Agilex™ 3 Known Issue List

ID 855394
Date 11/14/2025
Public
Document Table of Contents

2.1.1.7. 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 10.  Device Status Table
Devices Affected Planned Fix

A3Cx100BM16Axxx

A3Cx135BM16Axxx

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