Agilex 3: VCCBAT pin for the battery-backed key storage.

Hello Everyone,

I’ve been looking into Agilex 3 devices and noticed that the VCCBAT pin for the battery-backed key storage is missing from the pin lists.

We've checked the pinouts for the A3CZ, A3CV, A3CW, and A3CY device families in both the 100 and 135 package sizes, and none of them include a VCCBAT pin. At the same time, when reviewing the power tree in the Agilex 3 PCB Design Guidelines (https://docs.altera.com/r/docs/853726/current/pcb-design-guidelines/power-tree), the VCCBAT supply is shown in the diagram and described in the accompanying table, similar to what was done for Agilex 5 devices.

Does this mean that Agilex 3 devices do not support storing an encryption key in BBRAM and only support a permanent key stored in fuses?

Or are we looking at the wrong device variants? Are there specific Agilex 3 devices (or package options) with additional security features that support a battery-backed key and therefore include a VCCBAT pin?

Thanks in advance,

Tomasz