Agilex™ 5 Known Issue List

ID 849494
Date 11/24/2025
Public
Document Table of Contents

2.1.1.11. IEEE 1588v2 PTP Accuracy Issue for GTS Ethernet Hard IP for 10GE Rate Designs

Description

When the System PLL is set to 491 MHz, the IEEE 1588v2 PTP accuracy may exceed 1.5 ns during certain reset iterations in the GTS Ethernet Hard IP for 10GE operating in Dynamically Reconfigurable mode without FEC with PTP enabled. You may encounter this issue when using Quartus® Prime Pro Edition software version 25.3 and earlier.

Workaround

None. Altera recommends using the nominal System PLL frequency, set to its default value (256.25 MHz).

Status

Table 14.  Device Status Table
Devices Affected Planned Fix

A5EC008xxxxxxxx

A5EC013xxxxxxxx

A5ED008xxxxxxxxCS

A5ED013xxxxxxxxCS

This issue is planned to be fixed in a future release of the Quartus® Prime Pro Edition software