ATxmega128D4 Atmel Corporation, ATxmega128D4 Datasheet - Page 31

• Manufacturer Part Number: ATxmega128D4
• Manufacturer: Atmel Corporation

Specifications of ATxmega128D4

• Flash (kbytes): 128 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 Speed: No
• Usb Interface: No
• Spi: 4
• Twi (i2c): 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 200
• Analog Comparators: 2
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 8
• 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: 4
• Output Compare Channels: 14
• Input Capture Channels: 14
• Pwm Channels: 14
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

4.13.5
8210B–AVR–04/10
LOCKBITS - Non-Volatile Memory Lock Bit Register
Changing of the EESAVE fuse bit takes effect immediately after the write time-out elapses.
Hence, it is possible to update EESAVE and perform a chip erase according to the new setting
of EESAVE without leaving and re-entering programming mode
• Bit 2:0 - BODLEVEL[2:0] - Brown out detection voltage level
The BODLEVEL fuse bits sets the nominal BOD level value. During power-on the device is kept
in reset until the V
that the BOD level is set lower than the V
normal operation, refer to
Table 4-7.
Changing these fuse bits will have no effect until leaving programming mode.
• Bit 7:6 - BLBB[1:0]: Boot Lock Bit Boot Loader Section
These bits indicate the locking mode for the Boot Loader Section. Even though the BLBB bits
are writable, they can only be written to a stricter locking. Resetting the BLBB bits is only possi-
ble by executing a Chip Erase Command.
Bit
+0x07
Read/Write
Initial Value
BODLEVEL
111
110
101
100
011
010
001
000
BOD level nominal values, for actual values refer to the device datasheet.
R/W
7
1
CC
BLBB[1:0]
level has reached the programmed BOD level. Due to this always ensure
R/W
Section 9.4 ”Reset Sources” on page 104
6
1
R/W
5
1
BLBA[1:0]
CC
Normal BOD level value (V)
R/W
level, also if the BOD is not enabled and used during
4
1
R/W
3
1
BLBAT[1:0]
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
R/W
2
1
for details.
R/W
1
1
LB[1:0]
XMEGA D
R/W
0
1
LOCKBITS
31