ATmega64 Atmel Corporation, ATmega64 Datasheet - Page 327

• 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

External Clock
Drive Waveforms
External Clock
Drive
2490Q–AVR–06/10
Figure 155. External Clock Drive Waveforms
Table 131. External Clock Drive
Note:
Table 132. External RC Oscillator, Typical Frequencies
Notes:
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
1. Refer to
1. R should be in the range 3 kΩ - 100 kΩ, and C should be at least 20 pF. The C values given in
2. The frequency will vary with package type and board layout.
the table includes pin capacitance. This will vary with package type.
R [kΩ]
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
31.5
6.5
V
IL1
(1)
V
“External Clock” on page 44
IH1
(1)
V
CC
Min
125
50
50
0
= 2.7V to
C [pF]
for details.
20
20
Max
1.6
1.6
5.5
8
2
V
V
62.5
Min
CC
25
25
0
= 4.5V to
ATmega64(L)
Max
650 kHz
2.0 MHz
0.5
0.5
16
5.5
2
f
(2)
V
Units
MHz
ns
µs
%
327