ATMEL ATMEGA1280V

Features
• High Performance, Low Power Atmel® AVR® 8-Bit Microcontroller
• Advanced RISC Architecture
•
•
•
•
•
•
•
•
– 135 Powerful Instructions – Most Single Clock Cycle Execution
– 32 × 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16 MHz
– On-Chip 2-cycle Multiplier
High Endurance Non-volatile Memory Segments
– 64K/128K/256K Bytes of In-System Self-Programmable Flash
– 4 Kbytes EEPROM
– 8 Kbytes Internal SRAM
– Write/Erase Cycles:10,000 Flash/100,000 EEPROM
– Data retention: 20 years at 85°C/ 100 years at 25°C
– Optional Boot Code Section with Independent Lock Bits
• In-System Programming by On-chip Boot Program
• True Read-While-Write Operation
– Programming Lock for Software Security
• Endurance: Up to 64 Kbytes Optional External Memory Space
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 (ATmega1281/2561, ATmega640/1280/2560)
– 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
– 54/86 Programmable I/O Lines (ATmega1281/2561, ATmega640/1280/2560)
– 64-pad QFN/MLF, 64-lead TQFP (ATmega1281/2561)
– 100-lead TQFP, 100-ball CBGA (ATmega640/1280/2560)
– RoHS/Fully Green
Temperature Range:
– -40°C to 85°C Industrial
Ultra-Low Power Consumption
– Active Mode: 1 MHz, 1.8V: 500 µA
– Power-down Mode: 0.1 µA at 1.8V
Speed Grade:
– ATmega640V/ATmega1280V/ATmega1281V:
• 0 - 4 MHz @ 1.8V - 5.5V, 0 - 8 MHz @ 2.7V - 5.5V
– ATmega2560V/ATmega2561V:
• 0 - 2 MHz @ 1.8V - 5.5V, 0 - 8 MHz @ 2.7V - 5.5V
– ATmega640/ATmega1280/ATmega1281:
• 0 - 8 MHz @ 2.7V - 5.5V, 0 - 16 MHz @ 4.5V - 5.5V
– ATmega2560/ATmega2561:
• 0 - 16 MHz @ 4.5V - 5.5V
8-bit
Microcontroller
with
64K/128K/256K
Bytes In-System
Programmable
Flash
ATmega640/V
ATmega1280/V
ATmega1281/V
ATmega2560/V
ATmega2561/V
Preliminary
Summary
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
1. Pin Configurations
81
80
PA2 (AD2)
82
PA1 (AD1)
83
PJ7
84
PA0 (AD0)
85
GND
86
VCC
87
PK7 (ADC15/PCINT23)
88
PK5 (ADC13/PCINT21)
89
PK6 (ADC14/PCINT22)
90
PK3 (ADC11/PCINT19)
91
PK4 (ADC12/PCINT20)
92
PK1 (ADC9/PCINT17)
93
PK2 (ADC10/PCINT18)
PK0 (ADC8/PCINT16)
94
PF7 (ADC7/TDI)
95
PF6 (ADC6/TDO)
96
PF4 (ADC4/TCK)
97
PF5 (ADC5/TMS)
PF1 (ADC1)
98
PF2 (ADC2)
PF0 (ADC0)
100 99
PF3 (ADC3)
GND
AREF
TQFP-pinout ATmega640/1280/2560
AVCC
Figure 1-1.
79
78
77
76
(OC0B) PG5
1
75
PA3 (AD3)
(RXD0/PCINT8) PE0
2
74
PA4 (AD4)
INDEX CORNER
(TXD0) PE1
3
73
PA5 (AD5)
(XCK0/AIN0) PE2
4
72
PA6 (AD6)
(OC3A/AIN1) PE3
5
71
PA7 (AD7)
(OC3B/INT4) PE4
6
70
PG2 (ALE)
(OC3C/INT5) PE5
7
69
PJ6 (PCINT15)
(T3/INT6) PE6
8
68
PJ5 (PCINT14)
(CLKO/ICP3/INT7) PE7
9
67
PJ4 (PCINT13)
VCC
10
66
PJ3 (PCINT12)
GND
11
65
PJ2 (XCK3/PCINT11)
(RXD2) PH0
12
64
PJ1 (TXD3/PCINT10)
(TXD2) PH1
13
63
PJ0 (RXD3/PCINT9)
(XCK2) PH2
14
62
GND
(OC4A) PH3
15
61
VCC
(OC4B) PH4
16
60
PC7 (A15)
(OC4C) PH5
17
59
PC6 (A14)
(OC2B) PH6
18
58
PC5 (A13)
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
(T1) PD6
31
(T0) PD7
30
(ICP1) PD4
29
(XCK1) PD5
28
(TXD1/INT3) PD3
27
(RXD1/INT2) PD2
26
(SDA/INT1) PD1
PG0 (WR)
PL7
51
(SCL/INT0) PD0
25
PL6
(OC1B/PCINT6) PB6
(OC5C) PL5
PG1 (RD)
(OC5A) PL3
PC0 (A8)
52
(OC5B) PL4
53
24
(T5) PL2
23
(OC1A/PCINT5) PB5
(ICP5) PL1
(OC2A/PCINT4) PB4
(ICP4) PL0
PC1 (A9)
XTAL2
PC2 (A10)
54
XTAL1
55
22
VCC
21
(MISO/PCINT3) PB3
GND
(MOSI/PCINT2) PB2
RESET
PC3 (A11)
(TOSC1) PG4
PC4 (A12)
56
(T4) PH7
57
20
(TOSC2) PG3
19
(OC0A/OC1C/PCINT7) PB7
(SS/PCINT0) PB0
(SCK/PCINT1) PB1
2
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Figure 1-2.
CBGA-pinout ATmega640/1280/2560
Top view
1
2
3
4
5
6
Bottom view
7
8
9
10
10
9
8
7
6
5
4
3
2
1
A
A
B
B
C
C
D
D
E
E
F
F
G
G
H
H
J
J
K
K
Table 1-1.
CBGA-pinout ATmega640/1280/2560
1
2
3
4
5
6
7
8
9
10
A
GND
AREF
PF0
PF2
PF5
PK0
PK3
PK6
GND
VCC
B
AVCC
PG5
PF1
PF3
PF6
PK1
PK4
PK7
PA0
PA2
C
PE2
PE0
PE1
PF4
PF7
PK2
PK5
PJ7
PA1
PA3
D
PE3
PE4
PE5
PE6
PH2
PA4
PA5
PA6
PA7
PG2
E
PE7
PH0
PH1
PH3
PH5
PJ6
PJ5
PJ4
PJ3
PJ2
F
VCC
PH4
PH6
PB0
PL4
PD1
PJ1
PJ0
PC7
GND
G
GND
PB1
PB2
PB5
PL2
PD0
PD5
PC5
PC6
VCC
H
PB3
PB4
RESET
PL1
PL3
PL7
PD4
PC4
PC3
PC2
J
PH7
PG3
PB6
PL0
XTAL2
PL6
PD3
PC1
PC0
PG1
K
PB7
PG4
VCC
GND
XTAL1
PL5
PD2
PD6
PD7
PG0
Note:
The functions for each pin is the same as for the 100 pin packages shown in Figure 1-1 on page 2.
3
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
AVCC
GND
AREF
PF0 (ADC0)
PF1 (ADC1)
PF2 (ADC2)
PF3 (ADC3)
PF4 (ADC4/TCK)
PF5 (ADC5/TMS)
PF6 (ADC6/TDO)
PF7 (ADC7/TDI)
GND
VCC
PA0 (AD0)
PA1 (AD1)
PA2 (AD2)
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
Pinout ATmega1281/2561
64
Figure 1-3.
(OC0B) PG5
1
48
PA3 (AD3)
(RXD0/ PCINT8 /PDI) PE0
2
47
PA4 (AD4)
46
PA5 (AD5)
INDEX CORNER
(TXD0/PDO) PE1
3
(XCK0/AIN0) PE2
4
45
PA6 (AD6)
(OC3A/AIN1) PE3
5
44
PA7 (AD7)
(OC3B/INT4) PE4
6
43
PG2 (ALE)
(OC3C/INT5) PE5
7
42
PC7 (A15 )
41
PC6 (A14)
(T3/INT6) PE6
8
(ICP3/ CLKO /INT7) PE7
9
40
PC5 (A13)
(SS/ PCINT0 ) PB0
10
39
PC4 (A12)
(SCK/ PCINT1 ) PB1
11
38
PC3 (A11)
(MOSI/ PCINT2 ) PB2
12
37
PC2 (A10)
(MISO/ PCINT3 ) PB3
13
36
PC1 (A9)
(OC2A/ PCINT4 ) PB4
14
35
PC0 (A8)
(OC1A/ PCINT5 ) PB5
15
34
PG1 (RD)
(OC1B/ PCINT6 ) PB6
16
33
PG0 (WR)
Note:
26
27
28
29
30
31
32
(SDA/INT1) PD1
(RXD1/INT2) PD2
(TXD1/INT3) PD3
(ICP1) PD4
(XCK1) PD5
(T1) PD6
(T0) PD7
24
XTAL1
25
23
XTAL2
(SCL/INT0) PD0
22
GND
20
RESET
21
19
(TOSC1) PG4
VCC
18
(TOSC2) PG3
(OC0A/OC1C/ PCINT7 ) PB7
17
ATmega1281/2561
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.
4
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
2. 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.
2.1
Block Diagram
Figure 2-1.
