ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 436

• Manufacturer Part Number: ATXMEGA256A3B-MH
• Description: MCU AVR 256KB FLASH A3B 64-QFN
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA256A3B-MH

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 256KB (128K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 16x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Processor Series: ATXMEGA256x
• Core: AVR8
• Data Bus Width: 8 bit, 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 49
• Number Of Timers: 7
• Operating Supply Voltage: 1.6 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 12 bit, 2 Channel
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATXMEGA256A3B-MU; ATXMEGA256A3B-MU

8077H–AVR–12/09
7
8
9
System Clock and Clock options ......................................................... 76
Power Management and Sleep ............................................................. 95
Reset System ....................................................................................... 102
6.1
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
Features ..........................................................................................................65
Overview ..........................................................................................................65
Events ..............................................................................................................66
Event Routing Network ....................................................................................67
Event Timing ....................................................................................................69
Filtering ............................................................................................................69
Quadrature Decoder ........................................................................................69
Register Description ........................................................................................71
Register Summary ...........................................................................................75
Features ..........................................................................................................76
Overview ..........................................................................................................76
Clock Distribution .............................................................................................77
Clock Sources .................................................................................................78
System Clock Selection and Prescalers ..........................................................80
PLL with 1-31x Multiplication Factor ................................................................81
DFLL 2 MHz and DFLL 32 MHz ......................................................................81
External Clock Source Failure Monitor ............................................................82
Register Description - Clock ............................................................................84
Register Description - Oscillator ......................................................................87
Register Description - DFLL32M/DFLL2M ......................................................92
Register Summary - Clock ...............................................................................94
Register Summary - Oscillator .........................................................................94
Register Summary - DFLL32M/DFLL2M .........................................................94
Crystal Oscillator Failure Interrupt Vector Summary .......................................94
Features ..........................................................................................................95
Overview ..........................................................................................................95
Sleep Modes ....................................................................................................95
Power Reduction Registers .............................................................................97
Register Description – Sleep ...........................................................................97
Register Description – Power Reduction .........................................................98
Register Summary - Sleep ............................................................................101
Register Summary - Power Reduction ..........................................................101
XMEGA A
iii