ATMEGA644-20MUR Atmel, ATMEGA644-20MUR Datasheet - Page 14

• Manufacturer Part Number: ATMEGA644-20MUR
• Description: MCU AVR 64K FLASH 20MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644-20MUR

• 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: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2593NS–AVR–07/10
OUT
PUSH
POP
MCU CONTROL INSTRUCTIONS
NOP
SLEEP
WDR
BREAK
Mnemonics
P, Rr
Rr
Rd
Operands
Out Port
Push Register on Stack
Pop Register from Stack
No Operation
Sleep
Watchdog Reset
Break
Description
P ← Rr
STACK ← Rr
Rd ← STACK
(see specific descr. for Sleep function)
(see specific descr. for WDR/timer)
For On-chip Debug Only
Operation
ATmega644
None
None
None
None
None
None
None
Flags
#Clocks
N/A
1
2
2
1
1
1
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