ATMEGA649 [ATMEL]

8-bit Microcontroller with In-System Programmable Flash; 8 -bit微控制器在系统内可编程Flash
ATMEGA649
型号: ATMEGA649
厂家: ATMEL    ATMEL
描述:

8-bit Microcontroller with In-System Programmable Flash
8 -bit微控制器在系统内可编程Flash

微控制器
文件: 总28页 (文件大小:330K)
中文:  中文翻译
下载:  下载PDF数据表文档文件
Features  
High Performance, Low Power AVR® 8-Bit Microcontroller  
Advanced RISC Architecture  
– 130 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  
– In-System Self-Programmable Flash, Endurance: 10,000 Write/Erase Cycles  
32K bytes (ATmega329/ATmega3290)  
8-bit  
64K bytes (ATmega649/ATmega6490)  
– Optional Boot Code Section with Independent Lock Bits  
In-System Programming by On-chip Boot Program  
True Read-While-Write Operation  
– EEPROM, Endurance: 100,000 Write/Erase Cycles  
1K bytes (ATmega329/ATmega3290)  
Microcontroller  
with In-System  
Programmable  
Flash  
2K bytes (ATmega649/ATmega6490)  
– Internal SRAM  
2K bytes (ATmega329/ATmega3290)  
4K bytes (ATmega649/ATmega6490)  
– 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  
ATmega329/V  
ATmega3290/V  
ATmega649/V  
ATmega6490/V  
– 4 x 25 Segment LCD Driver (ATmega329/ATmega649)  
– 4 x 40 Segment LCD Driver (ATmega3290/ATmega6490)  
– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode  
– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture  
Mode  
– Real Time Counter with Separate Oscillator  
– Four PWM Channels  
– 8-channel, 10-bit ADC  
– Programmable Serial USART  
– Master/Slave SPI Serial Interface  
– Universal Serial Interface with Start Condition Detector  
– Programmable Watchdog Timer with Separate On-chip Oscillator  
– On-chip Analog Comparator  
Preliminary  
Summary  
– 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  
– Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and  
Standby  
I/O and Packages  
– 53/68 Programmable I/O Lines  
– 64-lead TQFP, 64-pad QFN/MLF, and 100-lead TQFP  
Speed Grade:  
ATmega329V/ATmega3290V/ATmega649V/ATmega6490V:  
0 - 4 MHz @ 1.8 - 5.5V, 0 - 8 MHz @ 2.7 - 5.5V  
ATmega329/3290/649/6490:  
0 - 8 MHz @ 2.7 - 5.5V, 0 - 16 MHz @ 4.5 - 5.5V  
Temperature range:  
– -40°C to 85°C Industrial  
2552HS–AVR–11/06  
Features (Continued)  
Ultra-Low Power Consumption  
– Active Mode:  
1 MHz, 1.8V: 350 µA  
32 kHz, 1.8V: 20 µA (including Oscillator)  
32 kHz, 1.8V: 40 µA (including Oscillator and LCD)  
– Power-down Mode:  
100 nA at 1.8V  
Pin Configurations  
Figure 1. Pinout ATmega3290/6490  
TQFP  
1
75  
74  
73  
72  
71  
70  
69  
68  
67  
66  
65  
64  
63  
62  
61  
60  
59  
58  
57  
56  
55  
54  
53  
52  
51  
LCDCAP  
(RXD/PCINT0) PE0  
(TXD/PCINT1) PE1  
(XCK/AIN0/PCINT2) PE2  
(AIN1/PCINT3) PE3  
(USCK/SCL/PCINT4) PE4  
(DI/SDA/PCINT5) PE5  
(DO/PCINT6) PE6  
(CLKO/PCINT7) PE7  
VCC  
PA3 (COM3)  
PA4 (SEG0)  
PA5 (SEG1)  
PA6 (SEG2)  
PA7 (SEG3)  
PG2 (SEG4)  
PC7 (SEG5)  
PC6 (SEG6)  
DNC  
2
INDEX CORNER  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
PH3 (PCINT19/SEG7)  
PH2 (PCINT18/SEG8)  
PH1 (PCINT17/SEG9)  
PH0 (PCINT16/SEG10)  
DNC  
GND  
DNC  
(PCINT24/SEG35) PJ0  
(PCINT25/SEG34) PJ1  
DNC  
ATmega3290/6490  
DNC  
DNC  
DNC  
DNC  
DNC  
DNC  
PC5 (SEG11)  
PC4 (SEG12)  
PC3 (SEG13)  
PC2 (SEG14)  
PC1 (SEG15)  
PC0 (SEG16)  
PG1 (SEG17)  
PG0 (SEG18)  
(SS/PCINT8) PB0  
(SCK/PCINT9) PB1  
(MOSI/PCINT10) PB2  
(MISO/PCINT11) PB3  
(OC0A/PCINT12) PB4  
(OC1A/PCINT13) PB5  
(OC1B/PCINT14) PB6  
2
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Figure 2. Pinout ATmega329/649  
LCDCAP  
(RXD/PCINT0) PE0  
(TXD/PCINT1) PE1  
1
2
3
PA3 (COM3)  
PA4 (SEG0)  
PA5 (SEG1)  
PA6 (SEG2)  
48  
47  
46  
INDEX CORNER  
(XCK/AIN0/PCINT2) PE2  
4
45  
(AIN1/PCINT3) PE3  
5
6
PA7 (SEG3)  
PG2 (SEG4)  
PC7 (SEG5)  
PC6 (SEG6)  
PC5 (SEG7)  
44  
43  
(USCK/SCL/PCINT4) PE4  
(DI/SDA/PCINT5) PE5  
(DO/PCINT6) PE6  
7
8
9
42  
41  
40  
ATmega329/649  
(CLKO/PCINT7) PE7  
(SS/PCINT8) PB0 10  
(SCK/PCINT9) PB1 11  
(MOSI/PCINT10) PB2 12  
(MISO/PCINT11) PB3 13  
39 PC4 (SEG8)  
PC3 (SEG9)  
PC2 (SEG10)  
PC1 (SEG11)  
PC0 (SEG12)  
38  
37  
36  
(OC0A/PCINT12) PB4 14  
(OC1A/PCINT13) PB5 15  
(OC1B/PCINT14) PB6 16  
35  
34  
33  
PG1 (SEG13)  
PG0 (SEG14)  
Note:  
The large center pad underneath the QFN/MLF packages is made of metal and internally  
connected to GND. It should be soldered or glued to the board to ensure good mechani-  
cal 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 characteriza-  
tion of other AVR microcontrollers manufactured on the same process technology. Min  
and Max values will be available after the device is characterized.  
