SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 15

• Manufacturer Part Number: SAM3SD8B
• Manufacturer: Atmel Corporation

11090AS–ATARM–10-Feb-12
Figure 5-1.
Note:
Figure 5-2.
Note:
Figure 5-3
Since the PIO state is preserved when in backup mode, any free PIO line can be used to switch
off the external regulator by driving the PIO line at low level (PIO is input, pull-up enabled after
backup reset). External wake-up of the system can be from a push button or any signal. See
Section 5.6 “Wake-up Sources”
Restrictions
With Main Supply < 2.0 V, USB and ADC/DAC and Analog comparator are not usable.
With Main Supply ≥ 2.0V and < 3V, USB is not usable.
With Main Supply ≥ 3V, all peripherals are usable.
Restrictions
With Main Supply < 2.0V, USB is not usable.
With VDDIN < 2.0V, ADC, DAC and Analog comparator are not usable.
With Main Supply ≥ 2.0V and < 3V, USB is not usable.
With Main Supply and VDDIN ≥ 3V, all peripherals are usable.
below provides an example of the powering scheme when using a backup battery.
Single Supply
Core Externally Supplied
ADC, DAC, Analog
Comparator Supply
(2.0V-3.6V)
VDDCORE Supply
(1.62V-1.95V)
Main Supply
(1.62V-3.6V)
Main Supply
(1.8V-3.6V)
Can be the
same supply
for further details.
VDDIO
VDDIN
VDDOUT
VDDCORE
VDDPLL
VDDIO
VDDIN
VDDOUT
VDDCORE
VDDPLL
SAM3S8/SD8 Summary
Analog Comp.
Transceivers.
Regulator
ADC, DAC
Voltage
Analog Comp.
Transceivers.
USB
Regulator
ADC, DAC
Voltage
USB
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