Agilex™ 7 Device Configuration via Protocol (CvP) Implementation User Guide

ID 683763
Date 4/01/2024
Document Table of Contents

2.2.2. CvP Update Mode

CvP update mode is a reconfiguration scheme that allows a host device to deliver an updated bitstream to a target FPGA device after the device enters user mode. In this mode, the FPGA device initializes by loading the full configuration image from the external local configuration device to the FPGA or after CvP initialization. Prior CvP initialization is not a prerequisite for performing a CvP update.

In user mode, the PCIe* links are available for normal PCIe* applications. You can use the CvP PCIe* link to perform an FPGA core image update. To perform the FPGA core image update, you can create one or more FPGA core images in the Quartus® Prime Pro Edition software that have identical connections to the periphery image.

Figure 2. Periphery and Core Image Storage Arrangement for CvP Core Image UpdateThe periphery image remains the same for different core image updates. If you change the periphery image, you must reprogram the local configuration device with the new periphery image.

For Agilex™ 7 designs that include the HPS, it is important to note that performing an FPGA core image update also causes the HPS to be reconfigured. The updated bitstream contains both the FPGA core data as well as the First Stage Bootloader (FSBL) used by the HPS.