4764 - iCE40 Ultra: iCE40 Ultra does not have a GNDPLL pin, is it still recommended to use a filter on VCC_PLL using the normal GND connection?

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• 5898 - iCE40 UltraPlus: With an iCE40 Ultraplus device, how to drive an external pin with a PLL output using Radiant Software?

  There are 2 types of PLL outputs that you can use. In Radiant Software, these port outputs are named as "outcore" and "outglobal". After generating the PLL using the IP catalog, you will still need a Top-level module to instantiate the generated PLL. ...

• 1958 - [LatticeECP3] How do I find the locations of a preferred PLL and its dedicated clock input pin in a LatticeECP3 device?

  In a LatticeECP3 device each dedicated clock input pin is paired to specific PLL. This pairing occurs in a form of a dedicated connection between the clock input pin to that PLL. If a user want to use a PLL directly from a clock input pin, he or she ...

• 6897 - Radiant / PLL IP version 1.4.0 and newer: What alternatives can users use for PLL version 1.4.0 reference clock input if they cannot use the onboard oscillator (12 MHz) of the CrossLink-NX Evaluation Board as the clock input?

  Users have a couple of options for their design to use the CrossLink-NX evaluation board: 1. Use an external clock from a different clock pin: Instead of using the onboard oscillator, users can connect one of the other PCLK pins as input to the FPGA ...

• 5733 - iCE40 Ultra/UltraLite: Can the 48 MHz HFOSC be used as a reference for the internal PLL using iCEcube2 Software?

  Yes, the internal oscillator can be used as a clock source for the PLL. There are specific primitives for this (SB_PLL40_CORE and SB_PLL40_CORE), which will automatically be instantiated when we use the included PLL module generator from iCEcube2 ...

• 6436 - PLL: What is the recommended accuracy to obtain a stable reference clock as the D-PHY hard core PLL input?

  Description:The PLL of the D-PHY hard core will need a stable reference clock as its input. Does Lattice have a recommended accuracy for this reference clock? Solution:There are no specific guidelines as to the recommended accuracy for the reference ...