ATxmega128A1 Atmel Corporation, ATxmega128A1 Datasheet - Page 23
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ATxmega128A1
Manufacturer Part Number
ATxmega128A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128A1
Flash (kbytes)
128 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)
8
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
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Company
Part Number
Manufacturer
Quantity
Price
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Company:
Part Number:
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Atmel
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Company:
Part Number:
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101
12. System Control and Reset
12.1
12.2
12.3
12.3.1
12.3.2
12.3.3
12.3.4
12.3.5
8067M–AVR–09/10
Features
Resetting the AVR
Reset Sources
Power-On Reset
External Reset
Watchdog Reset
Brown-Out Reset
PDI reset
•
•
•
During reset, all I/O registers are set to their initial values. The SRAM content is not reset. Appli-
cation execution starts from the Reset Vector. The instruction placed at the Reset Vector should
be an Absolute Jump (JMP) instruction to the reset handling routine. By default the Reset Vector
address is the lowest Flash program memory address, ‘0’, but it is possible to move the Reset
Vector to the first address in the Boot Section.
The I/O ports of the AVR are immediately tri-stated when a reset source goes active.
The reset functionality is asynchronous, so no running clock is required to reset the device.
After the device is reset, the reset source can be determined by the application by reading the
Reset Status Register.
The MCU is reset when the supply voltage VCC is below the Power-on Reset threshold voltage.
The MCU is reset when a low level is present on the RESET pin.
The MCU is reset when the Watchdog Timer period expires and the Watchdog Reset is enabled.
The Watchdog Timer runs from a dedicated oscillator independent of the System Clock. For
more details see
The MCU is reset when the supply voltage VCC is below the Brown-Out Reset threshold voltage
and the Brown-out Detector is enabled. The Brown-out threshold voltage is programmable.
The MCU can be reset through the Program and Debug Interface (PDI).
Multiple reset sources for safe operation and device reset
Asynchronous reset
Reset status register
– Power-On Reset
– External Reset
– Watchdog Reset
– Brown-Out Reset
– PDI reset
– Software reset
– No running clock in the device is required for reset
The Watchdog Timer runs from separate, dedicated oscillator
Accurate, programmable Brown-Out levels
“WDT - Watchdog Timer” on page
24.
XMEGA A1
23