AN 307: Intel® FPGA Design Flow for AMD* Xilinx* Users

ID 683562
Date 4/01/2024
Public
Document Table of Contents

4.3.1. Device Constraints

The following table summarizes the most common AMD* Xilinx* device constraints and Intel® FPGA equivalent device constraints.

Table 59.   Intel® FPGA Equivalent Device Constraints
AMD* Xilinx* Constraint Intel® FPGA Constraint Description
Assignment Name QSF Variable
DRIVE Current Strength CURRENT_STRENGTH_NEW Controls the output pin current value
SLEW Slew Rate SLEW_RATE Turns on Fast Slew Rate Control.
IOB Fast Input Register

Fast Output Register

FAST_INPUT_REGISTER

FAST_OUTPUT_REGISTER

Specifies whether the Compiler places a register in the device's IOB.
IOSTANDARD IO Standard IO_STANDARD Specifies the I/O standard for an I/O pin
KEEP Implement as Output of Logic Cell "attribute keep" (VHDL)

"synthesis keep" (Verilog)

Prevents a net from either being absorbed by a block or synthesized out.

To set or modify a device constraint, use the Quartus® Prime Assignment Editor. Alternatively, you can edit the .qsf file.