ATMEGA644A-PU Atmel, ATMEGA644A-PU Datasheet - Page 445

• Manufacturer Part Number: ATMEGA644A-PU
• Description: IC MCU AVR 64K FLASH 40PDIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644A-PU

• 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: 40-DIP (0.600", 15.24mm)
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: JTAG, TWI, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

28.4.13
8272A–AVR–01/10
Current Consumption in Reset and Reset Pulsewidth
Figure 28-194.ATmega324PA: Reset Supply Current vs. Low Frequency (0.1 - 1.0 MHz)
Figure 28-195.ATmega324PA: Reset Supply Current vs. Frequency (1 - 20 MHz)
164A/164PA/324A/324PA/644A/644PA/1284/1284P
0.14
0.12
0.08
0.06
0.04
0.02
0.1
2.5
1.5
0.5
0
2
1
0
0
0
0.1
2
0.2
4
1.8 V
0.3
6
0.4
8
Frequency (MHz)
Frequency (MHz)
0.5
10
2.7 V
0.6
12
3.3 V
0.7
14
0.8
16
4.0 V
0.9
18
20
1
5.5 V
5.0 V
4.5 V
4.0 V
3.3 V
2.7 V
1.8 V
5.5 V
5.0 V
4.5 V
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