Atum A5 FAQ01

== Troubleshooting ==

=== 2.5G Ethernet Connectivity Issues ===

If you encounter issues with the 2.5G Ethernet functionality on the Atum A5 development kit, please verify the hardware switch settings first.

==== Problem Description ====
The 2.5G Ethernet interface fails to establish a link or is unable to transmit data.

==== Solution ====
Please ensure that the '''SW26''' slide switch is configured correctly. This switch is used to set the Ethernet PHY address (PHY_ADR). If the setting is incorrect, the system will fail to identify the PHY chip properly.


[[File:Atum A5 2.5G Ethernet Connectivity Issues.png|400px]]


'''Correct Switch Settings:'''
Set '''SW26.1 to ON''', and ensure all other switches (SW26.2, SW26.3, SW26.4) are set to '''OFF'''.

{| class="wikitable" style="text-align: center;"
|+ Table 2-6 SW26 Settings
! Switch !! State !! Description
|-
| '''SW26.1''' || '''ON''' || '''Select 000 for PHYAD[4:2]'''
|-
| SW26.2 || OFF || Deselect 001 for PHYAD[4:2]
|-
| SW26.3 || OFF || Deselect 010 for PHYAD[4:2]
|-
| SW26.4 || OFF || Deselect 111 for PHYAD[4:2]
|}