6159 - CrossLink: VCCIO0 is up first and internal power good will wait for VCC and VCCaux. Based on the power sequence for Crosslink based on PCN04A-20, does it have a risk of configuration issues or power-up?

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• 1782 - MachXO: What is the IO state when VCC, VCCAUX reach the datasheet recommended levels but VCCIO has not?

  From the datasheet: https://www.latticesemi.com/view_document?document_id=9922 Typical I/O Behavior During Power-up The internal power-on-reset (POR) signal is deactivated when VCC and VCCAUX have reached satisfactory levels. After the POR signal is ...

• 5461 - Why is there a high current in the device even if the device is functionally working if VCCIO is powered before Vcc?

  The power supply sequence should be strictly followed to ensure proper device operation. One of the reasons the device requires the sequence of power-up is because the device needs to configure/be configured during power-ups. The VCC powers up first ...

• 5411 - Why does iCE40 devices heats up and have high current consumption when VCCIO and VCCIO2 are applied before VCC?

  If we look at the iCE40 datasheets, we can see that there is a correct Power Supply Sequence for the device to operate properly. VCCIO0 and VCCIO2 should only be applied after Vcc has reached a level of 0.5V or greater. Though the device may ...

• 1889 - MachXO2: I want to use the output of one Lattice MachXO2 I/O bank to control power on the board to the remaining VCCIO banks. Is this possible assuming that I will first power up the MachXO2 using only the VCC core and one

  The user can power up the Lattice MachXO2 part using only the VCC core and one VCCIO bank. There are, however, a few constraints: As per the "Typical I/O Behavior During Power-up" section of the MachXO2 Family Data Sheet, the user needs to pick ...

• 619 - What is the detailed power-up sequence for a MachXO device?

  The following is the power-up sequence for a MachXO device: - All IOs trisate with a weak pull up - POR (Power On Reset) for internal circuitry asserted - Vcc and Vccaux reach minimum recommended datasheet levels - POR (Power On Reset) for internal ...