3
2552HS–AVR–11/06  
Overview  
The ATmega329/3290/649/6490 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architec-  
ture. By executing powerful instructions in a single clock cycle, the ATmega329/3290/649/6490 achieves throughputs  
approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.  
Block Diagram  
Figure 3. Block Diagram  
PF0 - PF7  
PA0 - PA7  
PC0 - PC7  
GND  
VCC  
PORTA DRIVERS  
PORTF DRIVERS  
PORTC DRIVERS  
DATA REGISTER  
PORTF  
DATA DIR.  
REG. PORTF  
DATA REGISTER  
PORTA  
DATA DIR.  
REG. PORTA  
DATA REGISTER  
PORTC  
DATA DIR.  
REG. PORTC  
8-BIT DATA BUS  
AVCC  
CALIB. OSC  
AGND  
AREF  
ADC  
INTERNAL  
OSCILLATOR  
OSCILLATOR  
PROGRAM  
COUNTER  
STACK  
POINTER  
WATCHDOG  
TIMER  
JTAG TAP  
TIMING AND  
CONTROL  
LCD  
CONTROLLER/  
DRIVER  
PROGRAM  
FLASH  
MCU CONTROL  
REGISTER  
SRAM  
ON-CHIP DEBUG  
BOUNDARY-  
SCAN  
INSTRUCTION  
REGISTER  
TIMER/  
COUNTERS  
GENERAL  
PURPOSE  
REGISTERS  
X
Y
Z
PROGRAMMING  
LOGIC  
INSTRUCTION  
DECODER  
INTERRUPT  
UNIT  
CONTROL  
LINES  
ALU  
EEPROM  
STATUS  
REGISTER  
AVR CPU  
UNIVERSAL  
SERIAL INTERFACE  
SPI  
USART  
DATA REGISTER  
PORTE  
DATA DIR.  
REG. PORTE  
DATA REGISTER  
PORTB  
DATA DIR.  
REG. PORTB  
DATA REGISTER  
PORTD  
DATA DIR.  
REG. PORTD  
DATA REG. DATA DIR.  
PORTG  
REG. PORTG  
PORTB DRIVERS  
PORTD DRIVERS  
PORTG DRIVERS  
PORTE DRIVERS  
PE0 - PE7  
PB0 - PB7  
PD0 - PD7  
PG0 - PG4  
4
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
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 ATmega329/3290/649/6490 provides the following features: 32/64K bytes of In-  
System Programmable Flash with Read-While-Write capabilities, 1/2K bytes EEPROM,  
2/4K byte SRAM, 54/69 general purpose I/O lines, 32 general purpose working regis-  
ters, a JTAG interface for Boundary-scan, On-chip Debugging support and  
programming, a complete On-chip LCD controller with internal contrast control, three  
flexible Timer/Counters with compare modes, internal and external interrupts, a serial  
programmable USART, Universal Serial Interface with Start Condition Detector, an 8-  
channel, 10-bit ADC, a programmable Watchdog Timer with internal Oscillator, an SPI  
serial port, and five software selectable power saving modes. The Idle mode stops the  
CPU while allowing the SRAM, Timer/Counters, SPI port, and interrupt system to con-  
tinue 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 and the LCD controller continues to run,  
allowing the user to maintain a timer base and operate the LCD display while the rest of  
the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O mod-  
ules except asynchronous timer, LCD controller 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.  
The device is manufactured using Atmel’s high density non-volatile memory technology.  
The On-chip In-System re-Programmable (ISP) Flash allows the program memory to be  
reprogrammed In-System through an SPI serial interface, by a conventional non-volatile  
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 Applica-  
tion 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 ATmega329/3290/649/6490 is a powerful microcontroller that provides a  
highly flexible and cost effective solution to many embedded control applications.  
