Atum A5 FAQ01

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Contents 1 Troubleshooting 1.1 2.5G Ethernet Connectivity Issues 1.1.1 Problem Description 1.1.2 Solution

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.

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

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]