ATMEGA644A-AU Atmel, ATMEGA644A-AU Datasheet - Page 412

• 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

8272A–AVR–01/10
Figure 28-131.ATmega324A: BOD Threshold vs. Temperature (V
Figure 28-132.ATmega324A: Calibrated Bandgap Voltage vs. V
164A/164PA/324A/324PA/644A/644PA/1284/1284P
1.098
1.096
1.094
1.092
1.088
1.086
1.084
1.082
1.078
1.076
1.09
1.08
1.86
1.84
1.82
1.78
1.76
1.5
1.8
-40
2
-20
2.5
0
3
Temperature (°C)
Vcc (V)
20
3.5
40
4
4.5
60
CC
BOT
Falling Vcc
Rising Vcc
= 1.8V)
5
80
5.5
-40 °C
85 °C
25 °C
100
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