ATmega64 Atmel Corporation, ATmega64 Datasheet - Page 40

• Manufacturer Part Number: ATmega64
• Manufacturer: Atmel Corporation

Specifications of ATmega64

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

2490Q–AVR–06/10
Figure 19. Crystal Oscillator Connections
The Oscillator can operate in three different modes, each optimized for a specific frequency
range. The operating mode is selected by the fuses CKSEL3..1 as shown in
Table 8. Crystal Oscillator Operating Modes
Note:
The CKSEL0 Fuse together with the SUT1..0 Fuses select the start-up times as shown in
9.
CKOPT
1
1
1
0
1. This option should not be used with crystals, only with ceramic resonators.
101, 110, 111
CKSEL3..1
101
110
111
(1)
Frequency Range
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
(MHz)
1.0 -
C2
C1
Recommended Range for Capacitors
C1 and C2 for Use with Crystals (pF)
XTAL2
XTAL1
GND
12 - 22
12 - 22
12 - 22
–
ATmega64(L)
Table
8.
Table
40