ATMEGA1284P-MUR Atmel, ATMEGA1284P-MUR Datasheet - Page 573

• Manufacturer Part Number: ATMEGA1284P-MUR
• Description: MCU AVR 128KB FLASH 20MHZ 44VQFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA1284P-MUR

• 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: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K 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: 44-VQFN Exposed Pad
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table of Contents
8272A–AVR–01/10
1
2
3
4
5
6
7
8
164A/164PA/324A/324PA/644A/644PA/1284/1284P
Features ..................................................................................................... 1
Pin Configurations ................................................................................... 2
Overview ................................................................................................... 5
Resources ................................................................................................. 9
About Code Examples ............................................................................. 9
Data Retention .......................................................................................... 9
AVR CPU Core ........................................................................................ 10
AVR Memories ........................................................................................ 19
System Clock and Clock Options ......................................................... 30
1.1Pinout - PDIP/TQFP/VQFN/QFN/MLF for
1.2Pinout - DRQFN for ATmega164A/164PA/324A/324PA ...........................................3
1.3Pinout - VFBGA for ATmega164A/164PA/324A/324PA ............................................4
2.1Block Diagram ...........................................................................................................5
2.2Comparison Between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA,
2.3Pin Descriptions ........................................................................................................7
6.1Overview .................................................................................................................10
6.2ALU – Arithmetic Logic Unit ....................................................................................11
6.3Status Register ........................................................................................................11
6.4General Purpose Register File ................................................................................13
6.5Stack Pointer ...........................................................................................................14
6.6Instruction Execution Timing ...................................................................................15
6.7Reset and Interrupt Handling ..................................................................................16
7.1Overview .................................................................................................................19
7.2In-System Reprogrammable Flash Program Memory .............................................19
7.3SRAM Data Memory ...............................................................................................20
7.4EEPROM Data Memory ..........................................................................................22
7.5I/O Memory ..............................................................................................................23
7.6Register Description ................................................................................................24
8.1Clock Systems and their Distribution .......................................................................30
8.2Clock Sources .........................................................................................................31
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 2
ATmega644A, ATmega644PA, ATmega1284 and ATmega1284P 6
i