AT32UC3A3256-ALUT Atmel, AT32UC3A3256-ALUT Datasheet - Page 25

• Manufacturer Part Number: AT32UC3A3256-ALUT
• Description: IC MCU AVR32 256KB FLASH 144LQFP
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3A3256-ALUT

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: EBI/EMI, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, POR, WDT
• Number Of I /o: 110
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• 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 Timers: 4
• Operating Supply Voltage: 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
• Controller Family/series: AVR UC3
• No. Of I/o's: 110
• Ram Memory Size: 128KB
• Cpu Speed: 66MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• Package: 144LQFP
• Device Core: AVR
• Family Name: AT32
• Maximum Speed: 66 MHz
• Number Of Programmable I/os: 110
• On-chip Adc: 8-chx10-bit
• For Use With: ATEVK1104 - KIT DEV/EVAL FOR AVR32 AT32UC3AATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATEVK1100 - KIT DEV/EVAL FOR AVR32 AT32UC3A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5. Power Considerations
5.1
5.2
32072C–AVR32–2010/03
Power Supplies
Voltage Regulator
The AT32UC3A3/A4 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.
3.3V
1.8
V
C
C
OUT2
IN2
C
C
IN1
OUT1
ONREG
OUT1
OUT2
) should be connected as close to the
VDDCORE
).
VDDIN
AT32UC3A3/A4
Regulator
1.8V
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