Datasheet

11
SAM9261 [DATASHEET]
Atmel-6062O-ATARM-SAM9261-Datasheet_21-Jun-16
4. Power Considerations
4.1 Power Supplies
The SAM9261 device has several types of power supply pins. Some supply pins share common ground (GND)
pins whereas others have separate grounds. See Table 4-1.
Note: 1. Desired voltage range selectable by software
The double power supplies VDDIOM and VDDIOP are identified in Table 3-1 on page 9. These supplies enable
the user to power the device differently for interfacing with memories and for interfacing with peripherals.
4.2 Power Sequence Requirements
The SAM9261 board design must comply with the guidelines described in Section 4.2.1 “Powerup Sequence” and
Section 4.2.2 “Powerdown Sequence” to guarantee reliable operation of the device. Any deviation from these
sequences may prevent the device from booting.
Table 4-1. SAM9263 Power Supply Pins
Pin(s) Item(s) powered Range Nominal Ground
VDDCORE
Core, including the processor
Embedded memories
Peripherals
1.08–1.32 V 1.2V
GND
VDDIOM External Bus Interface I/O lines
1.65–1.95 V
(1)
1.8V
3.0–3.6 V
(1)
3.3V
VDDIOP
Peripheral I/O lines
USB transceivers
2.7–3.6 V 3.3V
VDDOSC Main oscillator cells 3.0–3.6 V 3.3V GNDOSC
VDDBU
Slow Clock oscillator
Part of the System Controller
1.08–1.32 V 1.2V GNDBU
VDDPLL PLL cells 3.0–3.6 V 3.3V GNDPLL