ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 30

• 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

4.16
4.16.1
4.16.2
4.16.3
8077H–AVR–12/09
Register Description – Fuses and Lockbits
FUSEBYTE0 - Non-Volatile Memory Fuse Byte 0 - JTAG User ID
FUSEBYTE1 - Non-Volatile Memory Fuse Byte1 - Watchdog Configuration
FUSEBYTE2 - Non-Volatile Memory Fuse Byte2 - Reset Configuration
• Bit 7 - JTAGUID[7:0]: JTAG USER ID
These fuses can be used to set the default JTAG USER ID for the device. During reset, the
JTAGUID fuse bits will be loaded into the MCU JTAG User ID Register.
• Bit 7:4 - WDWPER[3:0]: Watchdog Window Timeout Period
The WDWPER fuse bits are used to set initial value of the closed window for the Watchdog
Timer in Window Mode. During reset these fuse bits are automatically written to the WPER bits
Watchdog Window Mode Control Register, refer to
Control Register” on page 120
• BIT 3:0 - WDPER[3:0]: Watchdog Timeout Period
The WDPER fuse bits are used to set initial value of the Watchdog Timeout Period. During reset
these fuse bits are automatically written to the PER bits in the Watchdog Control Register, refer
to
• Bit 7 - Reserved
This fuse bit is reserved. For compatibility with future devices, always write this bit to one when
this register is written.
Bit
+0x02
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
Bit
+0x01
Read/Write
Initial Value
Section 11.7.1 ”CTRL – Watchdog Timer Control Register” on page 119
R/W
R/W
7
0
7
0
R/W
7
–
1
R/W
R/W
WDWPER[3:0]
6
0
6
0
BOOTRST
R/W
6
1
for details.
R/W
R/W
5
0
5
0
R/W
5
–
1
R/W
R/W
4
0
4
0
JTAGUID[7:0]
R/W
4
–
1
R/W
R/W
3
0
3
0
Section 11.7.2 ”WINCTRL – Window Mode
R/W
3
–
1
R/W
R/W
2
0
2
0
WDPER[3:0]
R/W
2
–
1
R/W
R/W
1
0
1
0
R/W
1
1
BODPD[1:0]
R/W
R/W
for details.
0
0
0
0
XMEGA A
R/W
0
1
FUSEBYTE0
FUSEBYTE1
FUSEBYTE2
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