ATXMEGA32A4-CUR Atmel, ATXMEGA32A4-CUR Datasheet - Page 102

• Manufacturer Part Number: ATXMEGA32A4-CUR
• Description: MCU AVR 32+4 FLASH 49VFBGA
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA32A4-CUR

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 12x12b, D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 49-VFBGA
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9. Reset System
9.1
9.2
8077H–AVR–12/09
Features
Overview
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The Reset System will issue a system reset and set the device to its initial state if a reset source
goes active. All IO registers will be set to their initial value, and the program counter is reset to
the Reset Vector location. The reset controller is asynchronous, hence no running clock is
required to reset the device.
XMEGA has seven different reset sources. If more than one reset source is active, the device
will be kept in reset until all reset sources have released their reset. After reset is released from
all reset sources, the default oscillator is started and calibrated before the internal reset is
released and the device starts running.
The reset system has a status register with individual flags for each reset source. The Status
register is cleared at Power-on Reset, hence this register will show which source(s) that has
issued a reset since the last power-on. A software reset feature makes it possible to issue a sys-
tem reset from the user software.
An overview of the reset system is shown in
Power-on reset source
Brown-out reset source
Software reset source
External reset source
Watchdog reset source
Program and Debug Interface reset source
Figure 9-1 on page
103.
XMEGA A
102