429 - Does input threshold of an IO pin depend on Vcco value?

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• 6161 - iCE40 UltraPlus: How utilize Differential Input pairs on an iCE40 device?

  For iCEcube2 compatible devices (LP/HX/LM/Ultra/UltraLite/UltraPlus), the user needs to use the SB_IO primitive and override the IO_STANDARD parameter to SB_LVDS_INPUT as shown in the rudimentary example below: SB_IO SB_IO_inst ( ...

• 1946 - [LatticeECP3/LatticeECP2/MachXO2/XP2] Are there hardware resources that helps me to achieve my input HOLD requirements?

  Yes, there are such resources in select Lattice devices. There are three different resources that you can use to do this. They are: 1). FIXEDDELAY: Supported in ECP3, MachXO2, and XP2 devices. 2). DELAYC: Supported in ECP3 devices. 3). DELAYB: ...

• 5867 - ispMach400: In BSDL file, if any IOs are configured as "Input Only"; Does the device needs to be erased and re-programmed to bi-directional pin the same as the output?

  The Input only IO, do not need to be erased and reprogrammed to be bi-di IO. Only output only IO needs it.

• 5846 - All Devices: Can Lattice FPGA IO pins be left Floating?

  Floating IO pin is not recommended. If IO pins are left floating, then the input transistors might fall outside of the saturation or cut-off region. As a result, the device could draw additional current and increase the device's power consumption. If ...

• 2347 - MachXO2: Why does the Lattice software picks VCCIO bank voltages smaller than 3.3V when all my design IO buffers are of the 3.3V type?

  Description:The situation above can occur when you set your IO buffer HYSTERESIS attribute to NA. You can normally set your IO buffer HYSTERISIS attribute using one of the three methods shown below: ispLEVER software: Start the Design Planner target ...