Block Diagram
PF7..0
PK7..0
PORT F (8)
PORT K (8)
PJ7..0
PE7..0
VCC
Power
Supervision
POR/ BOD &
RESET
RESET
GND
PORT J (8)
PORT E (8)
Watchdog
Timer
Watchdog
Oscillator
Analog
Comparator
JTAG
A/D
Converter
EEPROM
Internal
Bandgap reference
USART 0
XTAL1
Oscillator
Circuits /
Clock
Generation
16 bit T/C 3
USART 3
16 bit T/C 5
XTAL2
CPU
PA7..0
PORT A (8)
16 bit T/C 4
USART 1
PG5..0
PORT G (6)
XRAM
PC7..0
PORT C (8)
TWI
FLASH
SPI
SRAM
16 bit T/C 1
8 bit T/C 0
USART 2
8 bit T/C 2
NOTE:
Shaded parts only available
in the 100-pin version.
Complete functionality for
the ADC, T/C4, and T/C5 only
available 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
5
2549MS–AVR–09/10
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, 4 Kbytes EEPROM, 8
Kbytes 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, 10-bit 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 Powersave 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 Onchip 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-Programmable Flash on a monolithic chip,
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.
6
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
2.2
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 2-1 summarizes the different configurations for the six devices.
Table 2-1.
Configuration Summary
Flash
EEPROM
RAM
General
Purpose I/O pins
16 bits resolution
PWM channels
Serial
USARTs
ADC
Channels
ATmega640
64KB
4KB
8KB
86
12
4
16
ATmega1280
128KB
4KB
8KB
86
12
4
16
ATmega1281
128KB
4KB
8KB
54
6
2
8
ATmega2560
256KB
4KB
8KB
86
12
4
16
ATmega2561
256KB
4KB
8KB
54
6
2
8
Device
2.3
2.3.1
Pin Descriptions
VCC
Digital supply voltage.
2.3.2
GND
Ground.
2.3.3
Port A (PA7..PA0)
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
ATmega640/1280/1281/2560/2561 as listed on page 78.
2.3.4
special
features
of
the
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
ATmega640/1280/1281/2560/2561 as listed on page 79.
2.3.5
special
features
of
the
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
7
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
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 features of the ATmega640/1280/1281/2560/2561 as
listed on page 82.
2.3.6
Port D (PD7..PD0)
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 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
ATmega640/1280/1281/2560/2561 as listed on page 83.
2.3.7
features
of
the
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
ATmega640/1280/1281/2560/2561 as listed on page 86.
2.3.8
special
special
features
of
the
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.
2.3.9
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
ATmega640/1280/1281/2560/2561 as listed on page 90.
2.3.10
special
features
of
the
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
8
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
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 ATmega640/1280/2560 as
listed on page 92.
2.3.11
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 ATmega640/1280/2560 as
listed on page 94.
2.3.12
Port K (PK7..PK0)
Port K serves as analog inputs to the A/D Converter.
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 ATmega640/1280/2560 as
listed on page 96.
2.3.13
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 ATmega640/1280/2560 as
listed on page 98.
2.3.14
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 “System and Reset
Characteristics” on page 372. Shorter pulses are not guaranteed to generate a reset.
2.3.15
XTAL1
Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.
2.3.16
XTAL2
Output from the inverting Oscillator amplifier.
9
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
2.3.17
AVCC
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.
2.3.18
AREF
This is the analog reference pin for the A/D Converter.
10
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
3. Resources
A comprehensive set of development tools and application notes, and datasheets are available
for download on http://www.atmel.com/avr.
4. About Code Examples
This documentation contains simple code examples that briefly show how to use various parts of
the device. Be aware that not all C compiler vendors include bit definitions in the header files
and interrupt handling in C is compiler dependent. Please confirm with the C compiler documentation for more details.
These code examples assume that the part specific header file is included before compilation.
For I/O registers located in extended I/O map, "IN", "OUT", "SBIS", "SBIC", "CBI", and "SBI"
instructions must be replaced with instructions that allow access to extended I/O. Typically
"LDS" and "STS" combined with "SBRS", "SBRC", "SBR", and "CBR".
5. Data Retention
Reliability Qualification results show that the projected data retention failure rate is much less
than 1 ppm over 20 years at 85°C or 100 years at 25°C.
11
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
32. Register Summary
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(0x1FF)
Reserved
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
...
Reserved
(0x13F)
Reserved
(0x13E)
Reserved
(0x13D)
Reserved
(0x13C)
Reserved
(0x13B)
Reserved
(0x13A)
Reserved
(0x139)
Reserved
(0x138)
Reserved
(0x137)
Reserved
(0x136)
UDR3
(0x135)
UBRR3H
USART3 I/O Data Register
(0x134)
UBRR3L
(0x133)
Reserved
-
-
(0x132)
UCSR3C
UMSEL31
(0x131)
UCSR3B
RXCIE3
-
222
USART3 Baud Rate Register High Byte
227
USART3 Baud Rate Register Low Byte
-
-
-
UMSEL30
UPM31
UPM30
TXCIE3
UDRIE3
RXEN3
Page
227
-
-
-
USBS3
UCSZ31
UCSZ30
UCPOL3
239
TXEN3
UCSZ32
RXB83
TXB83
238
238
(0x130)
UCSR3A
RXC3
TXC3
UDRE3
FE3
DOR3
UPE3
U2X3
MPCM3
(0x12F)
Reserved
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
(0x12E)
Reserved
(0x12D)
OCR5CH
Timer/Counter5 - Output Compare Register C High Byte
165
(0x12C)
OCR5CL
Timer/Counter5 - Output Compare Register C Low Byte
165
(0x12B)
OCR5BH
Timer/Counter5 - Output Compare Register B High Byte
165
(0x12A)
OCR5BL
Timer/Counter5 - Output Compare Register B Low Byte
165
(0x129)
OCR5AH
