AT32UC3B1128 Atmel Corporation, AT32UC3B1128 Datasheet - Page 16

• Manufacturer Part Number: AT32UC3B1128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3B1128

• Flash (kbytes): 128 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 60 MHz
• Cpu: 32-bit AVR
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 32
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Operating Voltage (vcc): 3.0-3.6 or (1.65-1.95+3.0-3.6)
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 10
• Output Compare Channels: 16
• Input Capture Channels: 6
• Pwm Channels: 13
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

5.6.2.2
5.6.3
32059L–AVR32–01/2012
Analog-to-Digital Converter (ADC) reference.
Dual Power Supply
Refer to
For decoupling recommendations for VDDIO, VDDANA, VDDCORE and VDDPLL, please refer
to the Schematic checklist.
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.
0.5
3.5
2.5
1.5
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
16