AN 763: Intel® Arria® 10 SoC Device Design Guidelines

ID 683192
Date 5/17/2022
Document Table of Contents

4.1. Power On Board Bring Up and Boot ROM/Boot Loader Debugging

On initial power on, if the device is in an unconfigured state, only the dedicated HPS I/Os are available to the processor. To have visibility into the boot process before the other device I/Os are configured, dedicated I/Os must be used to connect to the serial interface.

GUIDELINE: Ensure that you have connected a UART serial interface to the dedicated I/O in the HPS device in order to gain visibility into the boot process.

Note: When the HPS boots from NAND flash, the UART I/Os are not available from the HPS dedicated I/Os.