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Features
* High Performance, Low Power AVR(R) 8-Bit Microcontroller * Advanced RISC Architecture
- 135 Powerful Instructions - Most Single Clock Cycle Execution - 32 x 8 General Purpose Working Registers - Fully Static Operation - Up to 16 MIPS Throughput at 16 MHz - On-Chip 2-cycle Multiplier Non-volatile Program and Data Memories - 64K/128K/256K Bytes of In-System Self-Programmable Flash Endurance: 10,000 Write/Erase Cycles - Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation - 4K Bytes EEPROM Endurance: 100,000 Write/Erase Cycles - 8K Bytes Internal SRAM - Up to 64K Bytes Optional External Memory Space - Programming Lock for Software Security JTAG (IEEE std. 1149.1 compliant) Interface - Boundary-scan Capabilities According to the JTAG Standard - Extensive On-chip Debug Support - Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface Peripheral Features - Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode - Four 16-bit Timer/Counter with Separate Prescaler, Compare- and Capture Mode - Real Time Counter with Separate Oscillator - Four 8-bit PWM Channels - Six/Twelve PWM Channels with Programmable Resolution from 2 to 16 Bits (ATmega1281/2561, ATmega640/1280/2560) - Output Compare Modulator - 8/16-channel, 10-bit ADC - Two/Four Programmable Serial USART (ATmega1281/2561,ATmega640/1280/2560) - Master/Slave SPI Serial Interface - Byte Oriented 2-wire Serial Interface - Programmable Watchdog Timer with Separate On-chip Oscillator - On-chip Analog Comparator - Interrupt and Wake-up on Pin Change Special Microcontroller Features - Power-on Reset and Programmable Brown-out Detection - Internal Calibrated Oscillator - External and Internal Interrupt Sources - Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby I/O and Packages - 51/86 Programmable I/O Lines (ATmega1281/2561, ATmega640/1280/2560) - 64-lead (ATmega1281/2561) - 100-lead (ATmega640/1280/2560) - 100-lead TQFP (64-lead TQFP Option) Temperature Range: - -40C to 85C Industrial Speed Grade: - ATmega1281/2561V/ATmega640/1280/2560V: 0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V - ATmega640/1280/1281/2560/2561: 0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V
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8-bit Microcontroller with 256K Bytes In-System Programmable Flash ATmega1281/25 61/V ATmega640/128 0/2560/V Advance Information Summary
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Note: This is a summary document. A complete document is available on our Web site at www.atmel.com.
Pin Configurations
Figure 1. Pinout ATmega640/1280/2560
PK6 (ADC14/PCINT22) PK7 (ADC15/PCINT23) PK3 (ADC11/PCINT19) PK2 (ADC10/PCINT18) PK4 (ADC12/PCINT20) PK5 (ADC13/PCINT21) PK0 (ADC8/PCINT16) PF5 (ADC5/TMS) PF6 (ADC6/TDO) PF4 (ADC4/TCK) PF7 (ADC7/TDI) PK1 (ADC9/PCINT17)
PF1 (ADC1)
PF2 (ADC2)
PF0 (ADC0)
PF3 (ADC3)
PA0 (AD0)
PA1 (AD1)
77
100 99 (OC0B) PG5 (RXD0/PCINT8) PE0 (TXD0) PE1 (XCK0/AIN0) PE2 (OC3A/AIN1) PE3 (OC3B/INT4) PE4 (OC3C/INT5) PE5 (T3/INT6) PE6 (CLKO/ICP3/INT7) PE7 VCC GND (RXD2) PH0 (TXD2) PH1 (XCK2) PH2 (OC4A) PH3 (OC4B) PH4 (OC4C) PH5 (OC2B) PH6 (SS/PCINT0) PB0 (SCK/PCINT1) PB1 (MOSI/PCINT2) PB2 (MISO/PCINT3) PB3 (OC2A/PCINT4) PB4 (OC1A/PCINT5) PB5 (OC1B/PCINT6) PB6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
PA2 (AD2)
76 75 74 PA3 (AD3) PA4 (AD4) PA5 (AD5) PA6 (AD6) PA7 (AD7) PG2 (ALE) PJ6 (PCINT15) PJ5 (PCINT14) PJ4 (PCINT13) PJ3 (PCINT12) PJ2 (XCK3/PCINT11) PJ1 (TXD3/PCINT10) PJ0 (RXD3/PCINT9) GND VCC PC7 (A15) PC6 (A14) PC5 (A13) PC4 (A12) PC3 (A11) PC2 (A10) PC1 (A9) PC0 (A8) PG1 (RD) PG0 (WR) 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50
AVCC
AREF
GND
GND
VCC
46
INDEX CORNER
ATmega640/1280/2560
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
PJ7
47
48
49
(OC0A/OC1C/PCINT7) PB7
VCC
GND
(ICP4) PL0
(RXD1/INT2) PD2
(SCL/INT0) PD0
(XCK1) PD5
(T1) PD6
(T4) PH7
(TXD1/INT3) PD3
(OC5A) PL3
(OC5B) PL4
(OC5C) PL5
(TOSC2) PG3
(TOSC1) PG4
2
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
(SDA/INT1) PD1
(ICP1) PD4
(ICP5) PL1
(T0) PD7
(T5) PL2
XTAL2
RESET
XTAL1
PL7
PL6
ATmega640/1280/1281/2560/2561
Figure 2. Pinout ATmega1281/2561
PF6 (ADC6/TDO) PF4 (ADC4/TCK) PF5 (ADC5/TMS) PF7 (ADC7/TDI) PF0 (ADC0) PF1 (ADC1) PF2 (ADC2) PF3 (ADC3)
PA0 (AD0)
PA1 (AD1) 50
64
63
62
61
60
59
58
57
56
55
54
53
52
51
(OC0B) PG5 (RXD0/PCINT8/PDI) PE0 (TXD0/PDO) PE1 (XCK0/AIN0) PE2 (OC3A/AIN1) PE3 (OC3B/INT4) PE4 (OC3C/INT5) PE5 (T3/INT6) PE6 (ICP3/CLKO/INT7) PE7 (SS/PCINT0) PB0 (SCK/ PCINT1) PB1 (MOSI/ PCINT2) PB2 (MISO/ PCINT3) PB3 (OC2A/ PCINT4) PB4 (OC1A/PCINT5) PB5 (OC1B/PCINT6) PB6
1 2 3 4 5 6 7 8
INDEX CORNER
49
PA2 (AD2)
AVCC
GND
AREF
GND
VCC
48 47 46 45 44 43 42
PA3 (AD3) PA4 (AD4) PA5 (AD5) PA6 (AD6) PA7 (AD7) PG2 (ALE) PC7 (A15) PC6 (A14) PC5 (A13) PC4 (A12) PC3 (A11) PC2 (A10) PC1 (A9) PC0 (A8) PG1 (RD) PG0 (WR)
ATmega1281/2561
9 10 11 12 13 14 15 16
41 40 39 38 37 36 35 34 33
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 (T1) PD6
(RXD1/INT2) PD2
(SCL/INT0) PD0
(TXD1/INT3) PD3
(OC0A/OC1C/PCINT7) PB7
(XCK1) PD5
(ICP1) PD4
VCC
Note:
The large center pad underneath the QFN/MLF package is made of metal and internally connected to GND. It should be soldered or glued to the board to ensure good mechanical stability. If the center pad is left unconnected, the package might loosen from the board.