Timer/Counter5 - Output Compare Register A High Byte
164
(0x128)
OCR5AL
Timer/Counter5 - Output Compare Register A Low Byte
164
(0x127)
ICR5H
Timer/Counter5 - Input Capture Register High Byte
165
(0x126)
ICR5L
Timer/Counter5 - Input Capture Register Low Byte
165
(0x125)
TCNT5H
Timer/Counter5 - Counter Register High Byte
163
(0x124)
TCNT5L
(0x123)
Reserved
-
-
-
Timer/Counter5 - Counter Register Low Byte
-
-
163
-
-
-
(0x122)
TCCR5C
FOC5A
FOC5B
FOC5C
-
-
-
-
-
162
(0x121)
TCCR5B
ICNC5
ICES5
-
WGM53
WGM52
CS52
CS51
CS50
160
(0x120)
TCCR5A
COM5A1
COM5A0
COM5B1
COM5B0
COM5C1
COM5C0
WGM51
WGM50
158
(0x11F)
Reserved
-
-
-
-
-
-
-
-
(0x11E)
Reserved
-
-
-
-
-
-
-
-
(0x11D)
Reserved
-
-
-
-
-
-
-
-
(0x11C)
Reserved
-
-
-
-
-
-
-
-
(0x11B)
Reserved
-
-
-
-
-
-
-
-
(0x11A)
Reserved
-
-
-
-
-
-
-
-
(0x119)
Reserved
-
-
-
-
-
-
-
-
(0x118)
Reserved
-
-
-
-
-
-
-
-
(0x117)
Reserved
-
-
-
-
-
-
-
-
(0x116)
Reserved
-
-
-
-
-
-
-
-
(0x115)
Reserved
-
-
-
-
-
-
-
-
(0x114)
Reserved
-
-
-
-
-
-
-
-
(0x113)
Reserved
-
-
-
-
-
-
-
-
(0x112)
Reserved
-
-
-
-
-
-
-
-
(0x111)
Reserved
-
-
-
-
-
-
-
-
(0x110)
Reserved
-
-
-
-
-
-
-
-
(0x10F)
Reserved
-
-
-
-
-
-
-
-
(0x10E)
Reserved
-
-
-
-
-
-
-
-
(0x10D)
Reserved
-
-
-
-
-
-
-
-
(0x10C)
Reserved
-
-
-
-
-
-
-
-
(0x10B)
PORTL
PORTL7
PORTL6
PORTL5
PORTL4
PORTL3
PORTL2
PORTL1
PORTL0
104
(0x10A)
DDRL
DDL7
DDL6
DDL5
DDL4
DDL3
DDL2
DDL1
DDL0
104
(0x109)
PINL
PINL7
PINL6
PINL5
PINL4
PINL3
PINL2
PINL1
PINL0
104
(0x108)
PORTK
PORTK7
PORTK6
PORTK5
PORTK4
PORTK3
PORTK2
PORTK1
PORTK0
103
(0x107)
DDRK
DDK7
DDK6
DDK5
DDK4
DDK3
DDK2
DDK1
DDK0
103
(0x106)
PINK
PINK7
PINK6
PINK5
PINK4
PINK3
PINK2
PINK1
PINK0
103
(0x105)
PORTJ
PORTJ7
PORTJ6
PORTJ5
PORTJ4
PORTJ3
PORTJ2
PORTJ1
PORTJ0
103
(0x104)
DDRJ
DDJ7
DDJ6
DDJ5
DDJ4
DDJ3
DDJ2
DDJ1
DDJ0
103
(0x103)
PINJ
PINJ7
PINJ6
PINJ5
PINJ4
PINJ3
PINJ2
PINJ1
PINJ0
103
(0x102)
PORTH
PORTH7
PORTH6
PORTH5
PORTH4
PORTH3
PORTH2
PORTH1
PORTH0
102
(0x101)
DDRH
DDH7
DDH6
DDH5
DDH4
DDH3
DDH2
DDH1
DDH0
103
410
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
(0x100)
PINH
PINH7
PINH6
PINH5
PINH4
PINH3
PINH2
PINH1
PINH0
103
(0xFF)
Reserved
-
-
-
-
-
-
-
-
(0xFE)
Reserved
-
-
-
-
-
-
-
-
(0xFD)
Reserved
-
-
-
-
-
-
-
-
(0xFC)
Reserved
-
-
-
-
-
-
-
-
(0xFB)
Reserved
-
-
-
-
-
-
-
-
(0xFA)
Reserved
-
-
-
-
-
-
-
-
(0xF9)
Reserved
-
-
-
-
-
-
-
-
(0xF8)
Reserved
-
-
-
-
-
-
-
-
(0xF7)
Reserved
-
-
-
-
-
-
-
-
(0xF6)
Reserved
-
-
-
-
-
-
-
-
(0xF5)
Reserved
-
-
-
-
-
-
-
-
(0xF4)
Reserved
-
-
-
-
-
-
-
-
(0xF3)
Reserved
-
-
-
-
-
-
-
-
(0xF2)
Reserved
-
-
-
-
-
-
-
-
(0xF1)
Reserved
-
-
-
-
-
-
-
-
(0xF0)
Reserved
-
-
-
-
-
-
-
-
(0xEF)
Reserved
-
-
-
-
-
-
-
-
(0xEE)
Reserved
-
-
-
-
-
-
-
-
(0xED)
Reserved
-
-
-
-
-
-
-
-
(0xEC)
Reserved
-
-
-
-
-
-
-
-
(0xEB)
Reserved
-
-
-
-
-
-
-
(0xEA)
Reserved
-
-
-
-
-
-
-
-
(0xE9)
Reserved
-
-
-
-
-
-
-
-
(0xE8)
Reserved
-
-
-
-
-
-
-
-
(0xE7)
Reserved
-
-
-
-
-
-
-
(0xE6)
Reserved
-
-
-
-
-
-
-
-
(0xE5)
Reserved
-
-
-
-
-
-
-
-
(0xE4)
Reserved
-
-
-
-
-
-
-
-
(0xE3)
Reserved
-
-
-
-
-
-
-
(0xE2)
Reserved
-
-
-
-
-
-
-
(0xE1)
Reserved
-
-
-
-
-
-
-
(0xE0)
Reserved
-
-
-
-
-
-
-
(0xDF)
Reserved
-
-
-
-
-
-
-
-
(0xDE)
Reserved
-
-
-
-
-
-
-
-
(0xDD)
Reserved
-
-
-
-
-
-
-
(0xDC)
Reserved
-
-
-
-
-
-
-
-
(0xDB)
Reserved
-
-
-
-
-
-
-
-
(0xDA)
Reserved
-
-
-
-
-
-
-
-
(0xD9)
Reserved
-
-
-
-
-
-
-
(0xD8)
Reserved
-
-
-
-
-
-
-
-
(0xD7)
Reserved
-
-
-
-
-
-
-
-
(0xD6)
UDR2
(0xD5)
UBRR2H
(0xD4)
UBRR2L
(0xD3)
Reserved
-
-
(0xD2)
UCSR2C
UMSEL21
UMSEL20
(0xD1)
UCSR2B
RXCIE2
TXCIE2
(0xD0)
UCSR2A
RXC2
TXC2
(0xCF)
Reserved
-
-
USART2 I/O Data Register
-
-
-
-
222
USART2 Baud Rate Register High Byte
227
USART2 Baud Rate Register Low Byte
-
227
-
-
-
-
-
UPM21
UPM20
USBS2
UCSZ21
UCSZ20
UCPOL2
239
UDRIE2
RXEN2
TXEN2
UCSZ22
RXB82
TXB82
238
UDRE2
FE2
DOR2
UPE2
U2X2
MPCM2
238
-
-
-
-
-
-
-
-
-
(0xCE)
UDR1
(0xCD)
UBRR1H
USART1 I/O Data Register
(0xCC)
UBRR1L
(0xCB)
Reserved
-
-
(0xCA)
UCSR1C
UMSEL11
UMSEL10
(0xC9)
UCSR1B
RXCIE1
TXCIE1
(0xC8)
UCSR1A
RXC1
TXC1
(0xC7)
Reserved
-
-
-
-
-
-
222
USART1 Baud Rate Register High Byte
227
USART1 Baud Rate Register Low Byte
(0xC6)
UDR0
(0xC5)
UBRR0H
(0xC4)
UBRR0L
(0xC3)
Reserved
-
-
(0xC2)
UCSR0C
UMSEL01
UMSEL00
(0xC1)
UCSR0B
RXCIE0
TXCIE0
(0xC0)
UCSR0A
RXC0
TXC0
(0xBF)
Reserved
-
-
-
227
-
-
-
-
-
UPM11
UPM10
USBS1
UCSZ11
UCSZ10
UCPOL1
239
UDRIE1
RXEN1
TXEN1
UCSZ12
RXB81
TXB81
238
UDRE1
FE1
DOR1
UPE1
U2X1
MPCM1
238
-
-
-
-
-
-
USART0 I/O Data Register
-
222
USART0 Baud Rate Register High Byte
227
USART0 Baud Rate Register Low Byte
-
227
-
-
-
-
-
UPM01
UPM00
USBS0
UCSZ01
UCSZ00
UCPOL0
239
UDRIE0
RXEN0
TXEN0
UCSZ02
RXB80
TXB80
238
UDRE0
FE0
DOR0
UPE0
U2X0
MPCM0
238
-
-
-
-
-
-
411
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(0xBE)
Reserved
-
-
-
-
-
-
-
-
(0xBD)
TWAMR
TWAM6
TWAM5
TWAM4
TWAM3
TWAM2
TWAM1
TWAM0
-
269
(0xBC)
TWCR
TWINT
TWEA
TWSTA
TWSTO
TWWC
TWEN
-
TWIE
266
(0xBB)
TWDR
(0xBA)
TWAR
TWA6
TWA5
TWA4
TWA3
TWA2
TWA1
TWA0
TWGCE
269
(0xB9)
TWSR
TWS7
TWS6
TWS5
TWS4
TWS3
-
TWPS1
TWPS0
268
2-wire Serial Interface Data Register
Page
268
(0xB8)
TWBR
(0xB7)
Reserved
-
-
-
2-wire Serial Interface Bit Rate Register
-
-
-
-
-
266
(0xB6)
ASSR
-
EXCLK
AS2
TCN2UB
OCR2AUB
OCR2BUB
TCR2AUB
TCR2BUB
(0xB5)
Reserved
-
-
-
-
-
-
-
-
(0xB4)
OCR2B
Timer/Counter2 Output Compare Register B
191
(0xB3)
OCR2A
Timer/Counter2 Output Compare Register A
191
(0xB2)
TCNT2
Timer/Counter2 (8 Bit)
(0xB1)
TCCR2B
FOC2A
FOC2B
-
-
WGM22
CS22
CS21
CS20
190
(0xB0)
TCCR2A
COM2A1
COM2A0
COM2B1
COM2B0
-
-
WGM21
WGM20
191
(0xAF)
Reserved
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
184
191
(0xAE)
Reserved
(0xAD)
OCR4CH
Timer/Counter4 - Output Compare Register C High Byte
164
(0xAC)
OCR4CL
Timer/Counter4 - Output Compare Register C Low Byte
164
(0xAB)
OCR4BH
Timer/Counter4 - Output Compare Register B High Byte
164
(0xAA)
OCR4BL
Timer/Counter4 - Output Compare Register B Low Byte
164
(0xA9)
OCR4AH
Timer/Counter4 - Output Compare Register A High Byte
164
(0xA8)
OCR4AL
Timer/Counter4 - Output Compare Register A Low Byte
164
(0xA7)
ICR4H
