ATxmega64B3 Atmel Corporation, ATxmega64B3 Datasheet - Page 85

• Manufacturer Part Number: ATxmega64B3
• Manufacturer: Atmel Corporation

Specifications of ATxmega64B3

• 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: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Segment Lcd: 100
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• 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: 2
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

36.14.8
Table 36-28. External 32.768kHz crystal oscillator and TOSC characteristics
Note:
8074A–AVR–10/11
Symbol
ESR/R1
C
IN_TOSC
1. See
External 32.768kHz crystal oscillator and TOSC characteristics
Parameter
Recommended crystal equivalent
series resistance (ESR)
Input capacitance between TOSC pins
Recommended Safety factor
Long term Jitter (SIT)
Figure 36-4 on page 85
Figure 36-4. TOSC input capacitance
The input capacitance between the TOSC pins is C
when oscillating without external capacitors.
for definition
T
O
Crystal load capacitance 6.5pF
Crystal load capacitance 9.0pF
Normal mode
Low power mode
capacitance load matched to
crystal specification
S
C
1
Condition
32.768KHz crystal
Device internal
C
L1
External
C
L1
L2
+ C
L2
Min
3
in series as seen from the crystal
T
O
Typ
S
3.5
3.5
0
C
2
XMEGA B3
Max
60
35
Units
kΩ
pF
%
85