ATMEGA644A-AU Atmel, ATMEGA644A-AU Datasheet - Page 498

• 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 28-294.ATmega644PA: Minimum Reset Pulsewidth vs. V
164A/164PA/324A/324PA/644A/644PA/1284/1284P
1800
1600
1400
1200
1000
800
600
400
200
0
1.5
2
2.5
3
V
CC
3.5
(V)
4
4.5
CC
5
5.5
-40 °C
85 °C
25 °C
498