Timer/Counter4 - Input Capture Register High Byte
165
(0xA6)
ICR4L
Timer/Counter4 - Input Capture Register Low Byte
165
(0xA5)
TCNT4H
Timer/Counter4 - Counter Register High Byte
163
(0xA4)
TCNT4L
Timer/Counter4 - Counter Register Low Byte
(0xA3)
Reserved
-
-
-
(0xA2)
TCCR4C
FOC4A
FOC4B
FOC4C
-
-
-
-
-
162
(0xA1)
TCCR4B
ICNC4
ICES4
-
WGM43
WGM42
CS42
CS41
CS40
160
(0xA0)
TCCR4A
COM4A1
COM4A0
COM4B1
COM4B0
COM4C1
COM4C0
WGM41
WGM40
158
(0x9F)
Reserved
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
163
-
-
-
(0x9E)
Reserved
(0x9D)
OCR3CH
Timer/Counter3 - Output Compare Register C High Byte
164
(0x9C)
OCR3CL
Timer/Counter3 - Output Compare Register C Low Byte
164
(0x9B)
OCR3BH
Timer/Counter3 - Output Compare Register B High Byte
164
(0x9A)
OCR3BL
Timer/Counter3 - Output Compare Register B Low Byte
164
(0x99)
OCR3AH
Timer/Counter3 - Output Compare Register A High Byte
163
(0x98)
OCR3AL
Timer/Counter3 - Output Compare Register A Low Byte
163
(0x97)
ICR3H
Timer/Counter3 - Input Capture Register High Byte
165
(0x96)
ICR3L
Timer/Counter3 - Input Capture Register Low Byte
165
(0x95)
TCNT3H
Timer/Counter3 - Counter Register High Byte
162
(0x94)
TCNT3L
Timer/Counter3 - Counter Register Low Byte
(0x93)
Reserved
-
-
-
-
-
162
-
-
-
(0x92)
TCCR3C
FOC3A
FOC3B
FOC3C
-
-
-
-
-
162
(0x91)
TCCR3B
ICNC3
ICES3
-
WGM33
WGM32
CS32
CS31
CS30
160
(0x90)
TCCR3A
COM3A1
COM3A0
COM3B1
COM3B0
COM3C1
COM3C0
WGM31
WGM30
158
(0x8F)
Reserved
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
(0x8E)
Reserved
(0x8D)
OCR1CH
Timer/Counter1 - Output Compare Register C High Byte
163
(0x8C)
OCR1CL
Timer/Counter1 - Output Compare Register C Low Byte
163
(0x8B)
OCR1BH
Timer/Counter1 - Output Compare Register B High Byte
163
(0x8A)
OCR1BL
Timer/Counter1 - Output Compare Register B Low Byte
163
(0x89)
OCR1AH
Timer/Counter1 - Output Compare Register A High Byte
163
(0x88)
OCR1AL
Timer/Counter1 - Output Compare Register A Low Byte
163
(0x87)
ICR1H
Timer/Counter1 - Input Capture Register High Byte
165
(0x86)
ICR1L
Timer/Counter1 - Input Capture Register Low Byte
165
(0x85)
TCNT1H
Timer/Counter1 - Counter Register High Byte
162
(0x84)
TCNT1L
Timer/Counter1 - Counter Register Low Byte
(0x83)
Reserved
-
-
-
-
-
162
-
-
-
(0x82)
TCCR1C
FOC1A
FOC1B
FOC1C
-
-
-
-
-
161
(0x81)
TCCR1B
ICNC1
ICES1
-
WGM13
WGM12
CS12
CS11
CS10
160
(0x80)
TCCR1A
COM1A1
COM1A0
COM1B1
COM1B0
COM1C1
COM1C0
WGM11
WGM10
158
(0x7F)
DIDR1
-
-
-
-
-
-
AIN1D
AIN0D
274
(0x7E)
DIDR0
ADC7D
ADC6D
ADC5D
ADC4D
ADC3D
ADC2D
ADC1D
ADC0D
295
(0x7D)
DIDR2
ADC15D
ADC14D
ADC13D
ADC12D
ADC11D
ADC10D
ADC9D
ADC8D
295
412
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(0x7C)
ADMUX
REFS1
REFS0
ADLAR
MUX4
MUX3
MUX2
MUX1
MUX0
Page
289
(0x7B)
ADCSRB
-
ACME
-
-
MUX5
ADTS2
ADTS1
ADTS0
272,290,,294
(0x7A)
ADCSRA
ADEN
ADSC
ADATE
ADIF
ADIE
ADPS2
ADPS1
ADPS0
292
(0x79)
ADCH
ADC Data Register High byte
(0x78)
ADCL
ADC Data Register Low byte
(0x77)
Reserved
(0x76)
(0x75)
294
294
-
-
-
-
-
-
-
-
Reserved
-
-
-
-
-
-
-
-
XMCRB
XMBK
-
-
-
-
XMM2
XMM1
XMM0
(0x74)
XMCRA
SRE
SRL2
SRL1
SRL0
SRW11
SRW10
SRW01
SRW00
37
(0x73)
TIMSK5
-
-
ICIE5
-
OCIE5C
OCIE5B
OCIE5A
TOIE5
166
(0x72)
TIMSK4
-
-
ICIE4
-
OCIE4C
OCIE4B
OCIE4A
TOIE4
166
(0x71)
TIMSK3
-
-
ICIE3
-
OCIE3C
OCIE3B
OCIE3A
TOIE3
166
(0x70)
TIMSK2
-
-
-
-
-
OCIE2B
OCIE2A
TOIE2
193
(0x6F)
TIMSK1
-
-
ICIE1
-
OCIE1C
OCIE1B
OCIE1A
TOIE1
166
(0x6E)
TIMSK0
-
-
-
-
-
OCIE0B
OCIE0A
TOIE0
134
(0x6D)
PCMSK2
PCINT23
PCINT22
PCINT21
PCINT20
PCINT19
PCINT18
PCINT17
PCINT16
116
(0x6C)
PCMSK1
PCINT15
PCINT14
PCINT13
PCINT12
PCINT11
PCINT10
PCINT9
PCINT8
116
(0x6B)
PCMSK0
PCINT7
PCINT6
PCINT5
PCINT4
PCINT3
PCINT2
PCINT1
PCINT0
117
(0x6A)
EICRB
ISC71
ISC70
ISC61
ISC60
ISC51
ISC50
ISC41
ISC40
114
(0x69)
EICRA
ISC31
ISC30
ISC21
ISC20
ISC11
ISC10
ISC01
ISC00
113
(0x68)
PCICR
-
-
-
-
-
PCIE2
PCIE1
PCIE0
115
(0x67)
Reserved
-
-
-
-
-
-
-
-
(0x66)
OSCCAL
(0x65)
PRR1
-
-
PRTIM5
PRTIM4
PRTIM3
PRUSART3
PRUSART2
PRUSART1
57
(0x64)
PRR0
PRTWI
PRTIM2
PRTIM0
-
PRTIM1
PRSPI
PRUSART0
PRADC
56
(0x63)
Reserved
-
-
-
-
-
-
-
-
(0x62)
Reserved
-
-
-
-
-
-
-
-
(0x61)
CLKPR
CLKPCE
-
-
-
CLKPS3
CLKPS2
CLKPS1
CLKPS0
50
(0x60)
WDTCSR
WDIF
WDIE
WDP3
WDCE
WDE
WDP2
WDP1
WDP0
67
0x3F (0x5F)
SREG
I
T
H
S
V
N
Z
C
14
0x3E (0x5E)
SPH
SP15
SP14
SP13
SP12
SP11
SP10
SP9
SP8
16
0x3D (0x5D)
SPL
SP7
SP6
SP5
SP4
SP3
SP2
SP1
SP0
16
0x3C (0x5C)
EIND
-
-
-
-
-
-
-
EIND0
17
0x3B (0x5B)
RAMPZ
-
-
-
-
-
-
RAMPZ1
RAMPZ0
17
0x3A (0x5A)
Reserved
-
-
-
-
-
-
-
-
0x39 (0x59)
Reserved
-
-
-
-
-
-
-
-
0x38 (0x58)
Reserved
-
-
-
-
-
-
-
-
0x37 (0x57)
SPMCSR
SPMIE
RWWSB
SIGRD
RWWSRE
BLBSET
PGWRT
PGERS
SPMEN
0x36 (0x56)
Reserved
-
-
-
-
-
-
-
-
0x35 (0x55)
MCUCR
JTD
-
-
PUD
-
-
IVSEL
IVCE
67,110,100,308
0x34 (0x54)
MCUSR
-
-
-
JTRF
WDRF
BORF
EXTRF
PORF
308
0x33 (0x53)
SMCR
-
-
-
-
SM2
SM1
SM0
SE
52
0x32 (0x52)
Reserved
-
-
-
-
-
-
-
-
0x31 (0x51)
OCDR
OCDR7
OCDR6
OCDR5
OCDR4
OCDR3
OCDR2
OCDR1
OCDR0
301
0x30 (0x50)
ACSR
ACD
ACBG
ACO
ACI
ACIE
ACIC
ACIS1
ACIS0
272
0x2F (0x4F)
Reserved
-
-
-
-
-
-
-
-
Oscillator Calibration Register
38
50
SPI Data Register
332
0x2E (0x4E)
SPDR
0x2D (0x4D)
SPSR
SPIF
WCOL
-
-
-
-
-
SPI2X
203
0x2C (0x4C)
SPCR
SPIE
SPE
DORD
MSTR
CPOL
CPHA
SPR1
SPR0
202
0x2B (0x4B)
GPIOR2
General Purpose I/O Register 2
0x2A (0x4A)
GPIOR1
General Purpose I/O Register 1
0x29 (0x49)
Reserved
0x28 (0x48)
OCR0B
Timer/Counter0 Output Compare Register B
133
0x27 (0x47)
OCR0A
Timer/Counter0 Output Compare Register A
133
0x26 (0x46)
TCNT0
Timer/Counter0 (8 Bit)
0x25 (0x45)
TCCR0B
FOC0A
FOC0B
-
-
WGM02
CS02
CS01
CS00
0x24 (0x44)
TCCR0A
COM0A1
COM0A0
COM0B1
COM0B0
-
-
WGM01
WGM00
129
0x23 (0x43)
GTCCR
TSM
-
-
-
-
-
PSRASY
PSRSYNC
170, 194
-
-
-
-
-
-
-
204
37
37
-
-
-
EEPROM Address Register High Byte
0x22 (0x42)
EEARH
EEARL
EEPROM Address Register Low Byte
0x20 (0x40)
EEDR
EEPROM Data Register
0x1F (0x3F)
EECR
0x1E (0x3E)
GPIOR0
0x1D (0x3D)
EIMSK
INT7
INT6
INT5
INT4
INT3
0x1C (0x3C)
EIFR
INTF7
INTF6
INTF5
INTF4
INTF3
INTF2
0x1B (0x3B)
PCIFR
-
-
-
-
-
PCIF2
-
EEPM1
EEPM0
-
133
0x21 (0x41)
-
-
EERIE
132
35
35
35
EEMPE
EEPE
EERE
35
INT2
INT1
INT0
115
INTF1
INTF0
115
PCIF1