Disclaimer
Typical values contained in this datasheet are based on simulations and characterization of other AVR microcontrollers manufactured on the same process technology. Min and Max values will be available after the device is characterized.
(SDA/INT1) PD1
(TOSC2) PG3
(TOSC1) PG4
(T0) PD7
GND
XTAL2
RESET
XTAL1
32
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2549AS-AVR-03/05
Overview
The ATmega640/1280/1281/2560/2561 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega640/1280/1281/2560/2561 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
Block Diagram
Figure 3. Block Diagram
PF7..0
VCC
PK7..0
PJ7..0
PE7..0
RESET
Power Supervision POR / BOD & RESET
PORT F (8)
PORT K (8)
PORT J (8)
PORT E (8)
GND
Watchdog Timer
Watchdog Oscillator
JTAG
A/D Converter
Analog Comparator
USART 0
XTAL1
Oscillator Circuits / Clock Generation
EEPROM
Internal Bandgap reference
16bit T/C 3
XTAL2
CPU
16bit T/C 5
USART 3
PA7..0
PORT A (8)
16bit T/C 4 USART 1
PG5..0
PORT G (6)
XRAM
FLASH
SRAM
16bit T/C 1
PC7..0
PORT C (8)
TWI
SPI
8bit T/C 0
8bit T/C 2
USART 2
NOTE: Shaded parts only appear in the 100 pin version. The ADC, T/C4 and T/C5 only have full functionality in the 100 pin version.
PORT D (8) PORT B (8) PORT H (8) PORT L (8)
PD7..0
PB7..0
PH7..0
PL7..0
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ATmega640/1280/1281/2560/2561
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ATmega640/1280/1281/2560/2561
The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. The ATmega640/1280/1281/2560/2561 provides the following features: 64K/128K/256K bytes of In-System Programmable Flash with Read-While-Write capabilities, 4K bytes EEPROM, 8K bytes SRAM, 54/86 general purpose I/O lines, 32 general purpose working registers, Real Time Counter (RTC), six flexible Timer/Counters with compare modes and PWM, 4 USARTs, a byte oriented 2-wire Serial Interface, a 16-channel, 10bit ADC with optional differential input stage with programmable gain, programmable Watchdog Timer with Internal Oscillator, an SPI serial port, IEEE std. 1149.1 compliant JTAG test interface, also used for accessing the On-chip Debug system and programming and six software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset. In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except Asynchronous Timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. In Extended Standby mode, both the main Oscillator and the Asynchronous Timer continue to run. The device is manufactured using Atmel's high-density nonvolatile memory technology. The On-chip ISP Flash allows the program memory to be reprogrammed in-system through an SPI serial interface, by a conventional nonvolatile memory programmer, or by an On-chip Boot program running on the AVR core. The boot program can use any interface to download the application program in the application Flash memory. Software in the Boot Flash section will continue to run while the Application Flash section is updated, providing true Read-While-Write operation. By combining an 8-bit RISC CPU with In-System Self-Program mable Flash on a monolithic ch ip, the Atmel ATmega640/1280/1281/2560/2561 is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control applications. The ATmega640/1280/1281/2560/2561 AVR is supported with a full suite of program and system development tools including: C compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits.
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Comparison Between ATmega1281/2561 and ATmega640/1280/2560
Each device in the ATmega640/1280/1281/2560/2561 family differs only in memory size and number of pins. Table 1 summarizes the different configurations for the six devices. Table 1. Configuration Summary
Device ATmega640 ATMEGA1280 ATmega1281 ATmega2560 ATmega2561 Flash 64KB 128KB 128KB 256KB 256KB EEPROM 4KB 4KB 4KB 4KB 4KB RAM 8KB 8KB 8KB 8KB 8KB General Purpose I/O pins 86 86 54 86 54 16 bits resolution PWM channels 12 12 6 12 6 Serial USARTs 4 4 2 4 2 ADC Channels 16 16 8 16 8
Pin Descriptions
VCC GND Port A (PA7..PA0) Digital supply voltage. Ground. Port A is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port A output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port A pins that are externally pulled low will source current if the pull-up resistors are activated. The Port A pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port A also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 88. Port B (PB7..PB0) Port B is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port B pins that are externally pulled low will source current if the pull-up resistors are activated. The Port B pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port B has better driving capabilities than the other ports. Port B also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 89. Port C (PC7..PC0) Port C is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port C output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port C pins that are externally pulled low will source current if the pull-up resistors are activated. The Port C pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port C also serves the functions of special ATmega640/1280/1281/2560/2561 as listed on page 92. Port D (PD7..PD0) features of the
Port D is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port D output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port D pins that are externally pulled low will source
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ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
current if the pull-up resistors are activated. The Port D pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port D also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 94. Port E (PE7..PE0) Port E is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port E output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port E pins that are externally pulled low will source current if the pull-up resistors are activated. The Port E pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port E also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 96. Port F (PF7..PF0) Port F serves as analog inputs to the A/D Converter. Port F also serves as an 8-bit bi-directional I/O port, if the A/D Converter is not used. Port pins can provide internal pull-up resistors (selected for each bit). The Port F output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port F pins that are externally pulled low will source current if the pull-up resistors are activated. The Port F pins are tri-stated when a reset condition becomes active, even if the clock is not running. If the JTAG interface is enabled, the pull-up resistors on pins PF7(TDI), PF5(TMS), and PF4(TCK) will be activated even if a reset occurs. Port F also serves the functions of the JTAG interface. Port G (PG5..PG0) Port G is a 6-bit I/O port with internal pull-up resistors (selected for each bit). The Port G output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port G pins that are externally pulled low will source current if the pull-up resistors are activated. The Port G pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port G also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 102. Port H (PH7..PH0) Port H is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port H output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port H pins that are externally pulled low will source current if the pull-up resistors are activated. The Port H pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port H also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 104. Port J (PJ7..PJ0) Port J is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port J output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port J pins that are externally pulled low will source current if the pull-up resistors are activated. The Port J pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port J also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 106. Port K (PK7..PK0) Port K serves as analog inputs to the A/D Converter.
