ATXMEGA64A3-MU Atmel, ATXMEGA64A3-MU Datasheet - Page 23
ATXMEGA64A3-MU
Manufacturer Part Number
ATXMEGA64A3-MU
Description
8-bit Microcontrollers - MCU 8/16 bit 1.6V-3.6V 64KB + 4KB
Manufacturer
Atmel
Datasheet
1.ATXMEGA64A3-MU.pdf
(134 pages)
Specifications of ATXMEGA64A3-MU
Product Category
8-bit Microcontrollers - MCU
Rohs
yes
Core
AVR
Data Bus Width
8 bit/16 bit
Maximum Clock Frequency
32 MHz
Program Memory Size
64 KB
Data Ram Size
4 KB
On-chip Adc
Yes
Package / Case
QFN EP
Mounting Style
SMD/SMT
A/d Bit Size
12 bit
A/d Channels Available
8
Data Rom Size
2 KB
Interface Type
I2C, SPI, USART
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
50
Number Of Timers
7
Processor Series
ATXMega
Program Memory Type
Flash
Factory Pack Quantity
260
Supply Voltage - Max
3.6 V
Supply Voltage - Min
1.6 V
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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
8068T–AVR–12/10
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 Sta-
tus 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 A3
23
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