AT32UC3A3256S-ALUR Atmel, AT32UC3A3256S-ALUR Datasheet - Page 22
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AT32UC3A3256S-ALUR
Manufacturer Part Number
AT32UC3A3256S-ALUR
Description
IC MCU 256KB FLASH 144LQFP
Manufacturer
Atmel
Series
AVR®32 UC3r
Datasheet
1.AT32UC3A364-CTUR.pdf
(75 pages)
Specifications of AT32UC3A3256S-ALUR
Package / Case
144-LQFP
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Operating Temperature
-40°C ~ 85°C
Speed
66MHz
Number Of I /o
110
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
128K x 8
Program Memory Size
256KB (256K x 8)
Data Converters
A/D 8x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, DMA, POR, WDT
Connectivity
EBI/EMI, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB OTG
Core Size
32-Bit
Processor Series
AT32UC3x
Core
AVR32
Data Bus Width
32 bit
Data Ram Size
64 KB
Interface Type
2-Wire, I2S, JTAG, SPI, USART
Maximum Clock Frequency
66 MHz
Number Of Programmable I/os
23
Number Of Timers
4
Operating Supply Voltage
- 0.3 V to + 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR32, EWAVR32-BL, KSK-EVK1100-PL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATEXTWIFI, ATEVK1104
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
4.4
4.4.1
4.4.2
32072AS–AVR32–03/09
Power Considerations
Power Supplies
Voltage Regulator
The AT32UC3A3 has several types of power supply pins:
•
•
•
•
The ground pins GNDCORE are common to VDDCORE and VDDIN. The ground pin for
VDDANA is GNDANA. The ground pin for VDDIO is GNDIO.
Refer to Electrical Characteristics chapter for power consumption on the various supply pins.
The AT32UC3A3 embeds a voltage regulator that converts from 3.3V to 1.8V with a load of up
to 100 mA. The regulator takes its input voltage from VDDIN, and supplies the output voltage on
VDDCORE and powers the core, memories and peripherals.
Adequate output supply decoupling is mandatory for VDDCORE to reduce ripple and avoid
oscillations.
The best way to achieve this is to use two capacitors in parallel between VDDCORE and
GNDCORE:
Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability
and reduce source voltage drop.
The input decoupling capacitor should be placed close to the chip, e.g., two capacitors can be
used in parallel (100nF NPO and 4.7µF X7R).
ONREG input must be tied to VDDIN.
• One external 470pF (or 1nF) NPO capacitor (C
• One external 2.2µF (or 3.3µF) X7R capacitor (C
VDDIO: Powers I/O lines. Voltage is 3.3V nominal
VDDANA: Powers the ADC Voltage and provides the ADVREF voltage is 3.3V nominal
VDDIN: Input voltage for the voltage regulator. Voltage is 3.3V nominal
VDDCORE: Output voltage from regulator for filtering purpose and provides the supply to the
core, memories, and peripherals. Voltage is 1.8V nominal
chip as possible.
1.8V
3.3V
C
C
OUT2
IN2
C
C
IN1
OUT1
ONREG
OUT1
OUT2
) should be connected as close to the
VDDCORE
).
VDDIN
Regulator
AT32UC3A3
1.8V
22