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2549AS-AVR-03/05
Port K is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port K output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port K pins that are externally pulled low will source current if the pull-up resistors are activated. The Port K pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port K also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 108. Port L (PL7..PL0) Port L is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port L output buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port L pins that are externally pulled low will source current if the pull-up resistors are activated. The Port L pins are tri-stated when a reset condition becomes active, even if the clock is not running. Port L also serves the functions of various special features of the ATmega640/1280/1281/2560/2561 as listed on page 110. RESET Reset input. A low level on this pin for longer than the minimum pulse length will generate a reset, even if the clock is not running. The minimum pulse length is given in Table 23 on page 58. Shorter pulses are not guaranteed to generate a reset. Input to the inverting Oscillator amplifier and input to the internal clock operating circuit. Output from the inverting Oscillator amplifier. AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally connected to VCC, even if the ADC is not used. If the ADC is used, it should be connected to VCC through a low-pass filter. This is the analog reference pin for the A/D Converter.
XTAL1 XTAL2 AVCC
AREF
8
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Register Summary
Address
(0x1FF) ... (0x13F) (0x13E) (0x13D) (0x13C) (0x13B) (0x13A) (0x139) (0x138) (0x137) (0x136) (0x135) (0x134) (0x133) (0x132) (0x131) (0x130) (0x12F) (0x12E) (0x12D) (0x12C) (0x12B) (0x12A) (0x129) (0x128) (0x127) (0x126) (0x125) (0x124) (0x123) (0x122) (0x121) (0x120) (0x11F) (0x11E) (0x11D) (0x11C) (0x11B) (0x11A) (0x119) (0x118) (0x117) (0x116) (0x115) (0x114) (0x113) (0x112) (0x111) (0x110) (0x10F) (0x10E) (0x10D) (0x10C) (0x10B) (0x10A) (0x109) (0x108) (0x107) (0x106) (0x105) (0x104) (0x103) (0x102)
Name
Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved UDR3 UBRR3H UBRR3L Reserved UCSR3C UCSR3B UCSR3A Reserved Reserved OCR5CH OCR5CL OCR5BH OCR5BL OCR5AH OCR5AL ICR5H ICR5L TCNT5H TCNT5L Reserved TCCR5C TCCR5B TCCR5A Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved PORTL DDRL PINL PORTK DDRK PINK PORTJ DDRJ PINJ PORTH
Bit 7
-
Bit 6
-
Bit 5
-
Bit 4
-
Bit 3
-
Bit 2
-
Bit 1
-
Bit 0
-
Page
USART3 I/O Data Register UMSEL31 RXCIE3 RXC3 UMSEL30 TXCIE3 TXC3 UPM31 UDRIE3 UDRE3 UPM30 RXEN3 FE3 USBS3 TXEN3 DOR3 USART3 Baud Rate Register High Byte UCSZ31 UCSZ32 UPE3 UCSZ30 RXB83 U2X3 UCPOL3 TXB83 MPCM3 USART3 Baud Rate Register Low Byte
Timer/Counter5 - Output Compare Register C High Byte Timer/Counter5 - Output Compare Register C Low Byte Timer/Counter5 - Output Compare Register B High Byte Timer/Counter5 - Output Compare Register B Low Byte Timer/Counter5 - Output Compare Register A High Byte Timer/Counter5 - Output Compare Register A Low Byte Timer/Counter5 - Input Capture Register High Byte Timer/Counter5 - Input Capture Register Low Byte Timer/Counter5 - Counter Register High Byte Timer/Counter5 - Counter Register Low Byte FOC5A ICNC5 COM5A1 PORTL7 DDL7 PINL7 PORTK7 DDK7 PINK7 PORTJ7 DDJ7 PINJ7 PORTH7 FOC5B ICES5 COM5A0 PORTL6 DDL6 PINL6 PORTK6 DDK6 PINK6 PORTJ6 DDJ6 PINJ6 PORTH6 FOC5C COM5B1 PORTL5 DDL5 PINL5 PORTK5 DDK5 PINK5 PORTJ5 DDJ5 PINJ5 PORTH5 WGM53 COM5B0 PORTL4 DDL4 PINL4 PORTK4 DDK4 PINK4 PORTJ4 DDJ4 PINJ4 PORTH4 WGM52 COM5C1 PORTL3 DDL3 PINL3 PORTK3 DDK3 PINK3 PORTJ3 DDJ3 PINJ3 PORTH3 CS52 COM5C0 PORTL2 DDL2 PINL2 PORTK2 DDK2 PINK2 PORTJ2 DDJ2 PINJ2 PORTH2 CS51 WGM51 PORTL1 DDL1 PINL1 PORTK1 DDK1 PINK1 PORTJ1 DDJ1 PINJ1 PORTH1 CS50 WGM50 PORTL0 DDL0 PINL0 PORTK0 DDK0 PINK0 PORTJ0 DDJ0 PINJ0 PORTH0
9
2549AS-AVR-03/05
Address
(0x101) (0x100) (0xFF) (0xFE) (0xFD) (0xFC) (0xFB) (0xFA) (0xF9) (0xF8) (0xF7) (0xF6) (0xF5) (0xF4) (0xF3) (0xF2) (0xF1) (0xF0) (0xEF) (0xEE) (0xED) (0xEC) (0xEB) (0xEA) (0xE9) (0xE8) (0xE7) (0xE6) (0xE5) (0xE4) (0xE3) (0xE2) (0xE1) (0xE0) (0xDF) (0xDE) (0xDD) (0xDC) (0xDB) (0xDA) (0xD9) (0xD8) (0xD7) (0xD6) (0xD5) (0xD4) (0xD3) (0xD2) (0xD1) (0xD0) (0xCF) (0xCE) (0xCD) (0xCC) (0xCB) (0xCA) (0xC9) (0xC8) (0xC7) (0xC6) (0xC5) (0xC4) (0xC3) (0xC2) (0xC1) (0xC0)
Name