The ATmega329/3290/649/6490 AVR is supported with a full suite of program and sys-  
tem development tools including: C Compilers, Macro Assemblers, Program  
Debugger/Simulators, In-Circuit Emulators, and Evaluation kits.  
5
2552HS–AVR–11/06  
Comparison between  
ATmega329,  
ATmega3290,  
The ATmega329, ATmega3290, ATmega649, and ATmega6490 differs only in memory  
sizes, pin count and pinout. Table 1 on page 6 summarizes the different configurations  
for the four devices.  
ATmega649 and  
ATmega6490  
Table 1. Configuration Summary  
LCD  
Segments  
General Purpose  
I/O Pins  
Device  
Flash  
EEPROM  
1K bytes  
1K bytes  
2K bytes  
2K bytes  
RAM  
ATmega329  
32K bytes  
2K bytes  
2K bytes  
4K bytes  
4K bytes  
4 x 25  
4 x 40  
4 x 25  
4 x 40  
54  
69  
54  
69  
ATmega3290 32K bytes  
ATmega649 64K bytes  
ATmega6490 64K bytes  
Pin Descriptions  
VCC  
The following section describes the I/O-pin special functions.  
Digital supply voltage.  
Ground.  
GND  
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 special features of the  
ATmega329/3290/649/6490 as listed on page 67.  
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  
ATmega329/3290/649/6490 as listed on page 68.  
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 features of the ATmega329/3290/649/6490  
as listed on page 71.  
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.  
6
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Port D also serves the functions of various special features of the  
ATmega329/3290/649/6490 as listed on page 73.  
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  
ATmega329/3290/649/6490 as listed on page 75.  
Port F (PF7..PF0)  
Port F serves as the 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 resis-  
tors 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 H (PH7..PH0)  
Port J (PJ6..PJ0)  
RESET  
Port G is a 6-bit bi-directional 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  
ATmega329/3290/649/6490 as listed on page 75.  
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 ATmega3290/6490 as  
listed on page 75.  
Port J is a 7-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 ATmega3290/6490 as  
listed on page 75.  
Reset input. A low level on this pin for longer than the minimum pulse length will gener-  
ate a reset, even if the clock is not running. The minimum pulse length is given in Table  
16 on page 41. Shorter pulses are not guaranteed to generate a reset.  
XTAL1  
Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.  
7
2552HS–AVR–11/06  
XTAL2  
AVCC  
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 con-  
nected to VCC through a low-pass filter.  
AREF  
This is the analog reference pin for the A/D Converter.  
LCDCAP  
An external capacitor (typical > 470 nF) must be connected to the LCDCAP pin as  
shown in Figure 99. This capacitor acts as a reservoir for LCD power (VLCD). A large  
capacitance reduces ripple on VLCD but increases the time until VLCD reaches its target  
value.  
Resources  
A comprehensive set of development tools, application notes and datasheets are avail-  
able for download on http://www.atmel.com/avr.  
8
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Register Summary  
Note:  
Registers with bold type only available in ATmega3290/6490.  
Address  
Name  
LCDDR19  
LCDDR18  
LCDDR17  
LCDDR16  
LCDDR15  
LCDDR14  
LCDDR13  
LCDDR12  
LCDDR11  
LCDDR10  
LCDDR09  
LCDDR08  
LCDDR07  
LCDDR06  
LCDDR05  
LCDDR04  
LCDDR03  
LCDDR02  
LCDDR01  
LCDDR00  
Reserved  
Reserved  
Reserved  
Reserved  
LCDCCR  
LCDFRR  
LCDCRB  