PCIF0
116
General Purpose I/O Register 0
37
413
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Page
0x1A (0x3A)
TIFR5
-
-
ICF5
-
OCF5C
OCF5B
OCF5A
TOV5
166
0x19 (0x39)
TIFR4
-
-
ICF4
-
OCF4C
OCF4B
OCF4A
TOV4
167
0x18 (0x38)
TIFR3
-
-
ICF3
-
OCF3C
OCF3B
OCF3A
TOV3
167
0x17 (0x37)
TIFR2
-
-
-
-
-
OCF2B
OCF2A
TOV2
193
0x16 (0x36)
TIFR1
-
-
ICF1
-
OCF1C
OCF1B
OCF1A
TOV1
167
0x15 (0x35)
TIFR0
-
-
-
-
-
OCF0B
OCF0A
TOV0
134
0x14 (0x34)
PORTG
-
-
PORTG5
PORTG4
PORTG3
PORTG2
PORTG1
PORTG0
102
0x13 (0x33)
DDRG
-
-
DDG5
DDG4
DDG3
DDG2
DDG1
DDG0
102
0x12 (0x32)
PING
-
-
PING5
PING4
PING3
PING2
PING1
PING0
102
0x11 (0x31)
PORTF
PORTF7
PORTF6
PORTF5
PORTF4
PORTF3
PORTF2
PORTF1
PORTF0
101
0x10 (0x30)
DDRF
DDF7
DDF6
DDF5
DDF4
DDF3
DDF2
DDF1
DDF0
102
0x0F (0x2F)
PINF
PINF7
PINF6
PINF5
PINF4
PINF3
PINF2
PINF1
PINF0
102
0x0E (0x2E)
PORTE
PORTE7
PORTE6
PORTE5
PORTE4
PORTE3
PORTE2
PORTE1
PORTE0
101
0x0D (0x2D)
DDRE
DDE7
DDE6
DDE5
DDE4
DDE3
DDE2
DDE1
DDE0
101
0x0C (0x2C)
PINE
PINE7
PINE6
PINE5
PINE4
PINE3
PINE2
PINE1
PINE0
102
0x0B (0x2B)
PORTD
PORTD7
PORTD6
PORTD5
PORTD4
PORTD3
PORTD2
PORTD1
PORTD0
101
0x0A (0x2A)
DDRD
DDD7
DDD6
DDD5
DDD4
DDD3
DDD2
DDD1
DDD0
101
0x09 (0x29)
PIND
PIND7
PIND6
PIND5
PIND4
PIND3
PIND2
PIND1
PIND0
101
0x08 (0x28)
PORTC
PORTC7
PORTC6
PORTC5
PORTC4
PORTC3
PORTC2
PORTC1
PORTC0
101
0x07 (0x27)
DDRC
DDC7
DDC6
DDC5
DDC4
DDC3
DDC2
DDC1
DDC0
101
0x06 (0x26)
PINC
PINC7
PINC6
PINC5
PINC4
PINC3
PINC2
PINC1
PINC0
101
0x05 (0x25)
PORTB
PORTB7
PORTB6
PORTB5
PORTB4
PORTB3
PORTB2
PORTB1
PORTB0
100
0x04 (0x24)
DDRB
DDB7
DDB6
DDB5
DDB4
DDB3
DDB2
DDB1
DDB0
100
0x03 (0x23)
PINB
PINB7
PINB6
PINB5
PINB4
PINB3
PINB2
PINB1
PINB0
100
0x02 (0x22)
PORTA
PORTA7
PORTA6
PORTA5
PORTA4
PORTA3
PORTA2
PORTA1
PORTA0
100
0x01 (0x21)
DDRA
DDA7
DDA6
DDA5
DDA4
DDA3
DDA2
DDA1
DDA0
100
0x00 (0x20)
PINA
PINA7
PINA6
PINA5
PINA4
PINA3
PINA2
PINA1
PINA0
100
Notes:
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.
414
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
33. Instruction Set Summary
Mnemonics
Operands
Description
Operation
Flags
#Clocks
ARITHMETIC AND LOGIC INSTRUCTIONS
ADD
Rd, Rr
Add two Registers
Rd ← Rd + Rr
Z,C,N,V,H
1
ADC
Rd, Rr
Add with Carry two Registers
Rd ← Rd + Rr + C
Z,C,N,V,H
1
ADIW
Rdl,K
Add Immediate to Word
Rdh:Rdl ← Rdh:Rdl + K
Z,C,N,V,S
2
SUB
Rd, Rr
Subtract two Registers
Rd ← Rd - Rr
Z,C,N,V,H
1
SUBI
Rd, K
Subtract Constant from Register
Rd ← Rd - K
Z,C,N,V,H
1
SBC
Rd, Rr
Subtract with Carry two Registers
Rd ← Rd - Rr - C
Z,C,N,V,H
1
SBCI
Rd, K
Subtract with Carry Constant from Reg.
Rd ← Rd - K - C
Z,C,N,V,H
1
SBIW
Rdl,K
Subtract Immediate from Word
Rdh:Rdl ← Rdh:Rdl - K
Z,C,N,V,S
2
AND
Rd, Rr
Logical AND Registers
Rd ← Rd • Rr
Z,N,V
1
ANDI
Rd, K
Logical AND Register and Constant
Rd ← Rd • K
Z,N,V
1
OR
Rd, Rr
Logical OR Registers
Rd ← Rd v Rr
Z,N,V
1
ORI
Rd, K
Logical OR Register and Constant
Rd ← Rd v K
Z,N,V
1
EOR
Rd, Rr
Exclusive OR Registers
Rd ← Rd ⊕ Rr
Z,N,V
1
COM
Rd
One’s Complement
Rd ← 0xFF − Rd
Z,C,N,V
1
NEG
Rd
Two’s Complement
Rd ← 0x00 − Rd
Z,C,N,V,H
1
SBR
Rd,K
Set Bit(s) in Register
Rd ← Rd v K
Z,N,V
1
CBR
Rd,K
Clear Bit(s) in Register
Rd ← Rd • (0xFF - K)
Z,N,V
1
INC
Rd
Increment
Rd ← Rd + 1
Z,N,V
1
DEC
Rd
Decrement
Rd ← Rd − 1
Z,N,V
1
TST
Rd
Test for Zero or Minus
Rd ← Rd • Rd
Z,N,V
1
CLR
Rd
Clear Register
Rd ← Rd ⊕ Rd
Z,N,V
1
SER
Rd
Set Register
Rd ← 0xFF
None
1
MUL
Rd, Rr
Multiply Unsigned
R1:R0 ← Rd x Rr
Z,C
2
MULS
Rd, Rr
Multiply Signed
R1:R0 ← Rd x Rr
Z,C
2
MULSU
Rd, Rr
Multiply Signed with Unsigned
R1:R0 ← Rd x Rr
Z,C
2
FMUL
Rd, Rr
Fractional Multiply Unsigned
R1:R0 ← (Rd x Rr) <<
Z,C
2
FMULS
Rd, Rr
Fractional Multiply Signed
Z,C
2
FMULSU
Rd, Rr
Fractional Multiply Signed with Unsigned
Z,C
2
1
R1:R0 ← (Rd x Rr) << 1
R1:R0 ← (Rd x Rr) << 1
BRANCH INSTRUCTIONS
RJMP
k
Relative Jump
PC ← PC + k + 1
None
2
Indirect Jump to (Z)
None
2
None
2
None
3
4
Extended Indirect Jump to (Z)
PC ← Z
PC ←(EIND:Z)
JMP
k
Direct Jump
PC ← k
RCALL
k
IJMP
EIJMP
Relative Subroutine Call
PC ← PC + k + 1
None
ICALL
Indirect Call to (Z)
None
4
EICALL
Extended Indirect Call to (Z)
PC ← Z
PC ←(EIND:Z)
None
4
Direct Subroutine Call
PC ← k
None
5
RET
Subroutine Return
PC ← STACK
None
5
RETI
Interrupt Return
PC ← STACK
I
Compare, Skip if Equal
if (Rd = Rr) PC ← PC + 2 or 3
None
CALL
CPSE
k
Rd,Rr
5
1/2/3
CP
Rd,Rr
Compare
Rd − Rr
Z, N,V,C,H
1
CPC
Rd,Rr
Compare with Carry
Rd − Rr − C
Z, N,V,C,H
1
CPI
Rd,K
Compare Register with Immediate
Rd − K
Z, N,V,C,H
SBRC
Rr, b
Skip if Bit in Register Cleared
if (Rr(b)=0) PC ← PC + 2 or 3
None
1
1/2/3
SBRS
Rr, b
Skip if Bit in Register is Set
if (Rr(b)=1) PC ← PC + 2 or 3
None
1/2/3
SBIC
P, b
Skip if Bit in I/O Register Cleared
if (P(b)=0) PC ← PC + 2 or 3
None
1/2/3
1/2/3
SBIS
P, b
Skip if Bit in I/O Register is Set
if (P(b)=1) PC ← PC + 2 or 3
None
BRBS
s, k
Branch if Status Flag Set
if (SREG(s) = 1) then PC←PC+k + 1
None
1/2
BRBC
s, k
Branch if Status Flag Cleared
if (SREG(s) = 0) then PC←PC+k + 1
None
1/2
BREQ
k
Branch if Equal
if (Z = 1) then PC ← PC + k + 1
None
1/2
BRNE
k
Branch if Not Equal
if (Z = 0) then PC ← PC + k + 1
None
1/2
BRCS
k
Branch if Carry Set
if (C = 1) then PC ← PC + k + 1
None
1/2
BRCC
k
Branch if Carry Cleared
if (C = 0) then PC ← PC + k + 1
None
1/2
BRSH
k
Branch if Same or Higher
if (C = 0) then PC ← PC + k + 1
None
1/2
BRLO
k
Branch if Lower
if (C = 1) then PC ← PC + k + 1
None
1/2
BRMI
k
Branch if Minus
if (N = 1) then PC ← PC + k + 1
None
1/2
BRPL
k
Branch if Plus
if (N = 0) then PC ← PC + k + 1
None
1/2
1/2
BRGE
k
Branch if Greater or Equal, Signed
if (N ⊕ V= 0) then PC ← PC + k + 1
None
BRLT
k
Branch if Less Than Zero, Signed
if (N ⊕ V= 1) then PC ← PC + k + 1
None
1/2
BRHS
k
Branch if Half Carry Flag Set
if (H = 1) then PC ← PC + k + 1
None
1/2
1/2
BRHC
k
Branch if Half Carry Flag Cleared
if (H = 0) then PC ← PC + k + 1
None
BRTS
k
Branch if T Flag Set
if (T = 1) then PC ← PC + k + 1
None
1/2
BRTC
k
Branch if T Flag Cleared
if (T = 0) then PC ← PC + k + 1
None
1/2
415
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Mnemonics
Operands
Description