DDRH PINH Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved Reserved UDR2 UBRR2H UBRR2L Reserved UCSR2C UCSR2B UCSR2A Reserved UDR1 UBRR1H UBRR1L Reserved UCSR1C UCSR1B UCSR1A Reserved UDR0 UBRR0H UBRR0L Reserved UCSR0C UCSR0B UCSR0A
Bit 7
DDH7 PINH7 UMSEL21 RXCIE2 RXC2 UMSEL11 RXCIE1 RXC1 UMSEL01 RXCIE0 RXC0
Bit 6
DDH6 PINH6 UMSEL20 TXCIE2 TXC2 UMSEL10 TXCIE1 TXC1 UMSEL00 TXCIE0 TXC0
Bit 5
DDH5 PINH5 UPM21 UDRIE2 UDRE2 UPM11 UDRIE1 UDRE1 UPM01 UDRIE0 UDRE0
Bit 4
DDH4 PINH4 UPM20 RXEN2 FE2 UPM10 RXEN1 FE1 UPM00 RXEN0 FE0
Bit 3
DDH3 PINH3 -
Bit 2
DDH2 PINH2 -
Bit 1
DDH1 PINH1 -
Bit 0
DDH0 PINH0 -
Page
-
-
USART2 I/O Data Register USART2 Baud Rate Register High Byte USBS2 TXEN2 DOR2 UCSZ21 UCSZ22 UPE2 UCSZ20 RXB82 U2X2 UCPOL2 TXB82 MPCM2 USART2 Baud Rate Register Low Byte
USART1 I/O Data Register USART1 Baud Rate Register High Byte USBS1 TXEN1 DOR1 UCSZ11 UCSZ12 UPE1 UCSZ10 RXB81 U2X1 UCPOL1 TXB81 MPCM1 USART1 Baud Rate Register Low Byte
USART0 I/O Data Register USART0 Baud Rate Register High Byte USBS0 TXEN0 DOR0 UCSZ01 UCSZ02 UPE0 UCSZ00 RXB80 U2X0 UCPOL0 TXB80 MPCM0 USART0 Baud Rate Register Low Byte
10
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Address
(0xBF) (0xBE) (0xBD) (0xBC) (0xBB) (0xBA) (0xB9) (0xB8) (0xB7) (0xB6) (0xB5) (0xB4) (0xB3) (0xB2) (0xB1) (0xB0) (0xAF) (0xAE) (0xAD) (0xAC) (0xAB) (0xAA) (0xA9) (0xA8) (0xA7) (0xA6) (0xA5) (0xA4) (0xA3) (0xA2) (0xA1) (0xA0) (0x9F) (0x9E) (0x9D) (0x9C) (0x9B) (0x9A) (0x99) (0x98) (0x97) (0x96) (0x95) (0x94) (0x93) (0x92) (0x91) (0x90) (0x8F) (0x8E) (0x8D) (0x8C) (0x8B) (0x8A) (0x89) (0x88) (0x87) (0x86) (0x85) (0x84) (0x83) (0x82) (0x81) (0x80) (0x7F) (0x7E)
Name
Reserved Reserved TWAMR TWCR TWDR TWAR TWSR TWBR Reserved ASSR Reserved OCR2B OCR2A TCNT2 TCCR2B TCCR2A Reserved Reserved OCR4CH OCR4CL OCR4BH OCR4BL OCR4AH OCR4AL ICR4H ICR4L TCNT4H TCNT4L Reserved TCCR4C TCCR4B TCCR4A Reserved Reserved OCR3CH OCR3CL OCR3BH OCR3BL OCR3AH OCR3AL ICR3H ICR3L TCNT3H TCNT3L Reserved TCCR3C TCCR3B TCCR3A Reserved Reserved OCR1CH OCR1CL OCR1BH OCR1BL OCR1AH OCR1AL ICR1H ICR1L TCNT1H TCNT1L Reserved TCCR1C TCCR1B TCCR1A DIDR1 DIDR0
Bit 7
TWAM6 TWINT TWA6 TWS7 -
Bit 6
TWAM5 TWEA TWA5 TWS6 EXCLK -
Bit 5
TWAM4 TWSTA TWA4 TWS5 AS2 -
Bit 4
TWAM3 TWSTO TWA3 TWS4 TCN2UB -
Bit 3
TWAM2 TWWC TWA2 TWS3 OCR2AUB -
Bit 2
TWAM1 TWEN TWA1 OCR2BUB -
Bit 1
TWAM0 TWA0 TWPS1 TCR2AUB -
Bit 0
TWIE TWGCE TWPS0 TCR2BUB -
Page
2-wire Serial Interface Data Register
2-wire Serial Interface Bit Rate Register
Timer/Counter2 Output Compare Register B Timer/Counter2 Output Compare Register A Timer/Counter2 (8 Bit) FOC2A COM2A1 FOC2B COM2A0 COM2B1 COM2B0 WGM22 CS22 CS21 WGM21 CS20 WGM20 -
Timer/Counter4 - Output Compare Register C High Byte Timer/Counter4 - Output Compare Register C Low Byte Timer/Counter4 - Output Compare Register B High Byte Timer/Counter4 - Output Compare Register B Low Byte Timer/Counter4 - Output Compare Register A High Byte Timer/Counter4 - Output Compare Register A Low Byte Timer/Counter4 - Input Capture Register High Byte Timer/Counter4 - Input Capture Register Low Byte Timer/Counter4 - Counter Register High Byte Timer/Counter4 - Counter Register Low Byte FOC4A ICNC4 COM4A1 FOC4B ICES4 COM4A0 FOC4C COM4B1 WGM43 COM4B0 WGM42 COM4C1 CS42 COM4C0 CS41 WGM41 CS40 WGM40 -
Timer/Counter3 - Output Compare Register C High Byte Timer/Counter3 - Output Compare Register C Low Byte Timer/Counter3 - Output Compare Register B High Byte Timer/Counter3 - Output Compare Register B Low Byte Timer/Counter3 - Output Compare Register A High Byte Timer/Counter3 - Output Compare Register A Low Byte Timer/Counter3 - Input Capture Register High Byte Timer/Counter3 - Input Capture Register Low Byte Timer/Counter3 - Counter Register High Byte Timer/Counter3 - Counter Register Low Byte FOC3A ICNC3 COM3A1 FOC3B ICES3 COM3A0 FOC3C COM3B1 WGM33 COM3B0 WGM32 COM3C1 CS32 COM3C0 CS31 WGM31 CS30 WGM30 -
Timer/Counter1 - Output Compare Register C High Byte Timer/Counter1 - Output Compare Register C Low Byte Timer/Counter1 - Output Compare Register B High Byte Timer/Counter1 - Output Compare Register B Low Byte Timer/Counter1 - Output Compare Register A High Byte Timer/Counter1 - Output Compare Register A Low Byte Timer/Counter1 - Input Capture Register High Byte Timer/Counter1 - Input Capture Register Low Byte Timer/Counter1 - Counter Register High Byte Timer/Counter1 - Counter Register Low Byte FOC1A ICNC1 COM1A1 ADC7D FOC1B ICES1 COM1A0 ADC6D FOC1C COM1B1 ADC5D WGM13 COM1B0 ADC4D WGM12 COM1C1 ADC3D CS12 COM1C0 ADC2D CS11 WGM11 AIN1D ADC1D CS10 WGM10 AIN0D ADC0D
11
2549AS-AVR-03/05
Address
