AN 796: Cyclone® V and Arria® V SoC Device Design Guidelines

ID 683360
Date 3/30/2022
Document Table of Contents BSEL Options

GUIDELINE: Configure the BSEL pins for the selected boot source.

The boot source is selected by means of BSEL pins.

It may be beneficial to change the boot source for debugging purposes, even if the board does not have available another boot source. For example, on a board booting from QSPI it may be beneficial to select the reserved boot so that BootROM would not do anything. Or select boot from FPGA and put a test image in the FPGA fabric.

If the system allows it (space constraints etc.) plan to provide either switches or at least resistors to be able to change BSEL as needed.

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