Delay Cell
1366 - How do I calculate the power consumption of a Power Manager device?
The total power drawn by any device is the sum of the individual supply voltages multiplied by the supply currents. Because Power Manager devices operate at a fixed clock frequency, there are no issues with dynamic vs. static power consumption. For ...
2810 - With the iCE40 device,why do I see more LUTs utilized in my design than actually required?
This is true when your design is more of sequential nature, where more DFFs (D Flip-Flops) are used. The basic architecture of the iCE40 Logic Cell does not allow a direct and independent access to the DFFs. Refer to Datasheet DS1045 and DS1040 for ...
739 - What is the default I/O state in a blank MachXO device?
The silicon default of a bulk-erased MachXO device is as follows: Inputs are enabled, and referenced to Vccio. Buskeepers default to pullup. Outputs are tri-stated and default to 8ma at Vccio=1.8V and slow slew.
725 - Does the MachXO device family support true LVDS buffers?
The larger two devices (LCMXO1200 & LCMXO2280) in the MachXO family support True LVDS I/O. To set up "true LVDS" on the input side, connect a 100 ohm terminating resistor across the 'true' and 'compliment' input terminals. On the output side, no ...
1265 - Is there any non-volatile setting provided by the LatticeECP2/M to set permanent pull-up resistors on the I/O pins before the device is programmed?
The LatticeECP2/M does not have a way to configure pull-up resistors on the I/O prior to the device being programmed. The LatticeECP2/M and LatticeSC/SCM do support hot socketing (or hot-swap). During power-up and power-down sequences, the I/Os ...
1254 - How to define different VCCIO voltage in different IO bank for FPGA such as SC/ECP2/ECP2M/ECP3 devices? Why is it necessary?
When running ispLEVER software tool, edit the project preference file *.lpf by following the example below to add these preference to set the BANK voltages to match the circuit board design and how the device is connected on board: BANK 0 VCCIO 3.3 ...
671 - What is the minimum reset pulse width needed to reset a POWR605?
To reliably reset the POWR605, you should use a minimum of a 10us wide reset pulse. While a faster pulse (as short as a few hundred nanoseconds) will often reset the part, a 10us minimum should be used to ensure reliable operation.