LCDCRA  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
PORTJ  
Bit 7  
SEG339  
Bit 6  
SEG338  
Bit 5  
SEG337  
Bit 4  
SEG336  
Bit 3  
SEG335  
Bit 2  
SEG334  
Bit 1  
SEG333  
Bit 0  
SEG332  
Page  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
234  
(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)  
SEG331  
SEG330  
SEG329  
SEG328  
SEG327  
SEG326  
SEG325  
SEG324  
SEG323  
SEG322  
SEG321  
SEG320  
SEG319  
SEG318  
SEG317  
SEG316  
SEG315  
SEG314  
SEG313  
SEG312  
SEG311  
SEG310  
SEG309  
SEG308  
SEG307  
SEG306  
SEG305  
SEG304  
SEG303  
SEG302  
SEG301  
SEG300  
SEG239  
SEG238  
SEG237  
SEG236  
SEG235  
SEG234  
SEG233  
SEG232  
SEG231  
SEG230  
SEG229  
SEG228  
SEG227  
SEG226  
SEG225  
SEG224  
SEG223  
SEG222  
SEG221  
SEG220  
SEG219  
SEG218  
SEG217  
SEG216  
SEG215  
SEG214  
SEG213  
SEG212  
SEG211  
SEG210  
SEG209  
SEG208  
SEG207  
SEG206  
SEG205  
SEG204  
SEG203  
SEG202  
SEG201  
SEG200  
SEG139  
SEG138  
SEG137  
SEG136  
SEG135  
SEG134  
SEG133  
SEG132  
SEG131  
SEG130  
SEG129  
SEG128  
SEG127  
SEG126  
SEG125  
SEG124  
SEG123  
SEG122  
SEG121  
SEG120  
SEG119  
SEG118  
SEG117  
SEG116  
SEG115  
SEG114  
SEG113  
SEG112  
SEG111  
SEG110  
SEG109  
SEG108  
SEG107  
SEG106  
SEG105  
SEG104  
SEG103  
SEG102  
SEG101  
SEG100  
SEG039  
SEG038  
SEG037  
SEG036  
SEG035  
SEG034  
SEG033  
SEG032  
SEG031  
SEG030  
SEG029  
SEG028  
SEG027  
SEG026  
SEG025  
SEG024  
SEG023  
SEG022  
SEG021  
SEG020  
SEG019  
SEG018  
SEG017  
SEG016  
SEG015  
SEG014  
SEG013  
SEG012  
SEG011  
SEG010  
SEG009  
SEG008  
SEG007  
SEG006  
SEG005  
SEG004  
SEG003  
SEG002  
SEG001  
SEG000  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
LCDDC2  
LCDDC1  
LCDDC0  
-
LCDCC3  
LCDCC2  
LCDCC1  
LCDCC0  
233  
231  
229  
229  
-
LCDPS2  
LCDPS1  
LCDPS0  
-
LCDCD2  
LCDCD1  
LCDCD0  
LCDCS  
LCD2B  
LCDMUX1  
LCDMUX0  
LCDPM3  
LCDPM2  
LCDPM1  
LCDPM0  
LCDEN  
LCDAB  
-
LCDIF  
LCDIE  
-
-
LCDBL  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PORTJ6  
PORTJ5  
PORTJ4  
PORTJ3  
PORTJ2  
PORTJ1  
PORTJ0  
88  
88  
88  
88  
88  
88  
DDRJ  
-
DDJ6  
DDJ5  
DDJ4  
DDJ3  
DDJ2  
DDJ1  
DDJ0  
PINJ  
-
PINJ6  
PINJ5  
PINJ4  
PINJ3  
PINJ2  
PINJ1  
PINJ0  
PORTH  
PORTH7  
PORTH6  
PORTH5  
PORTH4  
PORTH3  
PORTH2  
PORTH1  
PORTH0  
DDRH  
DDH7  
DDH6  
DDH5  
DDH4  
DDH3  
DDH2  
DDH1  
DDH0  
PINH  
PINH7  
PINH6  
PINH5  
PINH4  
PINH3  
PINH2  
PINH1  
PINH0  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
UDR0  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
USART0 Data Register  
179  
182  
182  
UBRR0H  
UBRR0L  
Reserved  
USART0 Baud Rate Register High  
USART0 Baud Rate Register Low  
-
-
-
-
-
-
-
-
9
2552HS–AVR–11/06  
Address  
Name  
UCSR0C  
UCSR0B  
UCSR0A  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
USIDR  
Bit 7  
-
Bit 6  
UMSEL0  
Bit 5  
UPM01  
Bit 4  
UPM00  
Bit 3  
USBS0  
Bit 2  
UCSZ01  
Bit 1  
UCSZ00  
Bit 0  
UCPOL0  
Page  
181  
(0xC2)  
(0xC1)  
(0xC0)  
(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)  
RXCIE0  
TXCIE0  
UDRIE0  
RXEN0  
TXEN0  
UCSZ02  
RXB80  
TXB80  
180  
RXC0  
TXC0  
UDRE0  
FE0  
DOR0  
UPE0  
U2X0  
MPCM0  
179  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
USI Data Register  
194  
195  
196  
USISR  
USISIF  
USIOIF  
USIPF  
USIDC  
USICNT3  
USICNT2  
USICNT1  
USICNT0  
USICR  
USISIE  
USIOIE  
USIWM1  
USIWM0  
USICS1  
USICS0  
USICLK  
USITC  
Reserved  
ASSR  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
EXCLK  
AS2  
TCN2UB  
OCR2UB  
TCR2UB  
147  
Reserved  
Reserved  
OCR2A  
-
-
