ATMEGA644P-20AQ Atmel, ATMEGA644P-20AQ Datasheet - Page 382
ATMEGA644P-20AQ
Manufacturer Part Number
ATMEGA644P-20AQ
Description
MCU AVR 64K FLASH 20MHZ 44-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA164P-20AU.pdf
(439 pages)
Specifications of ATMEGA644P-20AQ
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
32
Program Memory Size
64KB (32K x 16)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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8011O–AVR–07/10
Figure 26-84. Calibrated 8 MHz RC Oscillator vs. Temperature
Figure 26-85. Calibrated 8 MHz RC Oscillator vs. OSCCAL Value
8.2
8.1
7.9
7.8
CALIBRATED 8 MHz RC OSCILLATOR FREQUENCY vs. OSCCAL VALUE
16
14
12
10
8
8
6
4
2
0
-60
0
16
-40
32
48
-20
64
80
96
0
112
OSCCAL (X1)
Temperature (°C)
128
20
ATmega164P/324P/644P
144
160
40
176
192
60
208
224
80
5.0V
3.0V
240
100
256
-40°C
85°C
25°C
382
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