ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 112
ATxmega64A1
Manufacturer Part Number
ATxmega64A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A1
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
78
Ext Interrupts
78
Usb Speed
No
Usb Interface
No
Spi
12
Twi (i2c)
4
Uart
8
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
4
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
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
8
Output Compare Channels
24
Input Capture Channels
24
Pwm Channels
24
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A1-AU
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
ATxmega64A1U-AU
Manufacturer:
ATMEL
Quantity:
953
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10.3
10.3.1
8077H–AVR–12/09
Battery Backup Module
Battery Backup Power-On Detection
Figure 10-1. Battery Backup Module and its power domain implementation
The Battery Backup Module consists of the following:
• A V
• A Power-switch for switching power to the battery backup domain between main power and the
• A 32.768 kHz Crystal Oscillator (XOSC) with 32.768 kHz, 1.024 kHz and 1 Hz output.
• A XOSC Failure Monitor for detecting failure on the Crystal Oscillator.
• A 32-bit Real Time Counter.
• Two Battery Backup registers.
The main BOD is used to detect Brown-Out on the main power so this must be enabled for the
power switching to work.
When main BOD is detected, the Battery Backup Module will switch to be powered from the V
pin. When main power is restored and/or the device is reset, software must enable access to the
Battery Backup Module by writing a dedicated Access Enable bit in the module.
The Battery Backup Power-On Detection circuit will set the POD Flag (BBPODF) when power is
connected to the V
TOSC1
TOSC2
VBAT
backup battery power domain. It includes
V
BAT
– A Battery Backup Power-On Detector (BBPOD).
– A sampled Battery Backup Brown-Out Detector (BBBOD).
BAT
pin.
power supervisor that ensures correct operation and detection of falling power in the
supervisor
power
V
BAT
BAT
Registers
monitor
Backup
XOSC
XOSC
RTC
pin.
Power
switch
Programming
Watchdog w/
independent
Internal
Interface
RCOSC
OCD &
RAM
Peripherals
&
CPU
EEPROM
& Fuses
supervision
Oscillator &
FLASH,
controller
power
sleep
Main
XMEGA A
XTAL1
XTAL2
VCC
GPIO
112
BAT
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