-
-
-
-
-
-
-
-
Timer/Counter 2 Output Compare Register A  
Timer/Counter2  
146  
146  
TCNT2  
Reserved  
TCCR2A  
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  
OCR1BH  
OCR1BL  
OCR1AH  
OCR1AL  
ICR1H  
-
-
-
-
-
-
-
-
FOC2A  
WGM20  
COM2A1  
COM2A0  
WGM21  
CS22  
CS21  
CS20  
144  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Timer/Counter1 Output Compare Register B High  
Timer/Counter1 Output Compare Register B Low  
Timer/Counter1 Output Compare Register A High  
Timer/Counter1 Output Compare Register A Low  
Timer/Counter1 Input Capture Register High  
Timer/Counter1 Input Capture Register Low  
Timer/Counter1 High  
130  
130  
130  
130  
130  
130  
130  
130  
ICR1L  
TCNT1H  
TCNT1L  
Timer/Counter1 Low  
10  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Address  
Name  
Reserved  
TCCR1C  
TCCR1B  
TCCR1A  
DIDR1  
Bit 7  
Bit 6  
-
Bit 5  
-
Bit 4  
-
Bit 3  
-
Bit 2  
-
Bit 1  
-
Bit 0  
-
Page  
-
FOC1A  
ICNC1  
COM1A1  
-
(0x83)  
(0x82)  
FOC1B  
ICES1  
COM1A0  
-
-
-
-
-
CS12  
-
-
-
129  
128  
126  
201  
218  
-
WGM13  
WGM12  
CS11  
WGM11  
AIN1D  
ADC1D  
-
CS10  
WGM10  
AIN0D  
ADC0D  
-
(0x81)  
COM1B1  
COM1B0  
-
(0x80)  
-
-
ADC4D  
-
-
ADC3D  
-
-
(0x7F)  
DIDR0  
ADC7D  
-
ADC6D  
-
ADC5D  
-
ADC2D  
-
(0x7E)  
Reserved  
ADMUX  
ADCSRB  
ADCSRA  
ADCH  
(0x7D)  
REFS1  
-
REFS0  
ACME  
ADSC  
ADLAR  
-
MUX4  
-
MUX3  
-
MUX2  
ADTS2  
ADPS2  
MUX1  
ADTS1  
ADPS1  
MUX0  
ADTS0  
ADPS0  
214  
199/217  
216  
(0x7C)  
(0x7B)  
ADEN  
ADATE  
ADIF  
ADIE  
(0x7A)  
ADC Data Register High  
ADC Data Register Low  
217  
(0x79)  
ADCL  
217  
(0x78)  
Reserved  
Reserved  
Reserved  
Reserved  
PCMSK3  
Reserved  
Reserved  
TIMSK2  
TIMSK1  
TIMSK0  
PCMSK2  
PCMSK1  
PCMSK0  
Reserved  
EICRA  
-
-
-
-
-
-
-
-
(0x77)  
-
-
-
-
-
-
-
-
(0x76)  
-
-
-
-
-
-
-
-
(0x75)  
-
-
-
-
-
-
-
-
(0x74)  
-
PCINT30  
PCINT29  
PCINT28  
PCINT27  
PCINT26  
PCINT25  
PCINT24  
57  
(0x73)  
-
-
-
-
-
-
-
-
-
-
(0x72)  
-
-
-
-
-
-
(0x71)  
-
-
-
-
-
-
OCIE2A  
OCIE1A  
OCIE0A  
PCINT17  
PCINT9  
PCINT1  
-
TOIE2  
TOIE1  
TOIE0  
PCINT16  
PCINT8  
PCINT0  
-
149  
131  
102  
58  
(0x70)  
-
-
ICIE1  
-
-
OCIE1B  
(0x6F)  
-
-
-
-
-
-
(0x6E)  
PCINT23  
PCINT22  
PCINT21  
PCINT20  
PCINT19  
PCINT18  
(0x6D)  
PCINT15  
PCINT14  
PCINT13  
PCINT12  
PCINT11  
PCINT10  
58  
(0x6C)  
PCINT7  
PCINT6  
PCINT5  
PCINT4  
PCINT3  
PCINT2  
58  
(0x6B)  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
(0x6A)  
ISC01  
-
ISC00  
-
55  
(0x69)  
Reserved  
Reserved  
OSCCAL  
Reserved  
PRR  
(0x68)  
-
-
(0x67)  
Oscillator Calibration Register [CAL7..0]  
29  
38  
(0x66)  
-
-
-
-
-
-
-
-
-
-
(0x65)  
-
PRLCD  
PRTIM1  
PRSPI  
PSUSART0  
PRADC  
(0x64)  
Reserved  
Reserved  
CLKPR  
-
-
-
-
-
-
-
-
(0x63)  
-
-
-
-
-
CLKPS3  
WDE  
V
-
-
-
(0x62)  
CLKPCE  
-
-
-
WDCE  
S
CLKPS2  
WDP2  
N
CLKPS1  
WDP1  
Z
CLKPS0  
WDP0  
C
31  
46  
11  
13  
13  
(0x61)  
WDTCR  
SREG  
-
I
-
-
(0x60)  
T
H
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)  
SPH  
Stack Pointer High  
Stack Pointer Low  
SPL  
Reserved  
Reserved  
Reserved  
Reserved  
Reserved  
SPMCSR  
Reserved  
MCUCR  
MCUSR  
SMCR  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
SPMIE  
RWWSB  
RWWSRE  
BLBSET  
PGWRT  
PGERS  
SPMEN  
271  
JTD  
-
-
PUD  
-
WDRF  
SM2  
-
-
BORF  
SM1  
-
IVSEL  
EXTRF  
SM0  
-
IVCE  
PORF  
SE  
52/67/244  
-
-
-
JTRF  
44  
38  
-
-
-
-
Reserved  
OCDR  
-
-
-
OCDR5  
ACO  
-
-
OCDR4  
ACI  
-
IDRD/OCDR7  
OCDR6  
ACBG  
-
OCDR3  
ACIE  
-
OCDR2  
ACIC  
-
OCDR1  
ACIS1  
-
OCDR0  
ACIS0  
-
240  