(0x7D) (0x7C) (0x7B) (0x7A) (0x79) (0x78) (0x77) (0x76) (0x75) (0x74) (0x73) (0x72) (0x71) (0x70) (0x6F) (0x6E) (0x6D) (0x6C) (0x6B) (0x6A) (0x69) (0x68) (0x67) (0x66) (0x65) (0x64) (0x63) (0x62) (0x61) (0x60) 0x3F (0x5F) 0x3E (0x5E) 0x3D (0x5D) 0x3C (0x5C) 0x3B (0x5B) 0x3A (0x5A) 0x39 (0x59) 0x38 (0x58) 0x37 (0x57) 0x36 (0x56) 0x35 (0x55) 0x34 (0x54) 0x33 (0x53) 0x32 (0x52) 0x31 (0x51) 0x30 (0x50) 0x2F (0x4F) 0x2E (0x4E) 0x2D (0x4D) 0x2C (0x4C) 0x2B (0x4B) 0x2A (0x4A) 0x29 (0x49) 0x28 (0x48) 0x27 (0x47) 0x26 (0x46) 0x25 (0x45) 0x24 (0x44) 0x23 (0x43) 0x22 (0x42) 0x21 (0x41) 0x20 (0x40) 0x1F (0x3F) 0x1E (0x3E) 0x1D (0x3D)
Name
DIDR2 ADMUX ADCSRB ADCSRA ADCH ADCL Reserved Reserved XMCRB XMCRA TIMSK5 TIMSK4 TIMSK3 TIMSK2 TIMSK1 TIMSK0 PCMSK2 PCMSK1 PCMSK0 EICRB EICRA PCICR Reserved OSCCAL PRR1 PRR0 Reserved Reserved CLKPR WDTCSR SREG SPH SPL EIND RAMPZ Reserved Reserved Reserved SPMCSR Reserved MCUCR MCUSR SMCR Reserved OCDR/ MONDR ACSR Reserved SPDR SPSR SPCR GPIOR2 GPIOR1 Reserved OCR0B OCR0A TCNT0 TCCR0B TCCR0A GTCCR EEARH EEARL EEDR EECR GPIOR0 EIMSK
Bit 7
ADC15D REFS1 ADEN
Bit 6
ADC14D REFS0 ACME ADSC
Bit 5
ADC13D ADLAR ADATE
Bit 4
ADC12D MUX4 ADIF
Bit 3
ADC11D MUX3 MUX5 ADIE
Bit 2
ADC10D MUX2 ADTS2 ADPS2
Bit 1
ADC9D MUX1 ADTS1 ADPS1
Bit 0
ADC8D MUX0 ADTS0 ADPS0
Page
ADC Data Register High byte ADC Data Register Low byte XMBK SRE PCINT23 PCINT15 PCINT7 ISC71 ISC31 PRTWI CLKPCE WDIF I SP15 SP7 SPMIE JTD OCDR7 ACD SPIF SPIE SRL2 PCINT22 PCINT14 PCINT6 ISC70 ISC30 PRTIM2 WDIE T SP14 SP6 RWWSB OCDR6 ACBG WCOL SPE SRL1 ICIE5 ICIE4 ICIE3 ICIE1 PCINT21 PCINT13 PCINT5 ISC61 ISC21 PRTIM5 PRTIM0 WDP3 H SP13 SP5 SIGRD OCDR5 ACO DORD SRL0 PCINT20 PCINT12 PCINT4 ISC60 ISC20 PRTIM4 WDCE S SP12 SP4 RWWSRE PUD JTRF OCDR4 ACI MSTR SRW11 OCIE5C OCIE4C OCIE3C OCIE1C PCINT19 PCINT11 PCINT3 ISC51 ISC11 PRTIM3 PRTIM1 CLKPS3 WDE V SP11 SP3 BLBSET WDRF SM2 OCDR3 ACIE SPI Data Register CPOL CPHA SPR1 SPI2X SPR0 XMM2 SRW10 OCIE5B OCIE4B OCIE3B OCIE2B OCIE1B OCIE0B PCINT18 PCINT10 PCINT2 ISC50 ISC10 PCIE2 PRUSART3 PRSPI CLKPS2 WDP2 N SP10 SP2 PGWRT BORF SM1 OCDR2 ACIC XMM1 SRW01 OCIE5A OCIE4A OCIE3A OCIE2A OCIE1A OCIE0A PCINT17 PCINT9 PCINT1 ISC41 ISC01 PCIE1 PRUSART2 PRUSART0 CLKPS1 WDP1 Z SP9 SP1 RAMPZ1 PGERS IVSEL EXTRF SM0 OCDR1 ACIS1 XMM0 SRW00 TOIE5 TOIE4 TOIE3 TOIE2 TOIE1 TOIE0 PCINT16 PCINT8 PCINT0 ISC40 ISC00 PCIE0 PRUSART1 PRADC CLKPS0 WDP0 C SP8 SP0 EIND0 RAMPZ0 SPMEN IVCE PORF SE OCDR0 ACIS0 -
Oscillator Calibration Register
Monitor Data Register
General Purpose I/O Register 2 General Purpose I/O Register 1 Timer/Counter0 Output Compare Register B Timer/Counter0 Output Compare Register A Timer/Counter0 (8 Bit) FOC0A COM0A1 TSM FOC0B COM0A0 COM0B1 COM0B0 EEPROM Data Register INT7 INT6 EEPM1 INT5 EEPM0 INT4 EERIE INT3 EEMPE INT2 EEPE INT1 EERE INT0 General Purpose I/O Register 0 WGM02 CS02 CS01 WGM01 PSRASY CS00 WGM00 PSRSYNC
EEPROM Address Register High Byte
EEPROM Address Register Low Byte
12
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Address
0x1C (0x3C) 0x1B (0x3B) 0x1A (0x3A) 0x19 (0x39) 0x18 (0x38) 0x17 (0x37) 0x16 (0x36) 0x15 (0x35) 0x14 (0x34) 0x13 (0x33) 0x12 (0x32) 0x11 (0x31) 0x10 (0x30) 0x0F (0x2F) 0x0E (0x2E) 0x0D (0x2D) 0x0C (0x2C) 0x0B (0x2B) 0x0A (0x2A) 0x09 (0x29) 0x08 (0x28) 0x07 (0x27) 0x06 (0x26) 0x05 (0x25) 0x04 (0x24) 0x03 (0x23) 0x02 (0x22) 0x01 (0x21) 0x00 (0x20)
Name
EIFR PCIFR TIFR5 TIFR4 TIFR3 TIFR2 TIFR1 TIFR0 PORTG DDRG PING PORTF DDRF PINF PORTE DDRE PINE PORTD DDRD PIND PORTC DDRC PINC PORTB DDRB PINB PORTA DDRA PINA
Bit 7
INTF7 PORTF7 DDF7 PINF7 PORTE7 DDE7 PINE7 PORTD7 DDD7 PIND7 PORTC7 DDC7 PINC7 PORTB7 DDB7 PINB7 PORTA7 DDA7 PINA7
Bit 6
INTF6 PORTF6 DDF6 PINF6 PORTE6 DDE6 PINE6 PORTD6 DDD6 PIND6 PORTC6 DDC6 PINC6 PORTB6 DDB6 PINB6 PORTA6 DDA6 PINA6
Bit 5
INTF5 ICF5 ICF4 ICF3 ICF1 PORTG5 DDG5 PING5 PORTF5 DDF5 PINF5 PORTE5 DDE5 PINE5 PORTD5 DDD5 PIND5 PORTC5 DDC5 PINC5 PORTB5 DDB5 PINB5 PORTA5 DDA5 PINA5
Bit 4
INTF4 PORTG4 DDG4 PING4 PORTF4 DDF4 PINF4 PORTE4 DDE4 PINE4 PORTD4 DDD4 PIND4 PORTC4 DDC4 PINC4 PORTB4 DDB4 PINB4 PORTA4 DDA4 PINA4
Bit 3
INTF3 OCF5C OCF4C OCF3C OCF1C PORTG3 DDG3 PING3 PORTF3 DDF3 PINF3 PORTE3 DDE3 PINE3 PORTD3 DDD3 PIND3 PORTC3 DDC3 PINC3 PORTB3 DDB3 PINB3 PORTA3 DDA3 PINA3
Bit 2
INTF2 PCIF2 OCF5B OCF4B OCF3B OCF2B OCF1B OCF0B PORTG2 DDG2 PING2 PORTF2 DDF2 PINF2 PORTE2 DDE2 PINE2 PORTD2 DDD2 PIND2 PORTC2 DDC2 PINC2 PORTB2 DDB2 PINB2 PORTA2 DDA2 PINA2
Bit 1
INTF1 PCIF1 OCF5A OCF4A OCF3A OCF2A OCF1A OCF0A PORTG1 DDG1 PING1 PORTF1 DDF1 PINF1 PORTE1 DDE1 PINE1 PORTD1 DDD1 PIND1 PORTC1 DDC1 PINC1 PORTB1 DDB1 PINB1 PORTA1 DDA1 PINA1
Bit 0
