ATMEGA644-20PU Atmel, ATMEGA644-20PU Datasheet - Page 374

• Manufacturer Part Number: ATMEGA644-20PU
• Description: IC AVR MCU FLASH 64K 40DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644-20PU

• 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)
• Processor Series: ATMEGA64x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: 2-Wire/SPI/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRRZ541, ATAVRRAVEN, ATAVRRZRAVEN, ATAVRRZUSBSTICK, ATAVRRZ201
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Controller Family/series: AVR MEGA
• No. Of I/o's: 32
• Eeprom Memory Size: 2KB
• Ram Memory Size: 4KB
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Rohs Compliant: Yes
• Package: 40PDIP
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 20 MHz
• For Use With: ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

vi
ATmega644
27 Typical Characteristics ........................................................................ 324
28 Register Summary ............................................................................... 352
29 Instruction Set Summary .................................................................... 356
30 Ordering Information ........................................................................... 359
31 Packaging Information ........................................................................ 360
32 Errata ..................................................................................................... 363
33 Datasheet Revision History ................................................................ 364
26.4Maximum speed vs. V
26.52-wire Serial Interface Characteristics .................................................................319
26.6SPI Timing Characteristics ..................................................................................320
26.7ADC Characteristics ............................................................................................322
27.1Active Supply Current ..........................................................................................324
27.2Idle Supply Current ..............................................................................................327
27.3Supply Current of IO modules .............................................................................329
27.4Power-down Supply Current ...............................................................................330
27.5Power-save Supply Current ................................................................................331
27.6Standby Supply Current ......................................................................................332
27.7Pin Pull-up ...........................................................................................................336
27.8Pin Driver Strength ..............................................................................................339
27.9Pin Threshold and Hysteresis .............................................................................341
27.10BOD Threshold and Analog Comparator Offset ................................................344
27.11Internal Oscillator Speed ...................................................................................346
27.12Current Consumption of Peripheral Units ..........................................................348
30.1ATmega644 .........................................................................................................359
31.144A ......................................................................................................................360
31.240P6 ....................................................................................................................361
31.344M1 ...................................................................................................................362
32.1Rev. C .................................................................................................................363
32.2Rev. B ..................................................................................................................363
32.3Rev. A ..................................................................................................................363
33.1Rev. 2593L - 02/07 ..............................................................................................364
33.2Rev. 2593K - 01/07 .............................................................................................364
33.3Rev. 2593J - 09/06 ..............................................................................................364
33.4Rev. 2593I - 08/06 ...............................................................................................364
CC ............................................................................................................................. 317
2593N–AVR–07/10