ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 95

• 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

8. Power Management and Sleep
8.1
8.2
8.3
8077H–AVR–12/09
Features
Overview
Sleep Modes
•
•
XMEGA provides various sleep modes and software controlled clock gating in order to tailor
power consumption to the application's requirement. Sleep modes enables the microcontroller to
shut down unused modules to save power. When the device enters sleep mode, program exe-
cution is stopped and interrupts or reset is used to wake the device again. The individual clock to
unused peripherals can be stopped during normal operation or in sleep, enabling a much more
fine tuned power management than sleep modes alone.
Sleep modes are used to shut down modules and clock domains in the microcontroller in order
to save power. XMEGA has five different sleep modes. A dedicated Sleep instruction (SLEEP) is
available to enter sleep. Before executing SLEEP, the selected sleep mode to enter must be
configured. The available interrupt wake-up sources is dependent on the selected sleep mode.
When an enabled interrupt occurs the device will wake up and execute the interrupt service rou-
tine before continuing normal program execution from the first instruction after the SLEEP
instruction. If other higher priority interrupts are pending when the wake-up occurs, their interrupt
service routines will be executed according to their priority before the interrupt service routine for
the wake-up interrupt is executed. After wake-up the CPU is halted for four cycles before execu-
tion starts.
5 sleep modes
Power Reduction register to disable clock to unused peripherals
– Idle
– Power-down
– Power-save
– Standby
– Extended standby
XMEGA A
95