5308 - MachXO2: How to use an internal oscillator in the designs?

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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 ...

• 5931 - ICE40: Where can we change the configuration oscillator clock frequency for iCE40 Devices?

  Solution: Depending on what software you are using, (Radiang Software or iCEcube2), you can change the configuration oscillator clock frequency using these steps. Radiant Software: Go to Project > Active Stratefy > Bitstream Settings > Oscillator ...

• 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 ...

• 1771 - MachXO: are the charge pumps and oscillators working after configuration? 

  When the PLL is in power down (default when it is not used), the current to PLL is turned off, and the VCO and Charge Pump is not running. After programming completes, there is a dedicated global bit to disable the oscillator. Oscillator is turned ...

• 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 ...