199  
ACSR  
ACD  
-
Reserved  
SPDR  
-
SPI Data Register  
159  
159  
157  
24  
SPSR  
SPIF  
SPIE  
WCOL  
SPE  
-
-
-
-
-
SPI2X  
SPR0  
SPCR  
DORD  
MSTR  
CPOL  
CPHA  
SPR1  
GPIOR2  
GPIOR1  
Reserved  
Reserved  
OCR0A  
TCNT0  
General Purpose I/O Register  
General Purpose I/O Register  
24  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Timer/Counter0 Output Compare A  
Timer/Counter0  
102  
101  
Reserved  
-
-
-
-
-
-
-
-
11  
2552HS–AVR–11/06  
Address  
Name  
TCCR0A  
GTCCR  
EEARH  
EEARL  
EEDR  
Bit 7  
FOC0A  
TSM  
-
Bit 6  
WGM00  
Bit 5  
COM0A1  
Bit 4  
COM0A0  
Bit 3  
WGM01  
Bit 2  
CS02  
-
Bit 1  
CS01  
PSR2  
Bit 0  
CS00  
Page  
99  
0x24 (0x44)  
0x23 (0x43)  
0x22 (0x42)  
0x21 (0x41)  
0x20 (0x40)  
0x1F (0x3F)  
0x1E (0x3E)  
0x1D (0x3D)  
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)  
-
-
-
-
-
-
-
-
PSR10  
104/151  
20  
EEPROM Address Register High  
EEPROM Address Register Low  
EEPROM Data Register  
20  
20  
EECR  
-
-
-
-
EERIE  
EEMWE  
EEWE  
EERE  
20  
GPIOR0  
EIMSK  
EIFR  
General Purpose I/O Register  
24  
PCIE3  
PCIF3  
-
PCIE2  
PCIF2  
-
PCIE1  
PCIF1  
-
PCIE0  
PCIF0  
-
-
-
-
-
INT0  
INTF0  
-
56  
-
-
57  
Reserved  
Reserved  
Reserved  
Reserved  
TIFR2  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
OCF2A  
OCF1A  
OCF0A  
PORTG1  
DDG1  
PING1  
PORTF1  
DDF1  
PINF1  
PORTE1  
DDE1  
PINE1  
PORTD1  
DDD1  
PIND1  
PORTC1  
DDC1  
PINC1  
PORTB1  
DDB1  
PINB1  
PORTA1  
DDA1  
PINA1  
TOV2  
TOV1  
TOV0  
PORTG0  
DDG0  
PING0  
PORTF0  
DDF0  
PINF0  
PORTE0  
DDE0  
PINE0  
PORTD0  
DDD0  
PIND0  
PORTC0  
DDC0  
PINC0  
PORTB0  
DDB0  
PINB0  
PORTA0  
DDA0  
PINA0  
149  
131  
102  
88  
88  
88  
87  
87  
87  
87  
87  
87  
87  
87  
87  
86  
86  
86  
86  
86  
86  
86  
86  
86  
TIFR1  
-
-
ICF1  
-
-
-
OCF1B  
-
TIFR0  
-
-
-
-
PORTG  
DDRG  
PING  
-
-
-
PORTG4  
DDG4  
PING4  
PORTF4  
DDF4  
PINF4  
PORTE4  
DDE4  
PINE4  
PORTD4  
DDD4  
PIND4  
PORTC4  
DDC4  
PINC4  
PORTB4  
DDB4  
PINB4  
PORTA4  
DDA4  
PINA4  
PORTG3  
DDG3  
PING3  
PORTF3  
DDF3  
PINF3  
PORTE3  
DDE3  
PINE3  
PORTD3  
DDD3  
PIND3  
PORTC3  
DDC3  
PINC3  
PORTB3  
DDB3  
PINB3  
PORTA3  
DDA3  
PINA3  
PORTG2  
DDG2  
PING2  
PORTF2  
DDF2  
PINF2  
PORTE2  
DDE2  
PINE2  
PORTD2  
DDD2  
PIND2  
PORTC2  
DDC2  
PINC2  
PORTB2  
DDB2  
PINB2  
PORTA2  
DDA2  
PINA2  
-
-
-
-
-
PING5  
PORTF5  
DDF5  
PINF5  
PORTE5  
DDE5  
PINE5  
PORTD5  
DDD5  
PIND5  
PORTC5  
DDC5  
PINC5  
PORTB5  
DDB5  
PINB5  
PORTA5  
DDA5  
PINA5  
PORTF  
DDRF  
PORTF7  
DDF7  
PINF7  
PORTE7  
DDE7  
PINE7  
PORTD7  
DDD7  
PIND7  
PORTC7  
DDC7  
PINC7  
PORTB7  
DDB7  
PINB7  
PORTA7  
DDA7  
PINA7  
PORTF6  
DDF6  
PINF6  
PORTE6  
DDE6  
PINE6  
PORTD6  
DDD6  
PIND6  
PORTC6  
DDC6  
PINC6  
PORTB6  
DDB6  
PINB6  
PORTA6  
DDA6  
PINA6  
PINF  
PORTE  
DDRE  
PINE  
PORTD  
DDRD  
PIND  
PORTC  
DDRC  
PINC  
PORTB  
DDRB  
PINB  
PORTA  
DDRA  
PINA  
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 0x00 - 0x1F 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, unlike most other AVRs, the CBI and SBI  
instructions will only operate on the specified bit, and can therefore be used on registers containing such Status Flags. 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 0x00 - 0x3F must be used. When addressing I/O  
Registers as data space using LD and ST instructions, 0x20 must be added to these addresses. The  
ATmega329/3290/649/6490 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 0x60 - 0xFF in SRAM, only  
the ST/STS/STD and LD/LDS/LDD instructions can be used.  
