6807 - PLL for MachXO3: Is there a way to use the VCO output directly to the user logic?

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• 6506 - PLL: When will the reset of the PLL be released? If the reset is released before the input clock to the PLL stabilizes (or is input), the PLL does not output the clock and Lock signals.

  Definition: When will the reset of the PLL be released? If the reset is released before the input clock to the PLL stabilizes (or is input), the PLL does not output the clock and Lock signals. Solution: Please find section 14.5.3 of FPGA-TN-02095 on ...

• 6441 - PLL for Nexus FPGAs: How to dynamically change the PLL output frequency?

  Description: On FPGA-TN-02095, locate Appendix C. PLL LMMI Operation. The user can access the PLL dynamic parameters through the use of LMMI (Lattice Memory Mapped Interface). Solution: If the user wants to vary the output frequency (for example ...

• 3899 - iCECube2 / iCE40 / PLL: What is the difference between selecting "PACKAGEPIN" and "General Purpose IO Pad or Core Logic" options during PLL generation?

  Solution: If the "Dedicated Clock Pad (single ended)" is selected during the PLL generation, the IO pin connected to the PLL's "PACKAGEPIN" becomes dedicated and hence, the signal coming in from that IO pin can't be used for any other logic design in ...

• 6192 - All Nexus: How to use the dynamic phase of PLL outputs?

  See Section - Dynamic Phase Adjustment of PLL user guide that explains the use of Dynamic Phase for PLL. Dynamic phase adjustment of the PLL output clocks can be done without reconfiguring the FPGA by using the dedicated dynamic phase-shift ports of ...

• 3815 - For the MachXO2 device, how to make dynamic changes to the PLL output frequency? Can the PLL be dynamically controlled by changing the registers? Is a reset required for the PLL after changing these registers

  The MachXO2 device has an option to make dynamic update to the PLL. Registers 0 through 11 are user accessible registers. The remaining registers are reserved for Lattice use or read-only access, and the user cannot write these. For more information, ...