INTF0 PCIF0 TOV5 TOV4 TOV3 TOV2 TOV1 TOV0 PORTG0 DDG0 PING0 PORTF0 DDF0 PINF0 PORTE0 DDE0 PINE0 PORTD0 DDD0 PIND0 PORTC0 DDC0 PINC0 PORTB0 DDB0 PINB0 PORTA0 DDA0 PINA0
Page
Note:
1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses should never be written. 2. I/O registers within the address range $00 - $1F are directly bit-accessible using the SBI and CBI instructions. In these registers, the value of single bits can be checked by using the SBIS and SBIC instructions. 3. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions will operate on all bits in the I/O register, writing a one back into any flag read as set, thus clearing the flag. The CBI and SBI instructions work with registers 0x00 to 0x1F only. 4. When using the I/O specific commands IN and OUT, the I/O addresses $00 - $3F must be used. When addressing I/O registers as data space using LD and ST instructions, $20 must be added to these addresses. The ATmega640/1280/1281/2560/2561 is a complex microcontroller with more peripheral units than can be supported within the 64 location reserved in Opcode for the IN and OUT instructions. For the Extended I/O space from $60 - $1FF in SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
13
2549AS-AVR-03/05
Instruction Set Summary
Mnemonics
ADD ADC ADIW SUB SUBI SBC SBCI SBIW AND ANDI OR ORI EOR COM NEG SBR CBR INC DEC TST CLR SER MUL MULS MULSU FMUL FMULS FMULSU RJMP IJMP EIJMP JMP RCALL ICALL EICALL CALL RET RETI CPSE CP CPC CPI SBRC SBRS SBIC SBIS BRBS BRBC BREQ BRNE BRCS BRCC BRSH BRLO BRMI BRPL BRGE BRLT BRHS BRHC BRTS BRTC Rd,Rr Rd,Rr Rd,Rr Rd,K Rr, b Rr, b P, b P, b s, k s, k k k k k k k k k k k k k k k k k k
Operands
Rd, Rr Rd, Rr Rdl,K Rd, Rr Rd, K Rd, Rr Rd, K Rdl,K Rd, Rr Rd, K Rd, Rr Rd, K Rd, Rr Rd Rd Rd,K Rd,K Rd Rd Rd Rd Rd Rd, Rr Rd, Rr Rd, Rr Rd, Rr Rd, Rr Rd, Rr k Add two Registers
Description
Rd Rd + Rr
Operation
Flags
Z,C,N,V,H Z,C,N,V,H Z,C,N,V,S Z,C,N,V,H Z,C,N,V,H Z,C,N,V,H Z,C,N,V,H Z,C,N,V,S Z,N,V Z,N,V Z,N,V Z,N,V Z,N,V Z,C,N,V Z,C,N,V,H Z,N,V Z,N,V Z,N,V Z,N,V Z,N,V Z,N,V None Z,C Z,C Z,C Z,C Z,C Z,C None None None None None None None None None I None Z, N,V,C,H Z, N,V,C,H Z, N,V,C,H None None None None None None None None None None None None None None None None None None None None
#Clocks
1 1 2 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 3 4 4 4 5 5 5 1/2/3 1 1 1 1/2/3 1/2/3 1/2/3 1/2/3 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2
ARITHMETIC AND LOGIC INSTRUCTIONS Add with Carry two Registers Add Immediate to Word Subtract two Registers Subtract Constant from Register Subtract with Carry two Registers Subtract with Carry Constant from Reg. Subtract Immediate from Word Logical AND Registers Logical AND Register and Constant Logical OR Registers Logical OR Register and Constant Exclusive OR Registers One's Complement Two's Complement Set Bit(s) in Register Clear Bit(s) in Register Increment Decrement Test for Zero or Minus Clear Register Set Register Multiply Unsigned Multiply Signed Multiply Signed with Unsigned Fractional Multiply Unsigned Fractional Multiply Signed Fractional Multiply Signed with Unsigned Relative Jump Indirect Jump to (Z) Extended Indirect Jump to (Z) Direct Jump Relative Subroutine Call Indirect Call to (Z) Extended Indirect Call to (Z) Direct Subroutine Call Subroutine Return Interrupt Return Compare, Skip if Equal Compare Compare with Carry Compare Register with Immediate Skip if Bit in Register Cleared Skip if Bit in Register is Set Skip if Bit in I/O Register Cleared Skip if Bit in I/O Register is Set Branch if Status Flag Set Branch if Status Flag Cleared Branch if Equal Branch if Not Equal Branch if Carry Set Branch if Carry Cleared Branch if Same or Higher Branch if Lower Branch if Minus Branch if Plus Branch if Greater or Equal, Signed Branch if Less Than Zero, Signed Branch if Half Carry Flag Set Branch if Half Carry Flag Cleared Branch if T Flag Set Branch if T Flag Cleared Rd Rd + Rr + C Rdh:Rdl Rdh:Rdl + K Rd Rd - Rr Rd Rd - K Rd Rd - Rr - C Rd Rd - K - C Rdh:Rdl Rdh:Rdl - K Rd Rd * Rr Rd Rd * K Rd Rd v Rr Rd Rd v K Rd Rd Rr Rd 0xFF - Rd Rd 0x00 - Rd Rd Rd v K Rd Rd * (0xFF - K) Rd Rd + 1 Rd Rd - 1 Rd Rd * Rd Rd Rd Rd Rd 0xFF R1:R0 Rd x Rr R1:R0 Rd x Rr R1:R0 Rd x Rr
1 R1:R0 (Rd x Rr) << 1 R1:R0 (Rd x Rr) << 1