12  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Instruction Set Summary  
Mnemonics  
Operands  
Description  
Operation  
Flags  
#Clocks  
ARITHMETIC AND LOGIC INSTRUCTIONS  
ADD  
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  
Add two Registers  
Rd Rd + Rr  
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  
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
ADC  
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  
Rd Rd + Rr + C  
Rdh:Rdl Rdh:Rdl + K  
Rd Rd - Rr  
ADIW  
SUB  
SUBI  
SBC  
Rd Rd - K  
Rd Rd - Rr - C  
Rd Rd - K - C  
Rdh:Rdl Rdh:Rdl - K  
Rd Rd Rr  
SBCI  
SBIW  
AND  
ANDI  
OR  
Rd Rd K  
Z,N,V  
Rd Rd v Rr  
Z,N,V  
ORI  
Logical OR Register and Constant  
Exclusive OR Registers  
One’s Complement  
Rd Rd v K  
Z,N,V  
EOR  
COM  
NEG  
SBR  
Rd Rd Rr  
Z,N,V  
Rd 0xFF Rd  
Rd 0x00 Rd  
Rd Rd v K  
Z,C,N,V  
Z,C,N,V,H  
Z,N,V  
Rd  
Two’s Complement  
Rd,K  
Rd,K  
Rd  
Set Bit(s) in Register  
CBR  
Clear Bit(s) in Register  
Increment  
Rd Rd (0xFF - K)  
Rd Rd + 1  
Z,N,V  
INC  
Z,N,V  
DEC  
Rd  
Decrement  
Rd Rd 1  
Z,N,V  
TST  
Rd  
Test for Zero or Minus  
Clear Register  
Rd Rd Rd  
Z,N,V  
CLR  
Rd  
Rd Rd Rd  
Rd 0xFF  
Z,N,V  
SER  
Rd  
Set Register  
None  
MUL  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Rd, Rr  
Multiply Unsigned  
R1:R0 Rd x Rr  
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  
Z,C  
MULS  
MULSU  
FMUL  
FMULS  
FMULSU  
Multiply Signed  
Z,C  
Multiply Signed with Unsigned  
Fractional Multiply Unsigned  
Fractional Multiply Signed  
Fractional Multiply Signed with Unsigned  
Z,C  
Z,C  
Z,C  
Z,C  
BRANCH INSTRUCTIONS  
RJMP  
IJMP  
k
Relative Jump  
PC PC + k + 1  
None  
None  
None  
None  
None  
None  
None  
I
2
2
Indirect Jump to (Z)  
PC Z  
JMP  
k
k
Direct Jump  
PC k  
3
RCALL  
ICALL  
CALL  
RET  
Relative Subroutine Call  
Indirect Call to (Z)  
PC PC + k + 1  
3
PC Z  
3
k
Direct Subroutine Call  
Subroutine Return  
PC k  
4
PC STACK  
4
RETI  
Interrupt Return  
PC STACK  
4
CPSE  
CP  
Rd,Rr  
Compare, Skip if Equal  
Compare  
if (Rd = Rr) PC PC + 2 or 3  
Rd Rr  
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  
None  
None  
1/2/3  
1
Rd,Rr  
CPC  
Rd,Rr  
Compare with Carry  
Rd Rr C  
1
CPI  
Rd,K  
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  
Rd K  
1
SBRC  
SBRS  
SBIC  
SBIS  
Rr, b  
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  
if (V = 1) then PC PC + k + 1  
if (V = 0) then PC PC + k + 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  
1/2  
1/2  
Rr, b  
P, b  
P, b  
s, k  
s, k  
k
BRBS  
BRBC  
BREQ  
BRNE  
BRCS  
BRCC  
BRSH  
BRLO  
BRMI  
BRPL  
BRGE  
BRLT  
BRHS  
BRHC  
BRTS  
BRTC  
BRVS  
BRVC  
k
Branch if Not Equal  
k
Branch if Carry Set  
k
Branch if Carry Cleared  
Branch if Same or Higher  
Branch if Lower  
k
k
k
Branch if Minus  
k
Branch if Plus  
k
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  
k
k
k
k
k
Branch if T Flag Cleared  
Branch if Overflow Flag is Set  
Branch if Overflow Flag is Cleared  
k
k
13  
2552HS–AVR–11/06  
Mnemonics  
Operands  
Description  
Operation  
Flags  
#Clocks  
BRIE  
BRID  
k
k
Branch if Interrupt Enabled  
if ( I = 1) then PC PC + k + 1  
