ATxmega64A3U Atmel Corporation, ATxmega64A3U Datasheet - Page 36

• Manufacturer Part Number: ATxmega64A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega64A3U

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

4.17
4.17.1
4.17.2
8331A–AVR–07/11
Register Description – Production Signature Row
RCOSC2M – Internal 2MHz Oscillator Calibration Register
RCOSC2MA – Internal 2MHz Oscillator Calibration Register
• Bit 1:0 – LB[1:0]: Lock Bits
These lock bits control the the security level for the flash and EEPROM during external program-
ming. These bits are writable only through an external programming interface. Resetting the lock
bits is possible by executing a chip erase command.
Table 4-12.
• Bit 7:0 – RCOSC2M[7:0]: Internal 2MHz Oscillator Calibration Value
This byte contains the oscillator calibration value for the internal 2MHz oscillator. Calibration of
the oscillator is performed during production test of the device. During reset this value is auto-
matically loaded into calibration register B for the 2MHz DFLL. Refer to
Calibration Register B” on page 100
• Bit 7:0 – RCOSC2MA[7:0]: Internal 2MHz Oscillator Calibration Value
This byte contains the oscillator calibration value for the internal 2MHz oscillator. Calibration of
the oscillator is performed during production test of the device. During reset this value is auto-
matically loaded into calibration register A for the 2MHz DFLL. Refer to
Calibration Register A” on page 99
Bit
+0x00
Read/Write
Initial Value
Bit
+0x01
Read/Write
Initial Value
LB[1:0]
11
10
00
Boot lock bit for the boot section.
R
R
7
x
7
x
Group Configuration
R
R
6
x
6
x
NOLOCK3
RWLOCK
WLOCK
R
R
5
5
x
x
for more details.
for more details.
4
R
4
R
x
x
RCOSC2MA[7:0]
RCOSC2M[7:0]
Description
No lock – no memory locks enabled.
Write lock – programming of the flash and EEPROM is
disabled for the programming interface. Fuse bits are
locked for write from the programming interface.
Read and write lock – programming and
read/verification of the flash and EEPROM are disabled
for the programming interface. The lock bits and fuses
are locked for read and write from the programming
interface.
R
R
3
x
3
x
Atmel AVR XMEGA AU
R
R
2
2
x
x
R
R
1
1
x
x
0
R
0
R
x
x
”CALB – DFLL
”CALA – DFLL
RCOSC2MA
RCOSC2M
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