PC PC + k + 1 PC Z PC (EIND:Z) PC k PC PC + k + 1 PC Z PC (EIND:Z) PC k PC STACK PC STACK if (Rd = Rr) PC PC + 2 or 3 Rd - Rr Rd - Rr - C Rd - K if (Rr(b)=0) PC PC + 2 or 3 if (Rr(b)=1) PC PC + 2 or 3 if (P(b)=0) PC PC + 2 or 3 if (P(b)=1) PC PC + 2 or 3 if (SREG(s) = 1) then PCPC+k + 1 if (SREG(s) = 0) then PCPC+k + 1 if (Z = 1) then PC PC + k + 1 if (Z = 0) then PC PC + k + 1 if (C = 1) then PC PC + k + 1 if (C = 0) then PC PC + k + 1 if (C = 0) then PC PC + k + 1 if (C = 1) then PC PC + k + 1 if (N = 1) then PC PC + k + 1 if (N = 0) then PC PC + k + 1 if (N V= 0) then PC PC + k + 1 if (N V= 1) then PC PC + k + 1 if (H = 1) then PC PC + k + 1 if (H = 0) then PC PC + k + 1 if (T = 1) then PC PC + k + 1 if (T = 0) then PC PC + k + 1
R1:R0 (Rd x Rr) <<
BRANCH INSTRUCTIONS
14
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Mnemonics
BRVS BRVC BRIE BRID SBI CBI LSL LSR ROL ROR ASR SWAP BSET BCLR BST BLD SEC CLC SEN CLN SEZ CLZ SEI CLI SES CLS SEV CLV SET CLT SEH CLH DATA TRANSFER INSTRUCTIONS MOV MOVW LDI LD LD LD LD LD LD LDD LD LD LD LDD LDS ST ST ST ST ST ST STD ST ST ST STD STS LPM LPM LPM ELPM ELPM Rd, Z Rd, Z Rd, Z+ Rd, Rr Rd, Rr Rd, K Rd, X Rd, X+ Rd, - X Rd, Y Rd, Y+ Rd, - Y Rd,Y+q Rd, Z Rd, Z+ Rd, -Z Rd, Z+q Rd, k X, Rr X+, Rr - X, Rr Y, Rr Y+, Rr - Y, Rr Y+q,Rr Z, Rr Z+, Rr -Z, Rr Z+q,Rr k, Rr Move Between Registers Copy Register Word Load Immediate Load Indirect Load Indirect and Post-Inc. Load Indirect and Pre-Dec. Load Indirect Load Indirect and Post-Inc. Load Indirect and Pre-Dec. Load Indirect with Displacement Load Indirect Load Indirect and Post-Inc. Load Indirect and Pre-Dec. Load Indirect with Displacement Load Direct from SRAM Store Indirect Store Indirect and Post-Inc. Store Indirect and Pre-Dec. Store Indirect Store Indirect and Post-Inc. Store Indirect and Pre-Dec. Store Indirect with Displacement Store Indirect Store Indirect and Post-Inc. Store Indirect and Pre-Dec. Store Indirect with Displacement Store Direct to SRAM Load Program Memory Load Program Memory Load Program Memory and Post-Inc Extended Load Program Memory Extended Load Program Memory Rd Rr Rd+1:Rd Rr+1:Rr Rd K Rd (X) Rd (X), X X + 1 X X - 1, Rd (X) Rd (Y) Rd (Y), Y Y + 1 Y Y - 1, Rd (Y) Rd (Y + q) Rd (Z) Rd (Z), Z Z+1 Z Z - 1, Rd (Z) Rd (Z + q) Rd (k) (X) Rr (X) Rr, X X + 1 X X - 1, (X) Rr (Y) Rr (Y) Rr, Y Y + 1 Y Y - 1, (Y) Rr (Y + q) Rr (Z) Rr (Z) Rr, Z Z + 1 Z Z - 1, (Z) Rr (Z + q) Rr (k) Rr R0 (Z) Rd (Z) Rd (Z), Z Z+1 R0 (RAMPZ:Z) Rd (Z) None None None None None None None None None None None None None None None None None None None None None None None None None None None None None None None None 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 k k k k P,b P,b Rd Rd Rd Rd Rd Rd s s Rr, b Rd, b
Operands
Description
Branch if Overflow Flag is Set Branch if Overflow Flag is Cleared Branch if Interrupt Enabled Branch if Interrupt Disabled Set Bit in I/O Register Clear Bit in I/O Register Logical Shift Left Logical Shift Right Rotate Left Through Carry Rotate Right Through Carry Arithmetic Shift Right Swap Nibbles Flag Set Flag Clear Bit Store from Register to T Bit load from T to Register Set Carry Clear Carry Set Negative Flag Clear Negative Flag Set Zero Flag Clear Zero Flag Global Interrupt Enable Global Interrupt Disable Set Signed Test Flag Clear Signed Test Flag Set Twos Complement Overflow. Clear Twos Complement Overflow Set T in SREG Clear T in SREG Set Half Carry Flag in SREG Clear Half Carry Flag in SREG
Operation
if (V = 1) then PC PC + k + 1 if (V = 0) then PC PC + k + 1 if ( I = 1) then PC PC + k + 1 if ( I = 0) then PC PC + k + 1 I/O(P,b) 1 I/O(P,b) 0 Rd(n+1) Rd(n), Rd(0) 0 Rd(n) Rd(n+1), Rd(7) 0 Rd(0)C,Rd(n+1) Rd(n),CRd(7) Rd(7)C,Rd(n) Rd(n+1),CRd(0) Rd(n) Rd(n+1), n=0..6 Rd(3..0)Rd(7..4),Rd(7..4)Rd(3..0) SREG(s) 1 SREG(s) 0 T Rr(b) Rd(b) T C1 C0 N1 N0 Z1 Z0 I1 I0 S1 S0 V1 V0 T1 T0 H1 H0
Flags
None None None None None None Z,C,N,V Z,C,N,V Z,C,N,V Z,C,N,V Z,C,N,V None SREG(s) SREG(s) T None C C N N Z Z I I S S V V T T H H
#Clocks
1/2 1/2 1/2 1/2 2 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
BIT AND BIT-TEST INSTRUCTIONS
15
2549AS-AVR-03/05
Mnemonics
ELPM SPM IN OUT PUSH POP NOP SLEEP WDR BREAK
Operands
Rd, Z+ Rd, P P, Rr Rr Rd Store Program Memory In Port Out Port Push Register on Stack
Description
Extended Load Program Memory (Z) R1:R0 Rd P P Rr STACK Rr Rd STACK
Operation
Rd (RAMPZ:Z), RAMPZ:Z RAMPZ:Z+1
Flags
None None None None None None None
#Clocks
3 1 1 2 2 1 1 1 N/A
Pop Register from Stack No Operation Sleep Watchdog Reset Break
MCU CONTROL INSTRUCTIONS (see specific descr. for Sleep function) (see specific descr. for WDR/timer) For On-chip Debug Only None None None
EICALL and EIJMP do not exist in ATmega640/1280/1281. ELPM does not exist in ATmega640.
