Datasheet

SAM9G45 [DATASHEET]
Atmel-6438O-ATARM-SAM9G45-Datasheet_08-Dec-15
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4. Power Considerations
4.1 Power Supplies
The SAM9G45 has several types of power supply pins. Some supply pins share common ground (GND) pins
whereas others have separate grounds. See Table 4-1.
4.2 Power Sequence Requirements
The SAM9G45 board design must comply with the guidelines described in Section 4.2.1 “Power-up Sequence” and
Section 4.2.2 “Power-down Sequence” to guarantee reliable operation of the device. Any deviation from these
sequences may lead to unpredictable results.
Table 4-1. SAM9G45 Power Supply Pins
Pin(s) Item(s) powered Range Typical Ground
VDDCORE
Core, including the processor
Embedded memories
Peripherals
0.9–1.1 V 1.0V GNDCORE
VDDIOM0 DDR2/LPDDR I/O lines 1.65–1.95 V 1.8V
GNDIOM
VDDIOM1 External Bus Interface 1 I/O lines
1.65–1.95 V 1.8V
3.0–3.6 V 3.3V
VDDIOP0, VDDIOP1, VDDIOP2 Peripherals I/O lines
1.65–1.95 V 1.8V
GNDIOP
3.0–3.6 V 3.3V
VDDBU
Slow Clock oscillator
Internal RC oscillator
Part of the System Controller
1.8–3.6 V – GNDBU7
VDDPLLUTMI PLLUTMI cell 0.9–1.1 V 1.0V
GNDOSCVDDPLLA PLLA cell 0.9–1.1 V 1.0V
VDDOSC Main Oscillator cells 1.65–3.6 V –
VDDUTMIC
USB device
Host UTMI+ core
0.9–1.1 V 1.0V
GNDUTMI
VDDUTMII
USB device
Host UTMI+ interface
3.0–3.6 V 3.3V
VDDANA Analog-to-Digital Converter 3.0–3.6 V 3.3V GNDANA