ATMEGA644P-20PQ Atmel, ATMEGA644P-20PQ Datasheet - Page 396

• Manufacturer Part Number: ATMEGA644P-20PQ
• Description: MCU AVR 64K FLASH 20MHZ 40-PDIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-20PQ

• 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: 40-DIP (0.600", 15.24mm)
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.3.7
8011O–AVR–07/10
Pin Pull-up
Figure 26-109.I/O Pin Pull-up Resistor Current vs. Input Voltage (V
Figure 26-110.I/O Pin Pull-up Resistor Current vs. Input Voltage (V
60
50
40
30
20
10
90
80
70
60
50
40
30
20
10
0
0
0
0
0.2
0.5
0.4
0.6
1
0.8
V
CC
V
OP
OP
1.5
1
(V)
(V)
ATmega164P/324P/644P
1.2
2
1.4
1.6
CC
CC
2.5
= 1.8V).
= 2.7V).
1.8
2
3
-40°C
-40°C
25°C
85°C
25°C
85°C
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