Operation
Flags
#Clocks
BRVS
k
Branch if Overflow Flag is Set
if (V = 1) then PC ← PC + k + 1
None
1/2
BRVC
k
Branch if Overflow Flag is Cleared
if (V = 0) then PC ← PC + k + 1
None
1/2
BRIE
k
Branch if Interrupt Enabled
if ( I = 1) then PC ← PC + k + 1
None
1/2
BRID
k
Branch if Interrupt Disabled
if ( I = 0) then PC ← PC + k + 1
None
1/2
BIT AND BIT-TEST INSTRUCTIONS
SBI
P,b
Set Bit in I/O Register
I/O(P,b) ← 1
None
2
CBI
P,b
Clear Bit in I/O Register
I/O(P,b) ← 0
None
2
LSL
Rd
Logical Shift Left
Rd(n+1) ← Rd(n), Rd(0) ← 0
Z,C,N,V
1
LSR
Rd
Logical Shift Right
Rd(n) ← Rd(n+1), Rd(7) ← 0
Z,C,N,V
1
ROL
Rd
Rotate Left Through Carry
Rd(0)←C,Rd(n+1)← Rd(n),C←Rd(7)
Z,C,N,V
1
ROR
Rd
Rotate Right Through Carry
Rd(7)←C,Rd(n)← Rd(n+1),C←Rd(0)
Z,C,N,V
1
ASR
Rd
Arithmetic Shift Right
Rd(n) ← Rd(n+1), n=0..6
Z,C,N,V
1
SWAP
Rd
Swap Nibbles
Rd(3..0)←Rd(7..4),Rd(7..4)←Rd(3..0)
None
1
BSET
s
Flag Set
SREG(s) ← 1
SREG(s)
1
BCLR
s
Flag Clear
SREG(s) ← 0
SREG(s)
1
BST
Rr, b
Bit Store from Register to T
T ← Rr(b)
T
1
BLD
Rd, b
Bit load from T to Register
Rd(b) ← T
None
1
SEC
Set Carry
C←1
C
1
CLC
Clear Carry
C←0
C
1
SEN
Set Negative Flag
N←1
N
1
CLN
Clear Negative Flag
N←0
N
1
SEZ
Set Zero Flag
Z←1
Z
1
CLZ
Clear Zero Flag
Z←0
Z
1
SEI
Global Interrupt Enable
I←1
I
1
CLI
Global Interrupt Disable
I←0
I
1
SES
Set Signed Test Flag
S←1
S
1
CLS
Clear Signed Test Flag
S←0
S
1
SEV
Set Twos Complement Overflow.
V←1
V
1
CLV
Clear Twos Complement Overflow
V←0
V
1
SET
Set T in SREG
T←1
T
1
CLT
Clear T in SREG
T←0
T
1
SEH
CLH
Set Half Carry Flag in SREG
Clear Half Carry Flag in SREG
H←1
H←0
H
H
1
1
None
1
DATA TRANSFER INSTRUCTIONS
MOV
Rd, Rr
Move Between Registers
MOVW
Rd, Rr
Copy Register Word
Rd ← Rr
Rd+1:Rd ← Rr+1:Rr
None
1
LDI
Rd, K
Load Immediate
Rd ← K
None
1
2
LD
Rd, X
Load Indirect
Rd ← (X)
None
LD
Rd, X+
Load Indirect and Post-Inc.
Rd ← (X), X ← X + 1
None
2
LD
Rd, - X
Load Indirect and Pre-Dec.
X ← X - 1, Rd ← (X)
None
2
LD
Rd, Y
Load Indirect
Rd ← (Y)
None
2
LD
Rd, Y+
Load Indirect and Post-Inc.
Rd ← (Y), Y ← Y + 1
None
2
2
LD
Rd, - Y
Load Indirect and Pre-Dec.
Y ← Y - 1, Rd ← (Y)
None
LDD
Rd,Y+q
Load Indirect with Displacement
Rd ← (Y + q)
None
2
LD
Rd, Z
Load Indirect
Rd ← (Z)
None
2
LD
Rd, Z+
Load Indirect and Post-Inc.
Rd ← (Z), Z ← Z+1
None
2
LD
Rd, -Z
Load Indirect and Pre-Dec.
Z ← Z - 1, Rd ← (Z)
None
2
2
LDD
Rd, Z+q
Load Indirect with Displacement
Rd ← (Z + q)
None
LDS
Rd, k
Load Direct from SRAM
Rd ← (k)
None
2
ST
X, Rr
Store Indirect
(X) ← Rr
None
2
ST
X+, Rr
Store Indirect and Post-Inc.
(X) ← Rr, X ← X + 1
None
2
ST
- X, Rr
Store Indirect and Pre-Dec.
X ← X - 1, (X) ← Rr
None
2
2
ST
Y, Rr
Store Indirect
(Y) ← Rr
None
ST
Y+, Rr
Store Indirect and Post-Inc.
(Y) ← Rr, Y ← Y + 1
None
2
ST
- Y, Rr
Store Indirect and Pre-Dec.
Y ← Y - 1, (Y) ← Rr
None
2
STD
Y+q,Rr
Store Indirect with Displacement
(Y + q) ← Rr
None
2
ST
Z, Rr
Store Indirect
(Z) ← Rr
None
2
ST
Z+, Rr
Store Indirect and Post-Inc.
(Z) ← Rr, Z ← Z + 1
None
2
ST
-Z, Rr
Store Indirect and Pre-Dec.
Z ← Z - 1, (Z) ← Rr
None
2
STD
Z+q,Rr
Store Indirect with Displacement
(Z + q) ← Rr
None
2
STS
k, Rr
Store Direct to SRAM
(k) ← Rr
None
2
Load Program Memory
R0 ← (Z)
None
3
Load Program Memory
Rd ← (Z)
None
3
LPM
LPM
Rd, Z
LPM
Rd, Z+
ELPM
ELPM
Rd, Z
Load Program Memory and Post-Inc
Rd ← (Z), Z ← Z+1
None
3
Extended Load Program Memory
R0 ← (RAMPZ:Z)
None
3
Extended Load Program Memory
Rd ← (RAMPZ:Z)
None
3
416
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Mnemonics
ELPM
Operands
Rd, Z+
SPM
Description
Operation
Flags
#Clocks
Extended Load Program Memory
Rd ← (RAMPZ:Z), RAMPZ:Z ←RAMPZ:Z+1
None
Store Program Memory
(Z) ← R1:R0
None
-
Rd ← P
None
1
3
IN
Rd, P
In Port
OUT
P, Rr
Out Port
P ← Rr
None
1
PUSH
Rr
Push Register on Stack
STACK ← Rr
None
2
POP
Rd
Pop Register from Stack
Rd ← STACK
None
2
None
1
MCU CONTROL INSTRUCTIONS
NOP
No Operation
SLEEP
Sleep
(see specific descr. for Sleep function)
None
1
WDR
BREAK
Watchdog Reset
Break
(see specific descr. for WDR/timer)
For On-chip Debug Only
None
None
1
N/A
Note:
EICALL and EIJMP do not exist in ATmega640/1280/1281.
ELPM does not exist in ATmega640.
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2549MS–AVR–09/10
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8. Ordering Information
8.1
ATmega640
Speed (MHz)(2)
Power Supply
Ordering Code
Package(1)(3)
Operation Range
8
1.8V - 5.5V
ATmega640V-8AU
ATmega640V-8CU
100A
100C1
Industrial (-40°C to 85°C)
16
2.7V - 5.5V
ATmega640-16AU
ATmega640-16CU
100A
100C1
Industrial (-40°C to 85°C)
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 “Speed Grades” on page 369.
3. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
Package Type
64A
64-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
64M2
64-pad, 9 × 9 × 1.0 mm Body, Quad Flat No-lead/Micro Lead Frame Package (QFN/MLF)
100A
100-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
100C1
100-ball, Chip Ball Grid Array (CBGA)
20
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
8.2
ATmega1281
Speed (MHz)(2)
Power Supply
8
16
Notes:
Ordering Code
Package(1)(3)
1.8V - 5.5V
ATmega1281V-8AU
ATmega1281V-8MU
64A
64M2
Industrial
(-40°C to 85°C)
2.7V - 5.5V
ATmega1281-16AU
ATmega1281-16MU
64A
64M2
Industrial
(-40°C to 85°C)
Operation Range
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 “Speed Grades” on page 369.
3. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
Package Type
64A
64-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
64M2
64-pad, 9 × 9 × 1.0 mm Body, Quad Flat No-lead/Micro Lead Frame Package (QFN/MLF)
100A
100-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
100C1
100-ball, Chip Ball Grid Array (CBGA)
21
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
8.3
ATmega1280
Speed (MHz)(2)
Power Supply
Ordering Code
Package(1)(3)
Operation Range
8
1.8V - 5.5V
ATmega1280V-8AU
ATmega1280V-8CU
100A
100C1
Industrial (-40°C to 85°C)
16
2.7V - 5.5V
ATmega1280-16AU
ATmega1280-16CU
100A
100C1
Industrial (-40°C to 85°C)
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 “Speed Grades” on page 369.
3. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
Package Type
64A
64-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
64M2
64-pad, 9 × 9 × 1.0 mm Body, Quad Flat No-lead/Micro Lead Frame Package (QFN/MLF)
100A
100-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
100C1
100-ball, Chip Ball Grid Array (CBGA)
22
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
8.4
ATmega2561
Speed (MHz)(2)
Power Supply
Ordering Code
Package(1)(3)
Operation Range
8
1.8V - 5.5V
ATmega2561V-8AU
ATmega2561V-8MU
64A
64M2
Industrial
(-40°C to 85°C)
16
4.5V - 5.5V
ATmega2561-16AU
ATmega2561-16MU
64A
64M2
Industrial
(-40°C to 85°C)
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 “Speed Grades” on page 369.
3. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
Package Type
64A
64-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
64M2
64-pad, 9 × 9 × 1.0 mm Body, Quad Flat No-lead/Micro Lead Frame Package (QFN/MLF)
100A
100-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
100C1
100-ball, Chip Ball Grid Array (CBGA)
23
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
8.5
ATmega2560
Speed (MHz)(2)
Power Supply
Ordering Code
Package(1)(3)
Operation Range
8
1.8V - 5.5V
ATmega2560V-8AU
ATmega2560V-8CU
100A
100C1
Industrial (-40°C to 85°C)
16
4.5V - 5.5V
ATmega2560-16AU
ATmega2560-16CU
100A
100C1
Industrial (-40°C to 85°C)
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 “Speed Grades” on page 369.
3. Pb-free packaging, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
Package Type
64A
64-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
64M2
64-pad, 9 × 9 × 1.0 mm Body, Quad Flat No-lead/Micro Lead Frame Package (QFN/MLF)
100A
100-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
100C1
100-ball, Chip Ball Grid Array (CBGA)
24
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
9. Packaging Information
9.1
100A
PIN 1
B
PIN 1 IDENTIFIER
E1
e
E
D1
D
C
0˚~7˚
A1
A2
A
L
COMMON DIMENSIONS
(Unit of Measure = mm)
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.
SYMBOL
MIN
NOM
MAX
A
–
–
1.20
A1
0.05
–
0.15
A2
0.95
1.00
1.05
D
15.75
16.00
16.25
D1
13.90
14.00
14.10
E
15.75
16.00
16.25
E1
13.90
14.00
14.10
B
0.17
–
0.27
C
0.09
–
0.20
L
0.45
–
0.75
e
NOTE
Note 2
Note 2
0.50 TYP
10/5/2001
R
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
25
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
9.2
100C1
0.12 Z
E
Marked A1 Identifier
SIDE VIEW
D
A
TOP VIEW
A1
Øb
e
A1 Corner
0.90 TYP
10
9
8
7
6
5
4
3
2
1
A
0.90 TYP
B
C
D
COMMON DIMENSIONS
(Unit of Measure = mm)
E
D1
F
e
SYMBOL
MIN
NOM
MAX
H
A
1.10
–
1.20
I
A1
0.30
0.35
0.40
D
8.90
9.00
9.10
E
8.90
9.00
9.10
G
J
E1
BOTTOM VIEW
D1
7.10
7.20
7.30
E1
7.10
7.20
7.30
Øb
0.35
0.40
0.45
e
NOTE
0.80 TYP
5/25/06
R
2325 Orchard Parkway
San Jose, CA 95131
TITLE
100C1, 100-ball, 9 x 9 x 1.2 mm Body, Ball Pitch 0.80 mm
Chip Array BGA Package (CBGA)
DRAWING NO.
100C1
REV.
A
26
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
9.3
64A
PIN 1
B
PIN 1 IDENTIFIER
E1
e
E
D1
D
C
0°~7°
A1
A2
A
L
COMMON DIMENSIONS
(Unit of Measure = mm)
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.
SYMBOL
MIN
NOM
MAX
A
–
–
1.20
A1
0.05
–
0.15
A2
0.95
1.00
1.05
D
15.75
16.00
16.25
D1
13.90
14.00
14.10
E
15.75
16.00
16.25
E1
13.90
14.00
14.10
B
0.30
–
0.45
C
0.09
–
0.20
L
0.45
–
0.75
e
NOTE
Note 2
Note 2
0.80 TYP
10/5/2001
R
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.
REV.
64A
B
27
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
9.4
64M2
D
Marked Pin# 1 ID
E
C
SEATING PLANE
A1
TOP VIEW
A
K
0.08 C
L
Pin #1 Corner
D2
1
2
3
SIDE VIEW
Pin #1
Triangle
Option A
COMMON DIMENSIONS
(Unit of Measure = mm)
E2
Option B
Pin #1
Chamfer
(C 0.30)
SYMBOL
MIN
NOM
MAX
A
0.80
0.90
1.00
–
0.02
0.05
0.18
0.25
0.30
A1
b
K
Option C
b
e
Pin #1
Notch
(0.20 R)
BOTTOM VIEW
D
8.90
9.00
9.10
D2
7.50
7.65
7.80
E
8.90
9.00
9.10
E2
7.50
7.65
7.80
e
NOTE
0.50 BSC
L
0.35
0.40
0.45
K
0.20
0.27
0.40
Note: 1. JEDEC Standard MO-220, (SAW Singulation) Fig. 1, VMMD.
2. Dimension and tolerance conform to ASMEY14.5M-1994.
5/25/06
R
TITLE
2325 Orchard Parkway
64M2, 64-pad, 9 x 9 x 1.0 mm Body, Lead Pitch 0.50 mm,
San Jose, CA 95131
7.65 mm Exposed Pad, Micro Lead Frame Package (MLF)
DRAWING NO.
64M2
REV.
D
28
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
10. Errata
10.1
ATmega640 rev. A
• Inaccurate ADC conversion in differential mode with 200× gain.
• High current consumption in sleep mode.
1.
Inaccurate ADC conversion in differential mode with 200× gain
With AVCC <3.6V, random conversions will be inaccurate. Typical absolute accuracy may
reach 64 LSB.
Problem Fix/Workaround
None.
2. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
10.2
ATmega1280 rev. A
• Inaccurate ADC conversion in differential mode with 200× gain.
• High current consumption in sleep mode.
1.
Inaccurate ADC conversion in differential mode with 200× gain
With AVCC <3.6V, random conversions will be inaccurate. Typical absolute accuracy may
reach 64 LSB.
Problem Fix/Workaround
None.
2. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
10.3
ATmega1281 rev. A
• Inaccurate ADC conversion in differential mode with 200× gain.
• High current consumption in sleep mode.
1.
Inaccurate ADC conversion in differential mode with 200× gain
With AVCC <3.6V, random conversions will be inaccurate. Typical absolute accuracy may
reach 64 LSB.
Problem Fix/Workaround
None.
29
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
2. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
10.4
ATmega2560 rev. E
No known errata.
10.5
ATmega2560 rev. D
Not sampled.
10.6
ATmega2560 rev. C
• High current consumption in sleep mode.
1. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
10.7
ATmega2560 rev. B
Not sampled.
10.8
ATmega2560 rev. A
•
•
•
•
•
•
1.
Non-Read-While-Write area of flash not functional.
Part does not work under 2.4 volts.
Incorrect ADC reading in differential mode.
Internal ADC reference has too low value.
IN/OUT instructions may be executed twice when Stack is in external RAM.
EEPROM read from application code does not work in Lock Bit Mode 3.
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 2.4 volts
The part does not execute code correctly below 2.4 volts.
30
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
Problem Fix/Workaround
Do not use the part at voltages below 2.4 volts.
3. Incorrect ADC reading in differential mode
The ADC has high noise in differential mode. It can give up to 7 LSB error.
Problem Fix/Workaround
Use only the 7 MSB of the result when using the ADC in differential mode.
4. Internal ADC reference has too low value
The internal ADC reference has a value lower than specified.
Problem Fix/Workaround
- Use AVCC or external reference.
- The actual value of the reference can be measured by applying a known voltage to the
ADC when using the internal reference. The result when doing later conversions can then be
calibrated.
5. IN/OUT instructions may be executed twice when Stack is in external RAM
If either an IN or an OUT instruction is executed directly before an interrupt occurs and the
stack pointer is located in external ram, the instruction will be executed twice. In some cases
this will cause a problem, for example:
- If reading SREG it will appear that the I-flag is cleared.
- If writing to the PIN registers, the port will toggle twice.
- If reading registers with interrupt flags, the flags will appear to be cleared.
Problem Fix/Workaround
There are two application work-arounds, where selecting one of them, will be omitting the
issue:
- Replace IN and OUT with LD/LDS/LDD and ST/STS/STD instructions.
- Use internal RAM for stack pointer.
6. EEPROM read from application code does not work in Lock Bit Mode 3
When the Memory Lock Bits LB2 and LB1 are programmed to mode 3, EEPROM read does
not work from the application code.
Problem Fix/Workaround
Do not set Lock Bit Protection Mode 3 when the application code needs to read from
EEPROM.
10.9
ATmega2561 rev. E
No known errata.
10.10 ATmega2561 rev. D
Not sampled.
31
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
10.11 ATmega2561 rev. C
• High current consumption in sleep mode.
1. High current consumption in sleep mode
If a pending interrupt cannot wake the part up from the selected sleep mode, the current
consumption will increase during sleep when executing the SLEEP instruction directly after
a SEI instruction.
