ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 112
ATXMEGA256A3B-MH
Manufacturer Part Number
ATXMEGA256A3B-MH
Description
MCU AVR 256KB FLASH A3B 64-QFN
Manufacturer
Atmel
Series
AVR® XMEGAr
Specifications of ATXMEGA256A3B-MH
Core Processor
AVR
Core Size
8/16-Bit
Speed
32MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
49
Program Memory Size
256KB (128K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.6 V ~ 3.6 V
Data Converters
A/D 16x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-MLF®, 64-QFN
Processor Series
ATXMEGA256x
Core
AVR8
Data Bus Width
8 bit, 16 bit
Data Ram Size
16 KB
Interface Type
I2C, SPI, USART
Maximum Clock Frequency
32 MHz
Number Of Programmable I/os
49
Number Of Timers
7
Operating Supply Voltage
1.6 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 8 Channel
On-chip Dac
12 bit, 2 Channel
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
Other names
ATXMEGA256A3B-MU
ATXMEGA256A3B-MU
ATXMEGA256A3B-MU
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATXMEGA256A3B-MH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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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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