ATmega329P Atmel Corporation, ATmega329P Datasheet - Page 335

• Manufacturer Part Number: ATmega329P
• Manufacturer: Atmel Corporation

Specifications of ATmega329P

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 20 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 17
• Usb Speed: No
• Usb Interface: No
• 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): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

28.4
28.4.1
Table 28-4.
Notes:
28.4.2
28.4.3
8021G–AVR–03/11
Factory
Calibration
User
Calibration
Clock Characteristics
1. Voltage range for ATmega329P/3290P
Calibrated Internal RC Oscillator Accuracy
External Clock Drive Waveforms
External Clock Drive
Calibration Accuracy of Internal RC Oscillator
Figure 28-4. External Clock Drive Waveforms
Table 28-5.
Symbol
1/t
t
t
t
t
t
Δ
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
7.3 - 8.1MHz
Frequency
8.0MHz
Parameter
Oscillator
Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period
from one clock
cycle to the next
V
External Clock Drive
IL1
V
IH1
1.8V - 5.5V
V
3V
1000
Min.
400
400
V
CC
0
CC
=1.8-5.5V
(1)
Max.
2.0
2.0
4
2
Min.
100
V
Temperature
40
40
-40°C - 85°C
0
CC
=2.7-5.5V
25°C
ATmega329P/3290P
Max.
1.6
1.6
10
2
Min.
V
50
20
20
0
CC
Calibration Accuracy
=4.5-5.5V
Max.
±10%
0.5
0.5
±1%
20
2
Units
MHz
ns
ns
ns
μs
μs
%
335