bidirectional ports for the A
Seite 22
Ports and Parameters Page 29November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsDQS_OUTPUT_SYNC_RESETString NoSpecifies whether
Seite 23 - VHDL Component Declaration
Getting Started Page 3November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsCommon ApplicationsThe ALTDQ and ALTDQS megafunctions
Seite 24 - : string := "0";
Page 30 Ports and ParametersDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationDLL_USE_UPNDNINCLKENAString NoSpecifies whether
Seite 25 - Ports and Parameters
Document Revision History Page 31November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsDocument Revision HistoryTable 20 shows the
Seite 26 - Page 26 Ports and Parameters
Page 4 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationPage 3 of the ALTDQS parameter editor is the General p
Seite 27 - Notes to Table 16:
Getting Started Page 5November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsHow should the delay chain be specified?This can be ei
Seite 28 - Note to Table 18:
Page 6 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationInvert dqs_padio port (when driving output)When you se
Seite 29 - Ports and Parameters Page 29
Getting Started Page 7November 2010 Altera Corporation DQ (ALTDQ) and DQS (ALTDQS) MegafunctionsPage 4 of the ALTDQS parameter editor is the General 2
Seite 30 - Page 30 Ports and Parameters
Page 8 Getting StartedDQ (ALTDQ) and DQS (ALTDQS) Megafunctions November 2010 Altera CorporationHow many valid half cycles of the inclk input should p
Seite 31 - Document Revision History
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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