16
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Ordering Information
ATmega1281/2561
Speed (MHz)(2) Power Supply Ordering Code ATmega1281/2561V-8AI ATmega1281/2561V-8AU(3) ATmega1281/2561V-8MI ATmega1281/2561V-8MU(3) ATmega1281/2561-16AI ATmega1281/2561-16AU(3) ATmega1281/2561-16MI ATmega1281/2561-16MU(3) Package(1) 64A 64A 64M1 64M1 64A 64M1 64A 64M1 Operation Range Industrial (-40C to 85C)
8
1.8 - 5.5V
16
4.5 - 5.5V
Industrial (-40C to 85C)
Notes:
1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information and minimum quantities. 2. See "Maximum speed vs. VCC" on page 370. 3. Pb-free packaging alternative, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also Halide free and fully Green.
Package Type 64A 64M1 100A 64-Lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP) 64-pad, 9 x 9 x 1.0 mm body, lead pitch 0.50 mm, Micro Lead Frame Package (QFN/MLF) 100-Lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
17
2549AS-AVR-03/05
ATmega640/1280/2560
Speed (MHz)(2) 8 16 Notes: Power Supply 1.8 - 5.5V 4.5 - 5.5V Ordering Code ATmega640/1280/2560V-8AI ATmega640/1280/2560V-8AU(3) ATmega640/1280/2560-16AI ATmega640/1280/2560-16AU(3) Package(1) 100A 100A 100A 100A Operation Range Industrial (-40C to 85C) Industrial (-40C to 85C)
1. This device can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information and minimum quantities. 2. See "Maximum speed vs. VCC" on page 370. 3. Pb-free packaging alternative, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also Halide free and fully Green.
Package Type 64A 64M1 100A 64-Lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP) 64-pad, 9 x 9 x 1.0 mm body, lead pitch 0.50 mm, Micro Lead Frame Package (QFN/MLF) 100-Lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
18
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Packaging Information
100A
PIN 1 B
PIN 1 IDENTIFIER
e
E1
E
D1 D C
0~7 A1 L
COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL A A1 A2 D D1 E MIN - 0.05 0.95 15.75 13.90 15.75 13.90 0.17 0.09 0.45 NOM - - 1.00 16.00 14.00 16.00 14.00 - - - 0.50 TYP MAX 1.20 0.15 1.05 16.25 14.10 16.25 14.10 0.27 0.20 0.75 Note 2 Note 2 NOTE
A2
A
Notes:
1. This package conforms to JEDEC reference MS-026, Variation AED. 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is 0.25 mm per side. Dimensions D1 and E1 are maximum plastic body size dimensions including mold mismatch. 3. Lead coplanarity is 0.08 mm maximum.
E1 B C L e
10/5/2001 2325 Orchard Parkway San Jose, CA 95131 TITLE 100A, 100-lead, 14 x 14 mm Body Size, 1.0 mm Body Thickness, 0.5 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP) DRAWING NO. 100A REV. C
R
19
2549AS-AVR-03/05
64A
PIN 1 B
PIN 1 IDENTIFIER
e
E1
E
D1 D C
0~7 A1 L
COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL A A1 A2 D D1 E MIN - 0.05 0.95 15.75 13.90 15.75 13.90 0.30 0.09 0.45 NOM - - 1.00 16.00 14.00 16.00 14.00 - - - 0.80 TYP MAX 1.20 0.15 1.05 16.25 14.10 16.25 14.10 0.45 0.20 0.75 Note 2 Note 2 NOTE
A2
A
Notes:
1. This package conforms to JEDEC reference MS-026, Variation AEB. 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is 0.25 mm per side. Dimensions D1 and E1 are maximum plastic body size dimensions including mold mismatch. 3. Lead coplanarity is 0.10 mm maximum.
E1 B C L e
10/5/2001 2325 Orchard Parkway San Jose, CA 95131 TITLE 64A, 64-lead, 14 x 14 mm Body Size, 1.0 mm Body Thickness, 0.8 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP) DRAWING NO. 64A REV. B
R
20
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
64M1
D
Marked Pin# 1 ID
E
C
TOP VIEW
SEATING PLANE
A1 A
K L D2
Pin #1 Corner
0.08 C
SIDE VIEW
1 2 3
Option A
Pin #1 Triangle
COMMON DIMENSIONS (Unit of Measure = mm) SYMBOL
Option B
Pin #1 Chamfer (C 0.30)
E2
MIN 0.80 - 0.23
NOM 0.90 0.02 0.25 9.00 BSC
MAX 1.00 0.05 0.28
NOTE
A A1 b D
K b e
Option C
D2
Pin #1 Notch (0.20 R)
5.20
5.40 9.00 BSC
5.60
E E2 e L 0.35 0.20 5.20
5.40 0.50 BSC 0.40 -
5.60
BOTTOM VIEW
0.45 -
Note: JEDEC Standard MO-220, (SAW Singulation) Fig. 1, VMMD.
K
8/19/04 2325 Orchard Parkway San Jose, CA 95131 TITLE 64M1, 64-pad, 9 x 9 x 1.0 mm Body, Lead Pitch 0.50 mm, 5.40 mm Exposed Pad, Micro Lead Frame Package (MLF) DRAWING NO. 64M1 REV. D
R
21
2549AS-AVR-03/05
Errata
ATmega640 rev. A
No errata.
ATMEGA1280 rev. A
No errata.
ATMEGA1280 rev. A
No errata.
ATmega2560 rev. A
* Non-Read-While-Write area of flash not functional * Part does not work under 2.0 Volts 1. Non-Read-While-Write area of flash not functional The Non-Read-While-Write area of the flash is not working as expected. The problem is related to the speed of the part when reading the flash of this area. Problem Fix/Workaround - Only use the first 248K of the flash. - If boot functionality is needed, run the code in the Non-Read-While-Write area at maximum 1/4th of the maximum frequency of the device at any given voltage. This is done by writing the CLKPR register before entering the boot section of the code 2. Part does not work under 2.0 Volts The part does not execute code correctly below 2.0 Volts Problem Fix/Workaround Do not use the part at voltages below 2.0 Volts.
ATmega2561 rev. A
* Non-Read-While-Write area of flash not functional * Part does not work under 2.0 Volts 1. Non-Read-While-Write area of flash not functional The Non-Read-While-Write area of the flash is not working as expected. The problem is related to the speed of the part when reading the flash of this area. Problem Fix/Workaround - Only use the first 248K of the flash. - If boot functionality is needed, run the code in the Non-Read-While-Write area at maximum 1/4th of the maximum frequency of the device at any given voltage. This is done by writing the CLKPR register before entering the boot section of the code 2. Part does not work under 2.0 Volts The part does not execute code correctly below 2.0 Volts Problem Fix/Workaround Do not use the part at voltages below 2.0 Volts.
22
ATmega640/1280/1281/2560/2561
2549AS-AVR-03/05
ATmega640/1280/1281/2560/2561
Datasheet Revision History
Rev. 2549A-12/04
1. Initial version. Please note that the referring page numbers in this section are referring to this document.The referring revision in this section are referring to the document revision.
23
2549AS-AVR-03/05
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2549AS-AVR-03/05

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