Intel® Quartus® Prime Pro Edition User Guide: Design Constraints

ID 683143
Date 10/04/2021
Public

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3.4.2.1. Early I/O Assignment Analysis Without Design Files

You can perform basic I/O legality checks before defining HDL design files. This technique produces a preliminary board layout. For example, you can specify a target device and enter pin assignments that correspond to PCB characteristics. You can reserve and assign I/O standards to each pin, and then run I/O assignment analysis to ensure that there are no I/O standard conflicts in each I/O bank.

Figure 49. Assigning and Analyzing Pin-Outs without Design Files

You must reserve all pins you intend to use as I/O pins, so that the Fitter can determine each pin type. After performing I/O assignment analysis, correct any errors reported by the Fitter and rerun I/O assignment analysis until all errors are corrected. A complete I/O assignment analysis requires all design files.

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