FIR II IP Intel® FPGA IP: User Guide

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ID 683208
Date 9/17/2024
Public
Document Table of Contents
Document Table of Contents x
1. About the FIR II IP Intel® FPGA IP 2. FIR II IP Getting Started 3. FIR II IP Parameters 4. FIR II IP Functional Description 5. Document Revision History for the FIR II IP User Guide A. FIR II IP Core Document Archive
1. About the FIR II IP Intel® FPGA IP x
1.1. DSP Intel® FPGA IP Features 1.2. FIR II IP Core Features 1.3. FIR II IP Device Support 1.4. DSP Intel® FPGA IP Verification 1.5. FIR II IP Release Information 1.6. FIR II IP Core Performance and Resource Utilization
2. FIR II IP Getting Started x
2.1. Installing and Licensing Intel® FPGA IP Cores 2.2. IP Catalog and Parameter Editor 2.3. Specifying the IP Parameters and Options ( Quartus® Prime Pro Edition) 2.4. Simulating Intel® FPGA IP Cores 2.5. Simulating the FIR II IP Testbench in MATLAB 2.6. DSP Builder Design Flow
2.1. Installing and Licensing Intel® FPGA IP Cores x
2.1.1. Intel® FPGA IP Evaluation Mode 2.1.2. FIR II IP Core Intel® FPGA IP Evaluation Mode Timeout Behavior
2.3. Specifying the IP Parameters and Options ( Quartus® Prime Pro Edition) x
2.3.1. IP Core Generation Output ( Quartus® Prime Pro Edition)
3. FIR II IP Parameters x
3.1. FIR II IP Core Filter Specification 3.2. FIR II IP Core Coefficient Settings 3.3. FIR II IP Core Coefficients 3.4. FIR II IP Core Input and Output Options 3.5. FIR II IP Core Implementation Options 3.6. FIR II IP Core Reconfigurability
3.3. FIR II IP Core Coefficients x
3.3.1. Loading Coefficients from a File
3.4. FIR II IP Core Input and Output Options x
3.4.1. Signed Fractional Binary 3.4.2. MSB and LSB Truncation, Saturation, and Rounding
3.5. FIR II IP Core Implementation Options x
3.5.1. Memory and Multiplier Trade-Offs
3.5.1. Memory and Multiplier Trade-Offs x
3.5.1.1. Using Memory Block Threshold 3.5.1.2. Using Dual-port RAM Threshold 3.5.1.3. Using Large RAM Threshold 3.5.1.4. Using Hard Multiplier Threshold
4. FIR II IP Functional Description x
4.1. FIR II IP Core Interpolation Filters 4.2. FIR Decimation Filters 4.3. FIR II IP Time-Division Multiplexing 4.4. FIR II IP Core Multichannel Operation 4.5. FIR II IP Multiple Coefficient Banks 4.6. FIR II IP Coefficient Reloading 4.7. Reconfigurable FIR Filters 4.8. FIR II IP Core Interfaces and Signals
4.4. FIR II IP Core Multichannel Operation x
4.4.1. Vectorized Inputs 4.4.2. Channelization 4.4.3. Channel Input and Output Format
4.4.3. Channel Input and Output Format x
4.4.3.1. Eight Channels on Three Wires 4.4.3.2. Four Channels on Four Wires 4.4.3.3. 15 Channels with 15 Valid Cycles and 17 Invalid Cycles 4.4.3.4. 22 Channels with 11 Valid Cycles and 9 Invalid Cycles 4.4.3.5. Super Sample Rate
4.8. FIR II IP Core Interfaces and Signals x
4.8.1. Avalon Streaming Interfaces in DSP Intel FPGA IP 4.8.2. FIR II IP Core Avalon-ST Interfaces 4.8.3. FIR II IP Signals 4.8.4. FIR Filter Reset
4.8.2. FIR II IP Core Avalon-ST Interfaces x
4.8.2.1. Avalon-ST Sink Interface 4.8.2.2. Avalon-ST Source Interface
4.8.2.1. Avalon-ST Sink Interface x
4.8.2.1.1. Single Channel on Single Wire 4.8.2.1.2. Multiple Channels on Single Wire 4.8.2.1.3. Multiple Channels on Multiple Wires
1. About the FIR II IP Intel® FPGA IP
2. FIR II IP Getting Started
3. FIR II IP Parameters
4. FIR II IP Functional Description
5. Document Revision History for the FIR II IP User Guide
A. FIR II IP Core Document Archive

3.5.1.2. Using Dual-port RAM Threshold

This FIR II IP core threshold is trade-off between small and medium RAM blocks. This threshold is similar to the Memory Block Threshold except that it applies only to the dual-port memories.

The IP implements any dual-port memory in a block memory rather than logic elements, but for some device families different sizes of block memory may be available. The threshold value determines which medium-size RAM memory blocks the IP implements instead of small-memory RAM blocks. For example, the threshold that determines whether to use M9K blocks rather than MLAB blocks on Stratix  IV devices.

  1. Set the default threshold value, to implement dual memories greater than 1,280 bits as M9K blocks and dual memories less than or equal to 1,280 bits as MLABs.
  2. Change this threshold to a lower value such as 200, to implement dual memories greater than 200 bits as M9K blocks and dual memories less than or equal to 200 bits as MLAB blocks.
    Note: For device families with only one type of memory block, this threshold has no effect.
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