ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 495

• Manufacturer Part Number: ATxmega256A3BU
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3BU

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 47
• Ext Interrupts: 49
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 8
• Twi (i2c): 2
• Uart: 6
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

8331A–AVR–07/11
7
8
9
System Clock and Clock Options ......................................................... 81
Power Management and Sleep Modes ............................................... 103
Reset System ....................................................................................... 111
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
7.15
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
Overview ..........................................................................................................69
Events ..............................................................................................................70
Event Routing Network ....................................................................................72
Event Timing ....................................................................................................74
Filtering ............................................................................................................74
Quadrature Decoder ........................................................................................74
Register Description ........................................................................................76
Register Summary ...........................................................................................80
Features ..........................................................................................................81
Overview ..........................................................................................................81
Clock Distribution .............................................................................................83
Clock Sources .................................................................................................83
System Clock Selection and Prescalers ..........................................................85
PLL with 1x-31x Multiplication Factor ..............................................................86
DFLL 2MHz and DFLL 32MHz ........................................................................87
PLL and External Clock Source Failure Monitor ..............................................88
Register Description - Clock ............................................................................90
Register Description — Oscillator ....................................................................94
Register Description – DFLL32M/DFLL2M ......................................................99
Register Summary - Clock .............................................................................102
Register Summary - Oscillator .......................................................................102
Register Summary - DFLL32M/DFLL2M .......................................................102
Oscillator Failure Interrupt Vector Summary .................................................102
Features ........................................................................................................103
Overview ........................................................................................................103
Sleep Modes ..................................................................................................103
Power Reduction Registers ...........................................................................105
Minimizing Power Consumption ....................................................................105
Register Description – Sleep .........................................................................107
Register Description – Power Reduction .......................................................107
Register Summary - Sleep ............................................................................110
Register Summary - Power Reduction ..........................................................110
Atmel AVR XMEGA AU
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