Problem Fix/Workaround
Before entering sleep, interrupts not used to wake the part from the sleep mode should be
disabled.
10.12 ATmega2561 rev. B
Not sampled.
10.13 ATmega2561 rev. A
•
•
•
•
•
•
1.
Non-Read-While-Write area of flash not functional.
Part does not work under 2.4 Volts.
Incorrect ADC reading in differential mode.
Internal ADC reference has too low value.
IN/OUT instructions may be executed twice when Stack is in external RAM.
EEPROM read from application code does not work in Lock Bit Mode 3.
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 2.4 volts
The part does not execute code correctly below 2.4 volts.
Problem Fix/Workaround
Do not use the part at voltages below 2.4 volts.
3. Incorrect ADC reading in differential mode
The ADC has high noise in differential mode. It can give up to 7 LSB error.
Problem Fix/Workaround
Use only the 7 MSB of the result when using the ADC in differential mode.
4. Internal ADC reference has too low value
The internal ADC reference has a value lower than specified.
Problem Fix/Workaround
- Use AVCC or external reference.
32
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
- The actual value of the reference can be measured by applying a known voltage to the
ADC when using the internal reference. The result when doing later conversions can then be
calibrated.
5. IN/OUT instructions may be executed twice when Stack is in external RAM
If either an IN or an OUT instruction is executed directly before an interrupt occurs and the
stack pointer is located in external ram, the instruction will be executed twice. In some cases
this will cause a problem, for example:
- If reading SREG it will appear that the I-flag is cleared.
- If writing to the PIN registers, the port will toggle twice.
- If reading registers with interrupt flags, the flags will appear to be cleared.
Problem Fix/Workaround
There are two application workarounds, where selecting one of them, will be omitting the
issue:
- Replace IN and OUT with LD/LDS/LDD and ST/STS/STD instructions.
- Use internal RAM for stack pointer.
6. EEPROM read from application code does not work in Lock Bit Mode 3
When the Memory Lock Bits LB2 and LB1 are programmed to mode 3, EEPROM read does
not work from the application code.
Problem Fix/Workaround
Do not set Lock Bit Protection Mode 3 when the application code needs to read from
EEPROM.
33
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
11. Datasheet Revision History
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.
11.1
Rev. 2549M-09/10
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
11.2
Updated typos in Figure 25-9 on page 285 and in Figure 25-10 on page
285.
Note is added below Table 1-1 on page 3.
The values for “typical characteristics” in Table 30-7 on page 376 and
Table 30-8 on page 377, has been rounded.
Units for tRST and tBOD in Table 30-3 on page 372 have been changed
from “ns” to “µs”.
The figure text for Table 30-2 on page 371 has been changed.
Text in first column in Table 29-3 on page 336 has been changed from
“Fuse Low Byte” to “Extended Fuse Byte”.
The text in “Power Reduction Register” on page 54 has been changed.
The value of the inductor in Figure 25-9 on page 285 and Figure 25-10 on
page 285 has been changed into 10 µH.
“Port A” has been changed into “Port K” in the first paragraph of “Features” on page 275.
Minimum wait delay for tWD_EEPROM in Table 29-16 on page 351 has
been changed from 9.0 ms to 3.6 ms
Dimension A3 is added in “64M2” on page 28.
Several cross-references are corrected.
“COM0A1:0” on page 130 is corrected to “COM0B1:0”.
Corrected some Figure and Table numbering.
Updated Section 9.6 “Low Frequency Crystal Oscillator” on page 45.
Rev. 2549L-08/07
1.
2.
3.
4.
5.
6.
7.
8.
9.
Updated note in Table 9-11 on page 47.
Updated Table 9-3 on page 43, Table 9-5 on page 44, Table 9-9 on page 47.
Updated typos in “DC Characteristics” on page 367
Updated “Clock Characteristics” on page 371
Updated “External Clock Drive” on page 371.
Added “System and Reset Characteristics” on page 372.
Updated “SPI Timing Characteristics” on page 374.
Updated “ADC Characteristics – Preliminary Data” on page 376.
Updated ordering code in “ATmega640” on page 20.
34
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
11.3
Rev. 2549K-01/07
1.
2.
3.
4.
5.
6:
7.
8.
9.
10.
11.4
Rev. 2549J-09/06
1.
2.
3.
4.
5.
6.
11.5
Updated “” on page 46.
Updated code example in “Moving Interrupts Between Application and
Boot Section” on page 109.
Updated “Timer/Counter Prescaler” on page 186.
Updated “Device Identification Register” on page 303.
Updated “Signature Bytes” on page 338.
Updated “Instruction Set Summary” on page 415.
Rev. 2549I-07/06
1.
2.
3.
11.6
Updated Table 1-1 on page 3.
Updated “Pin Descriptions” on page 7.
Updated “Stack Pointer” on page 16.
Updated “Bit 1 – EEPE: EEPROM Programming Enable” on page 36.
Updated Assembly code example in “Thus, when the BOD is not enabled,
after setting the ACBG bit or enabling the ADC, the user must always
allow the reference to start up before the output from the Analog Comparator or ADC is used. To reduce power consumption in Power-down mode,
the user can avoid the three conditions above to ensure that the reference
is turned off before entering Power-down mode.” on page 63.
Updated “EIMSK – External Interrupt Mask Register” on page 115.
Updated Bit description in “PCIFR – Pin Change Interrupt Flag Register”
on page 116.
Updated code example in “USART Initialization” on page 210.
Updated Figure 25-8 on page 284.
Updated “DC Characteristics” on page 367.
Added “Data Retention” on page 11.
Updated Table 15-3 on page 129, Table 15-6 on page 130, Table 15-8 on
page 131, Table 16-2 on page 148, Table 16-4 on page 159, Table 16-5 on
page 160, Table 19-3 on page 187, Table 19-6 on page 188 and Table 19-8
on page 189.
Updated “Fast PWM Mode” on page 150.
Rev. 2549H-06/06
1.
2.
3.
Updated “” on page 46.
Updated “OSCCAL – Oscillator Calibration Register” on page 50.
Added Table 30-1 on page 371.
35
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
11.7
Rev. 2549G-06/06
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.8
Rev. 2549F-04/06
1.
2.
3.
4.
11.9
Updated “Features” on page 1.
Added Figure 1-2 on page 3, Table 1-1 on page 3.
Updated “” on page 46.
Updated “Power Management and Sleep Modes” on page 52.
Updated note for Table 11-1 on page 68.
Updated Figure 25-9 on page 285 and Figure 25-10 on page 285.
Updated “Setting the Boot Loader Lock Bits by SPM” on page 324.
Updated “Ordering Information” on page 20.
Added Package information “100C1” on page 26.
Updated “Errata” on page 29.
Updated Figure 8-3 on page 31, Figure 8-4 on page 31 and Figure 8-5 on
page 32.
Updated Table 19-2 on page 187 and Table 19-3 on page 187.
Updated Features in “ADC – Analog to Digital Converter” on page 275.
Updated “Fuse Bits” on page 336.
Rev. 2549E-04/06
1.
2.
3.
4.
5.
5.
6.
Updated “Features” on page 1.
Updated Table 12-1 on page 62.
Updated note for Table 12-1 on page 62.
Updated “Bit 6 – ACBG: Analog Comparator Bandgap Select” on page
273.
Updated “Prescaling and Conversion Timing” on page 278.
Updated “Maximum speed vs. VCC” on page 373.
Updated “Ordering Information” on page 20.
11.10 Rev. 2549D-12/05
1.
2.
3.
4.
5.
6.
7.
Advanced Information Status changed to Preliminary.
Changed number of I/O Ports from 51 to 54.
Updatet typos in “TCCR0A – Timer/Counter Control Register A” on page
129.
Updated Features in “ADC – Analog to Digital Converter” on page 275.
Updated Operation in“ADC – Analog to Digital Converter” on page 275
Updated Stabilizing Time in “Changing Channel or Reference Selection”
on page 282.
Updated Figure 25-1 on page 276, Figure 25-9 on page 285, Figure 25-10
on page 285.
36
2549MS–AVR–09/10
ATmega640/1280/1281/2560/2561
8.
9.
10.
11.
12.
13.
14.
Updated Text in “ADCSRB – ADC Control and Status Register B” on page
290.
Updated Note for Table 4 on page 43, Table 12-15 on page 86, Table 25-3
on page 289 and Table 25-6 on page 295.
Updated Table 30-7 on page 376 and Table 30-8 on page 377.
Updated “Filling the Temporary Buffer (Page Loading)” on page 323.
Updated “Typical Characteristics” on page 384.
Updated “Packaging Information” on page 25.
Updated “Errata” on page 29.
11.11 Rev. 2549C-09/05
1.
2.
3.
4.
5.
6.
7.
8.
Updated Speed Grade in section “Features” on page 1.
Added “Resources” on page 11.
Updated “SPI – Serial Peripheral Interface” on page 195. In Slave mode,
low and high period SPI clock must be larger than 2 CPU cycles.
Updated “Bit Rate Generator Unit” on page 247.
Updated “Maximum speed vs. VCC” on page 373.
Updated “Ordering Information” on page 20.
Updated “Packaging Information” on page 25. Package 64M1 replaced by
64M2.
Updated “Errata” on page 29.
11.12 Rev. 2549B-05/05
1.
2.
3.
4.
JTAG ID/Signature for ATmega640 updated: 0x9608.
Updated Table 12-7 on page 81.
Updated “Serial Programming Instruction set” on page 352.
Updated “Errata” on page 29.
11.13 Rev. 2549A-03/05
1.
Initial version.
37
2549MS–AVR–09/10
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2549MS–AVR–09/10