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

ID 683640
Date 10/14/2019
Public
Document Table of Contents

1.1.1.2. Connecting Altera PLL and Altera PLL Reconfig IP Cores

To connect the Altera PLL and Altera PLL Reconfig instances in your design, follow these steps:

  1. Connect the reconfig_to_pll[63:0] bus on the Altera PLL Reconfig instance to the reconfig_to_pll[63:0] bus on the Altera PLL instance.
  2. Connect the reconfig_from_pll[63:0] bus on the Altera PLL instance to the reconfig_from_pll[63:0] bus on the Altera PLL Reconfig instance.
  3. Connect the mgmt_clk signal to a clock source. The mgmt_clk signal can be a free running clock, eliminating the need to control the start and stop of the mgmt_clk signal.
  4. To perform Avalon read or write operations, connect the mgmt_reset, mgmt_read_data[31:0], mgmt_write, mgmt_address[5:0], mgmt_write_data[31:0] buses, and the mgmt_wait_request and mgmt_read signals to user control logic.