Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) IP Cores User Guide

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ID 683148
Date 6/19/2017
Public
Document Table of Contents
Document Table of Contents x
1. Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) IP Cores User Guide
1. Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) IP Cores User Guide x
1.1. ALTDDIO Features 1.2. ALTDDIO Common Applications 1.3. ALTDDIO Resource Utilization and Performance 1.4. ALTDDIO Parameter Settings 1.5. ALTDDIO Functional Description 1.6. Design Example: 8-Bit DDR Divider Using ALTDDIO_BIDIR 1.7. ALTDDIO_IN IP Core Signals 1.8. ALTDDIO_OUT IP Core Signals 1.9. ALTDDIO_BIDIR IP Core Signals 1.10. Verilog HDL Prototype 1.11. VHDL Component Declaration 1.12. VHDL LIBRARY-USE Declaration 1.13. Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) IP Cores User Guide Archives 1.14. Document Revision History
1.2. ALTDDIO Common Applications x
1.2.1. DDR SDRAM, DDR2 SDRAM and RLDRAM II Memory 1.2.2. QDR SRAM and QDRII SRAM Memory Interfaces 1.2.3. High-Speed Interface Applications
1.5. ALTDDIO Functional Description x
1.5.1. DDR Device Configuration 1.5.2. DDR I/O Timing
1.5.1. DDR Device Configuration x
1.5.1.1. Input Configuration 1.5.1.2. Output Configuration 1.5.1.3. Bidirectional Configuration
1.6. Design Example: 8-Bit DDR Divider Using ALTDDIO_BIDIR x
1.6.1. Generate a Divider Using ALTDDIO_BIDIR 1.6.2. Create a Divider 1.6.3. Implement the Divider Design 1.6.4. Functional Results—Simulate the Divider Design in the ModelSim* - Intel® FPGA Edition Software
1.6.1. Generate a Divider Using ALTDDIO_BIDIR x
1.6.1.1. Create the ALTDDIO_BIDIR IP Core 1.6.1.2. Create the LPM_DIVIDE IP core
1. Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) IP Cores User Guide

1.7. ALTDDIO_IN IP Core Signals

These tables list the input and output ports for the ALTDDIO_IN IP core.
Figure 9. ALTDDIO_IN Ports


Table 4.  ALTDDIO_IN Input Ports
Name Required Description
datain[] Yes DDR input data port. Input port WIDTH wide. The datain port should be directly fed from an input pin in the top-level design.
inclock Yes Clock signal to sample the DDR input. The datain port is sampled on each clock edge of the inclock signal.
inclocken No Clock enable for the data clock
aclr No Asynchronous clear input. The aclr and aset ports cannot be connected at the same time.
aset No Asynchronous set input. The aclr and aset ports cannot be connected at the same time.
sclr No Synchronous clear input. The sclr and sset ports cannot be Arria® connected at the same time. The sclr port is available for Arria®  GX, Stratix®  III, Stratix®  II, Stratix®  II GX, Stratix® , Stratix®  GX, HardCopy II, and HardCopy  Stratix® devices only. 1
sset No Synchronous set input. The sclr and sset ports cannot be connected at the same time. The sset port is available for Arria®  GX, Stratix®  III, Stratix®  II, Stratix®  II GX, Stratix® , Stratix®  GX, HardCopy II, and HardCopy  Stratix® devices only. 1
Table 5.  ALTDDIO_IN Output Ports
Name Required Description
dataout_h[] Yes Data sampled from datain[] port at the rising edge of the inclock signal.
dataout_l[] Yes Data sampled from datain[] port at the falling edge of the inclock signal.
1 When designing with Stratix III devices, when sclr is asserted, it synchronously presets both the input path and resynchronization register.
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