AT32UC3B0512-A2UES ATMEL [ATMEL Corporation], AT32UC3B0512-A2UES Datasheet - Page 16
AT32UC3B0512-A2UES
Manufacturer Part Number
AT32UC3B0512-A2UES
Description
32-bit AVR Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT32UC3B0512-A2UES.pdf
(91 pages)
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5.6.2.2
5.6.3
Analog-to-Digital Converter (ADC) reference.
Dual Power Supply
Refer to
In case of dual power supply, VDDIN and VDDOUT should be connected to ground to prevent
from leakage current.
To avoid over consumption during the power up sequence, VDDIO and VDDCORE voltage dif-
ference needs to stay in the range given
Figure 5-3.
The ADC reference (ADVREF) must be provided from an external source. Two decoupling
capacitors must be used to insure proper decoupling.
Figure 5-4.
Refer to
In case ADC is not used, the ADVREF pin should be connected to GND to avoid extra
consumption.
3.5
2.5
1.5
0.5
2
4
3
1
0
Section 9.3 on page 38
Section 9.4 on page 38
0
VDDIO versus VDDCORE during power up sequence
ADVREF Decoupling
Extra consumption on VDDIO
0.2
3.3V
0.4
C
VREF2
for decoupling capacitors values and regulator characteristics.
for decoupling capacitors values and electrical characteristics.
0.6
C
VREF1
Figure
0.8
VDDCORE (V)
5-3.
ADVREF
Extra consumption on VDDCORE
1
1.2
1.4
1.6
1.8
2
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