6287 - ICE40 UltraPlus: Does any GBIN input pin can be used to drive the reference clock input to the PLL?

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• 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 ...

• 6430 - CertusPro-NX / ADC: Why is a PLL used to drive the ADC adc_clk_i pin and not directly driven by an oscillator output?

  Description:This article explains the reason ADC clock-in cannot be driven using an oscillator output in CertusPro-NX. Solution:In CertusPro-NX., the ADC clock input is hard-wired on the fabric to the 4th secondary output (CLKOS4) of the Lower Right ...

• 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 ...

• 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. ...

• 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 ...