ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 96

• Manufacturer Part Number: ATxmega256A3
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3

• 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: 50
• Ext Interrupts: 50
• Usb Speed: No
• Usb Interface: No
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• 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

8.3.1
8.3.2
8.3.3
8077H–AVR–12/09
Idle Mode
Power-down Mode
Power-save Mode
Table 8-1 on page 96
and wake-up sources.
Table 8-1.
The wake-up time for the device is dependent on the sleep mode and the main clock source.
The start-up time for the system clock source must be added to the wake-up time for sleep
modes where the clock source is stopped. For details on the start-up time for the different oscil-
lators options refer to
The content of the Register File, SRAM and registers are kept during sleep. If a reset occurs
during sleep, the device will reset, start up and execute from the Reset Vector.
In Idle mode the CPU and Non-Volatile Memory are stopped, (note that any active programming
will be completed) but all peripherals including the Interrupt Controller, Event System and DMA
Controller are kept running. Any interrupt request interrupts will wake the device.
In Power-down mode all system clock sources, including the Real Time Counter clock source
are stopped. This allows operation of asynchronous modules only. The only interrupts that can
wake up the MCU are the Two Wire Interface address match interrupts, and asynchronous port
interrupts.
Power-save mode is identical to Power-down, with one exception:
If the Real Time Counter (RTC) is enabled, it will keep running during sleep and the device can
also wake up from either RTC Overflow or Compare Match interrupt.
Sleep modes
Idle
Power-down
Power-save
Standby
Extended Standby
Active clock domains and wake-up sources in the different sleep modes.
”System Clock and Clock options” on page
shows the different sleep modes and the active clock domains, oscillators
Active clock domain
X
X
X
X
X
X
X
Oscillators
X
X
X
76.
X
X
X
X
X
Wake-up sources
XMEGA A
X
X
X
X
X
X
X
X
X
96