ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 18

• 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

4. Memories
4.1
4.2
8077H–AVR–12/09
Features
Overview
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This section describes the different memories in XMEGA. The AVR architecture has two main
memory spaces, the Program Memory and the Data Memory. Executable code can only reside
in the Program Memory, while data can be stored both in the Program Memory and the Data
Memory. The Data Memory includes both SRAM, and an EEPROM Memory for non-volatile data
storage. All memory spaces are linear and require no paging. Non-Volatile Memory (NVM)
Flash Program Memory
Data Memory
Production Signature Row Memory for factory programmed data
User Signature Row
– One linear address space
– In-System Programmable
– Self-Programming and Bootloader support
– Application Section for application code
– Application Table Section for application code or data storage
– Boot Section for application code or bootloader code
– Separate lock bits and protection for all sections
– Built in fast CRC check of a selectable flash program memory section
– One linear address space
– Single cycle access from CPU
– SRAM
– EEPROM
– I/O Memory
– External Memory support
– Bus arbitration
– Separate buses for SRAM, EEPROM, I/O Memory and External Memory access
Byte and page accessible
Optional memory mapping for direct load and store
Configuration and Status registers for all peripherals and modules
16 bit-accessible General Purpose Register for global variables or flags
SRAM
SDRAM
Memory mapped external hardware
Safe and deterministic handling of CPU and DMA Controller priority
Simultaneous bus access for CPU and DMA Controller
Device ID for each microcontroller device type
Serial number for each device
Oscillator calibration bytes
ADC, DAC and temperature sensor calibration data
One flash page in size
Can be read and written from software
Content is kept after chip erase
XMEGA A
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