ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 33
ATxmega64A4U
Manufacturer Part Number
ATxmega64A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A4U
Flash (kbytes)
64 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
2
Uart
5
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
Dram Memory
No
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A4U-AU
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Quantity:
29 000
Company:
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Manufacturer:
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4.16.5
8331A–AVR–07/11
FUSEBYTE5 – Nonolatile Memory Fuse Byte 5
• Bit 7:6 – Reserved
These bits are reserved. For compatibility with future devices, always write these bits to one
when this register is written.
• Bit 5:4 – BODACT[1:0]: BOD Operation in Active Mode
These fuse bits set the BOD operation mode when the device is in active and idle mode. For
details on the BOD and BOD operation modes refer to
Table 4-7.
• Bit 3 – EESAVE: EEPROM is Preserved through the Chip Erase
A chip erase command will normally erase the flash, EEPROM and internal SRAM. If this fuse is
programmed, the EEPROM is not erased during chip erase. This is useful if EEPROM is used to
store data independent of software revision.
Table 4-8.
Changes to the EESAVE fuse bit take effect immediately after the write timeout elapses. Hence,
it is possible to update EESAVE and perform a chip erase according to the new setting of
EESAVE without leaving and reentering programming mode.
• Bit 2:0 – BODLEVEL[2:0]: Brownout Detection Voltage Level
These fuse bits sets the BOD voltage level. During poweron the device is kept in reset until the
V
is set lower than the V
”Reset System” on page 111
114.
Bit
+0x05
Read/Write
Initial Value
CC
BODACT[1:0]
EESAVE
level has reached the programmed BOD level. Due to this always ensure that the BOD level
00
01
10
11
0
1
BOD operation modes in active and idle modes.
EEPROM preserved through chip erase
R/W
7
–
1
Description
Reserved
BOD enabled in sampled mode
BOD enabled continuously
BOD disabled
Description
EEPROM is preserved during chip erase
EEPROM is erased during chip erase
CC
R/W
6
–
1
level, if the BOD is not enabled used during normal operation, refer to
for details. For BOD level nominal values, see
R
5
BODACT[1:0]
–
4
R
–
EESAVE
R/W
3
–
Atmel AVR XMEGA AU
”Brownout Detection” on page
R/W
2
–
BODLEVEL[2:0]
R/W
1
–
Table 9-2 on page
R/W
0
–
113.
FUSEBYTE5
33
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