Why does the 'Number of tags supported' parameter only show up to 64 for non-posted requests in the Intel® Arria® 10 and Intel® Cyclone® 10 GX Avalon®-ST Interface for PCI Express*?

Description

The Intel® Arria® 10 and Intel® Cyclone® 10 GX Avalon®-ST Interface for PCI Express* supports up to 64 tags for non-posted requests internally. To get up to 256 tags, you need to check the 'Enable Configuration Bypass (CfgBP)' parameter and implement the tag tracking mechanism in user logic.

Resolution

This information has been added to the Intel® Arria® 10 and Intel® Cyclone® 10 GX Avalon® Streaming Interface for PCI Express* User Guide version 2018.12.28.