2.1.1 Requirements

Refer to the table “Recommended Operating Conditions on Power Supply Inputs”, in the Electrical Characteristics chapter of the SAM9X7 Series data sheet, for the power supplies needed to power the MPU.

The MPU requires only a few voltage supplies which can be split into three main categories:

• Core: VDDCORE (1.15V/1.2V depending on the working frequency)
• Memories: VDDNF (1.8V/3.3V), VDDQSPI (1.8V/3.3V), VDDIOM (1.35V/1.5V/1.8V depending on the SDRAM)
• Peripherals: VDDANA (3.3V), VDDIOP[0,2] (1.8V/3.3V), VDDIN33 (3.3V), VDDBU (1.6V-3.6V)

The same power supply can be used to power several MPU power rails. For example, the same 3.3V supply can be used to power VDDANA, VDDIOP0, VDDIOP1 and VDDBU.

VDDMIPI and VDDLVDS are supplied by the internal LDO of the MPU, which outputs 2.5V on the VDDOUT25 pin.