Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet
Product codes
ATSAM4E-XPRO
15
SAM4E [DATASHEET]
Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14
5.
Power Considerations
5.1
Power Supplies
The SAM4E has several types of power supply pins:
VDDCORE pins: power the core, the first flash rail, the embedded memories and the peripherals.
Voltage ranges from 1.08V to 1.32V.
Voltage ranges from 1.08V to 1.32V.
VDDIO pins: power the peripheral I/O lines (Input/Output Buffers), the second flash rail, the backup part, the
USB transceiver, 32 kHz crystal oscillator and oscillator pads.
Voltage ranges from 1.62V to 3.6V.
USB transceiver, 32 kHz crystal oscillator and oscillator pads.
Voltage ranges from 1.62V to 3.6V.
VDDIN pins: voltage regulator input, DAC and Analog Comparator power supply.
Voltage ranges from 1.62V to 3.6V.
Voltage ranges from 1.62V to 3.6V.
VDDPLL pin: powers the PLL, the Fast RC and the 3 to 20 MHz oscillator.
Voltage ranges from 1.08V to 1.32V.
Voltage ranges from 1.08V to 1.32V.
5.2
Voltage Regulator
The SAM4E embeds a voltage regulator that is managed by the Supply Controller.
This internal regulator is designed to supply the internal core of SAM4E It features two operating modes:
In Normal mode, the voltage regulator consumes less than 500 µA static current and draws 80 mA of output
current. Internal adaptive biasing adjusts the regulator quiescent current depending on the required load
current. In Wait Mode quiescent current is only 5 µA.
current. Internal adaptive biasing adjusts the regulator quiescent current depending on the required load
current. In Wait Mode quiescent current is only 5 µA.
In Backup mode, the voltage regulator consumes less than 1.5 µA while its output (VDDOUT) is driven
internally to GND. The default output voltage is 1.20V and the start-up time to reach Normal mode is less
than 300 µs.
internally to GND. The default output voltage is 1.20V and the start-up time to reach Normal mode is less
than 300 µs.
For adequate input and output power supply decoupling/bypassing, refer to the “Voltage Regulator” section in the
“Electrical Characteristics” section of the datasheet.
“Electrical Characteristics” section of the datasheet.
5.3
Typical Powering Schematics
The SAM4E supports a 1.62V-3.6V single supply mode. The internal regulator input is connected to the source
and its output feeds VDDCORE.
and its output feeds VDDCORE.
below
shows the power schematics.
As VDDIN powers the voltage regulator, the DAC and the analog comparator, when the user does not want to use
the embedded voltage regulator, it can be disabled by software via the SUPC (note that this is different from
Backup mode).
the embedded voltage regulator, it can be disabled by software via the SUPC (note that this is different from
Backup mode).
Figure 5-1.
Single Supply
Main Supply
(1.8V-3.6V)
(1.8V-3.6V)
ADC, DAC
Analog Comp.
USB
Transceivers
VDDIN
Voltage
Regulator
VDDOUT
VDDCORE
VDDIO
VDDPLL