ATMEGA644P-20AU Atmel, ATMEGA644P-20AU Datasheet - Page 433

• Manufacturer Part Number: ATMEGA644P-20AU
• Description: IC MCU AVR 64K FLASH 44-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-20AU

• 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: 44-TQFP, 44-VQFP
• Processor Series: ATMEGA64x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: 2-Wire, SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 channel
• A/d Inputs: 8-Channel, 10-Bit
• Cpu Speed: 20 MIPS
• Eeprom Memory: 2K Bytes
• Input Output: 32
• Interface: 2-Wire/JTAG/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 64K Bytes
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2.7-5.5 V
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Total Internal Ram Size: 4KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Controller Family/series: AVR MEGA
• No. Of I/o's: 32
• Eeprom Memory Size: 2KB
• Ram Memory Size: 4KB
• Rohs Compliant: Yes
• For Use With: ATSTK600-TQFP44 - STK600 SOCKET/ADAPTER 44-TQFPATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1005 - ISP 4PORT FOR ATMEL AVR MCU JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8011O–AVR–07/10
10 External Interrupts ................................................................................. 67
11 I/O-Ports .................................................................................................. 72
12 8-bit Timer/Counter0 with PWM ............................................................ 93
13 16-bit Timer/Counter1 with PWM ........................................................ 111
14 8-bit Timer/Counter2 with PWM and Asynchronous Operation ...... 139
10.1 Overview ..............................................................................................................67
10.2 Register Description .............................................................................................67
11.1 Overview ..............................................................................................................72
11.2 Ports as General Digital I/O ..................................................................................73
11.3 Alternate Port Functions .......................................................................................78
11.4 Register Description .............................................................................................91
12.1 Features ...............................................................................................................93
12.2 Overview ..............................................................................................................93
12.3 Timer/Counter Clock Sources ..............................................................................94
12.4 Counter Unit .........................................................................................................94
12.5 Output Compare Unit ...........................................................................................95
12.6 Compare Match Output Unit .................................................................................97
12.7 Modes of Operation ..............................................................................................98
12.8 Timer/Counter Timing Diagrams ........................................................................102
12.9 Register Description ...........................................................................................104
13.1 Features .............................................................................................................111
13.2 Overview ............................................................................................................111
13.3 Accessing 16-bit Registers .................................................................................113
13.4 Timer/Counter Clock Sources ............................................................................116
13.5 Counter Unit .......................................................................................................117
13.6 Input Capture Unit ..............................................................................................118
13.7 Output Compare Units ........................................................................................120
13.8 Compare Match Output Unit ...............................................................................122
13.9 Modes of Operation ............................................................................................123
13.10 Timer/Counter Timing Diagrams ......................................................................130
13.11 Register Description .........................................................................................132
14.1 Features .............................................................................................................139
14.2 Overview ............................................................................................................139
14.3 Timer/Counter Clock Sources ............................................................................140
14.4 Counter Unit .......................................................................................................141
ATmega164P/324P/644P
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