ATMEGA644A-AU Atmel, ATMEGA644A-AU Datasheet - Page 363
ATMEGA644A-AU
Manufacturer Part Number
ATMEGA644A-AU
Description
IC MCU AVR 64K FLASH 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA644A-AU
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)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA644A-AU
Manufacturer:
Atmel
Quantity:
135
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8272A–AVR–01/10
Figure 28-39. ATmega164A: Calibrated 8 MHz RC Oscillator vs. Temperature
Figure 28-40. ATmega164A: Calibrated 8 MHz RC Oscillator vs. OSCCAL Value
164A/164PA/324A/324PA/644A/644PA/1284/1284P
8.3
8.2
8.1
7.9
7.8
7.7
16
14
12
10
8
8
6
4
2
0
-50
0
16
-40
32
-30
48
-20
64
-10
80
0
96 112 128 144 160 176 192 208 224 240 256
Temperature (°C)
10
OSCCAL (X1)
20
30
40
50
60
70
80
90
-40 °C
5.0 V
3.0 V
85 °C
25 °C
363
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