AN 661: Implementing Fractional PLL Reconfiguration with Altera PLL and Altera PLL Reconfig IP Cores

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ID 683640
Date 10/14/2019
Public
Document Table of Contents
Document Table of Contents x
1. Implementing Fractional PLL Reconfiguration with Altera PLL and Altera PLL Reconfig IP Cores
1. Implementing Fractional PLL Reconfiguration with Altera PLL and Altera PLL Reconfig IP Cores x
1.1. Fractional PLL Reconfiguration in 28-nm Devices 1.2. Fractional PLL Dynamic Phase Shifting in the Intel® Quartus® Prime Software 1.3. Design Considerations 1.4. Using the Design Examples 1.5. Tutorial Walkthrough 1.6. Document Revision History for AN 661: Implementing Fractional PLL Reconfiguration with Altera PLL and Altera PLL Reconfig IP Cores
1.1. Fractional PLL Reconfiguration in 28-nm Devices x
1.1.1. Implementing Fractional PLL Reconfiguration on 28-nm Devices Using the Intel® Quartus® Prime Software
1.1.1. Implementing Fractional PLL Reconfiguration on 28-nm Devices Using the Intel® Quartus® Prime Software x
1.1.1.1. Connectivity between Altera PLL and Altera PLL Reconfig IP Cores 1.1.1.2. Connecting Altera PLL and Altera PLL Reconfig IP Cores 1.1.1.3. Avalon-MM Signals in Altera PLL Reconfig IP Core 1.1.1.4. Registers and Counters Settings 1.1.1.5. Reconfiguring Fractional PLL Settings with Avalon-MM Interface 1.1.1.6. .mif Streaming Reconfiguration
1.1.1.4. Registers and Counters Settings x
1.1.1.4.1. Fractional PLL Dynamic Reconfiguration Registers and Settings 1.1.1.4.2. Counter Address and Bit Setting During Read Operation 1.1.1.4.3. Dynamic Phase Shift Counter and cnt_select (Dynamic_Phase_Shift[20:16]) Bit Setting
1.1.1.5. Reconfiguring Fractional PLL Settings with Avalon-MM Interface x
1.1.1.5.1. Waveform Example for Dynamic Reconfiguration with Avalon-MM Interface
1.1.1.6. .mif Streaming Reconfiguration x
1.1.1.6.1. Stitching Two .mif Files Generated by the Intel® Quartus® Prime Software 1.1.1.6.2. .mif Streaming Reconfiguration with Altera PLL Reconfig IP Core 1.1.1.6.3. .mif File Format 1.1.1.6.4. .mif Streaming Reconfiguration Operation Codes
1.2. Fractional PLL Dynamic Phase Shifting in the Intel® Quartus® Prime Software x
1.2.1. Performing Dynamic Phase Shifting with Altera PLL IP Core 1.2.2. Performing Dynamic Phase Shifting with Altera PLL Reconfig IP Core
1.2.1. Performing Dynamic Phase Shifting with Altera PLL IP Core x
1.2.1.1. Waveform Example for Dynamic Phase Shift with Altera PLL IP Core 1.2.1.2. Dynamic Phase Shift Signals in Altera PLL IP Core 1.2.1.3. Logical Counter Bit Setting
1.2.2. Performing Dynamic Phase Shifting with Altera PLL Reconfig IP Core x
1.2.2.1. Waveform Example for Dynamic Phase Shift with Altera PLL Reconfig IP Core
1.4. Using the Design Examples x
1.4.1. Software Requirement 1.4.2. Design Example 1: PLL Reconfiguration with Altera PLL Reconfig IP Core to Reconfigure M, N, and C Counters 1.4.3. Design Example 2: PLL Reconfiguration with Altera PLL Reconfig IP Core to Perform Dynamic Phase Shift 1.4.4. Design Example 3: PLL Reconfiguration with Altera PLL Reconfig IP Core using Qsys Design Flow 1.4.5. Design Example 4: Dynamic Phase Shift with Altera PLL IP Core 1.4.6. Design Example 5: .mif Streaming Reconfiguration
1.4.4. Design Example 3: PLL Reconfiguration with Altera PLL Reconfig IP Core using Qsys Design Flow x
1.4.4.1. Qsys System and Components 1.4.4.2. Main Menu Commands in Qsys 1.4.4.3. Submenu Commands in Qsys
1.5. Tutorial Walkthrough x
1.5.1. Creating a New Intel® Quartus® Prime Project 1.5.2. Creating the Qsys System 1.5.3. Creating the Top-Level Design File 1.5.4. Incorporating the Nios II SBT for Eclipse 1.5.5. Verifying Design on Hardware
1.5.4. Incorporating the Nios II SBT for Eclipse x
1.5.4.1. Adding Test Code to the Nios II SBT for Eclipse 1.5.4.2. Setting Up the Nios II Project Settings
1.5.5. Verifying Design on Hardware x
1.5.5.1. Compiling the Project 1.5.5.2. Downloading the Object File 1.5.5.3. Verifying Design with the Nios II SBT for Eclipse
1. Implementing Fractional PLL Reconfiguration with Altera PLL and Altera PLL Reconfig IP Cores

1.1.1.5.1. Waveform Example for Dynamic Reconfiguration with Avalon-MM Interface

Figure 2. Waveform Example for Performing Dynamic Reconfiguration in Reconfiguring MFRAC, M, N, and C Counters

The operation of the waveform example is as follows:

  1. Avalon-MM writes to the mode register (address = 0x00) to set the Altera PLL Reconfig IP core to operate in polling mode.
  2. Avalon-MM writes to the M counter register (address = 0x04) to reconfigure the M counter to 36.
  3. Avalon-MM writes to the M counter Fractional Value (K) register (address = 0x07) to reconfigure MFRAC to 0.2666667 (decimal value).
  4. Avalon-MM writes to the N counter register (address = 0x03) to reconfigure the N counter to 4.
  5. Avalon-MM writes to the C counter register (address=0x05) to reconfigure the C0 counter to 6 (high_count = 3, low_count = 3, even division).
  6. Avalon-MM writes to the C counter register (address=0x05) to reconfigure the C1 counter to 8 (high_count = 4, low_count = 4, even division).
  7. Avalon-MM writes to the bandwidth setting register (address=0x08) to reconfigure the bandwidth setting to medium bandwidth.
  8. Avalon-MM writes to the charge pump setting register (address=0x09) to reconfigure the charge pump setting to medium bandwidth.
  9. Avalon-MM writes to the start register (address = 0x02) to start the reconfiguration.
  10. Avalon-MM reads from the status register (address = 0x01) until a value of 1 is read from the status register, indicating a successful reconfiguration.
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