In the context of DDR5 memory modules, the PMIC (Power Management Integrated Circuit) is managed via a sideband bus (I2C or I3C). "2-Byte Address" typically refers to the register addressing mechanism used to access the PMIC's internal configuration .

This blog introduces how to Testing DDR5 PMIC 2-Byte address based on Tower I3C Host Adapter:

Testing DDR5 PMIC 2-Byte address based on Tower I3C Host Adapter.