ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 122
ATxmega64A4U
Manufacturer Part Number
ATxmega64A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A4U
Flash (kbytes)
64 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
2
Uart
5
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A4U-AU
Manufacturer:
ON
Quantity:
29 000
Company:
Part Number:
ATxmega64A4U-U
Manufacturer:
ATMEL
Quantity:
74
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10.5.2
8331A–AVR–07/11
Main Power Restore and Start-up Sequence
At every startup after main power is restored, the software should:
1. Control the main reset source to determine that a POR or BOD took place.
2. Check for power on the V
3. Read the power supervisor flags to determine further software action:
a. If all power supervision flags are cleared, the battery backup system runs as nor-
b. If any power supervision flags are set, it indicates the battery backup system has
mal. The software should enable access to the battery backup system and check
the crystal oscillator failure flag. If the flag is set, the software should assume that
the RTC counter value is invalid and take appropriate action.
lost power sometime during the period when the rest of the device was unpower-
erd. Software should assume that the configuration and RTC value are invalid and
take appropriate action.
BAT
pin by reading the BBPWR flag.
Atmel AVR XMEGA AU
122
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