if ( I = 0) then PC PC + k + 1  
None  
1/2  
1/2  
Branch if Interrupt Disabled  
None  
BIT AND BIT-TEST INSTRUCTIONS  
SBI  
P,b  
P,b  
Rd  
Rd  
Rd  
Rd  
Rd  
Rd  
s
Set Bit in I/O Register  
Clear Bit in I/O Register  
Logical Shift Left  
I/O(P,b) 1  
None  
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
CBI  
I/O(P,b) 0  
None  
LSL  
Rd(n+1) Rd(n), Rd(0) 0  
Z,C,N,V  
LSR  
ROL  
ROR  
ASR  
SWAP  
BSET  
BCLR  
BST  
BLD  
SEC  
CLC  
SEN  
CLN  
SEZ  
CLZ  
SEI  
Logical Shift Right  
Rd(n) Rd(n+1), Rd(7) 0  
Z,C,N,V  
Rotate Left Through Carry  
Rotate Right Through Carry  
Arithmetic Shift Right  
Swap Nibbles  
Rd(0)C,Rd(n+1)Rd(n),CRd(7)  
Z,C,N,V  
Rd(7)C,Rd(n)Rd(n+1),CRd(0)  
Z,C,N,V  
Rd(n) Rd(n+1), n=0..6  
Z,C,N,V  
Rd(3..0)Rd(7..4),Rd(7..4)Rd(3..0)  
None  
Flag Set  
SREG(s) 1  
SREG(s) 0  
T Rr(b)  
Rd(b) T  
C 1  
SREG(s)  
s
Flag Clear  
SREG(s)  
Rr, b  
Rd, b  
Bit Store from Register to T  
Bit load from T to Register  
Set Carry  
T
None  
C
C
N
N
Z
Clear Carry  
C 0  
Set Negative Flag  
N 1  
Clear Negative Flag  
Set Zero Flag  
N 0  
Z 1  
Clear Zero Flag  
Z 0  
Z
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  
I 1  
I
CLI  
I 0  
I
SES  
CLS  
SEV  
CLV  
SET  
CLT  
SEH  
CLH  
S 1  
S
S
V
V
T
S 0  
V 1  
V 0  
T 1  
Clear T in SREG  
T 0  
T
Set Half Carry Flag in SREG  
Clear Half Carry Flag in SREG  
H 1  
H
H
H 0  
DATA TRANSFER INSTRUCTIONS  
MOV  
MOVW  
LDI  
LD  
Rd, Rr  
Rd, Rr  
Rd, K  
Move Between Registers  
Copy Register Word  
Rd Rr  
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  
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
-
Rd+1:Rd Rr+1:Rr  
Load Immediate  
Rd K  
Rd, X  
Load Indirect  
Rd (X)  
LD  
Rd, X+  
Rd, - X  
Rd, Y  
Load Indirect and Post-Inc.  
Load Indirect and Pre-Dec.  
Load Indirect  
Rd (X), X X + 1  
X X - 1, Rd (X)  
Rd (Y)  
LD  
LD  
LD  
Rd, Y+  
Rd, - Y  
Rd,Y+q  
Rd, Z  
Load Indirect and Post-Inc.  
Load Indirect and Pre-Dec.  
Load Indirect with Displacement  
Load Indirect  
Rd (Y), Y Y + 1  
Y Y - 1, Rd (Y)  
Rd (Y + q)  
Rd (Z)  
LD  
LDD  
LD  
LD  
Rd, Z+  
Rd, -Z  
Rd, Z+q  
Rd, k  
Load Indirect and Post-Inc.  
Load Indirect and Pre-Dec.  
Load Indirect with Displacement  
Load Direct from SRAM  
Store Indirect  
Rd (Z), Z Z+1  
Z Z - 1, Rd (Z)  
Rd (Z + q)  
Rd (k)  
LD  
LDD  
LDS  
ST  
X, Rr  
(X) Rr  
ST  
X+, Rr  
- X, Rr  
Y, Rr  
Store Indirect and Post-Inc.  
Store Indirect and Pre-Dec.  
Store Indirect  
(X) Rr, X X + 1  
X X - 1, (X) Rr  
(Y) Rr  
ST  
ST  
ST  
Y+, Rr  
- Y, Rr  
Y+q,Rr  
Z, Rr  
Store Indirect and Post-Inc.  
Store Indirect and Pre-Dec.  
Store Indirect with Displacement  
Store Indirect  
(Y) Rr, Y Y + 1  
Y Y - 1, (Y) Rr  
(Y + q) Rr  
ST  
STD  
ST  
(Z) Rr  
ST  
Z+, Rr  
-Z, Rr  
Z+q,Rr  
k, Rr  
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  
Store Program Memory  
In Port  
(Z) Rr, Z Z + 1  
Z Z - 1, (Z) Rr  
(Z + q) Rr  
ST  
STD  
STS  
LPM  
LPM  
LPM  
SPM  
IN  
(k) Rr  
R0 (Z)  
Rd, Z  
Rd (Z)  
Rd, Z+  
Rd (Z), Z Z+1  
(Z) R1:R0  
Rd, P  
P, Rr  
Rr  
Rd P  
1
1
2
OUT  
PUSH  
Out Port  
P Rr  
Push Register on Stack  
STACK Rr  
14  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Mnemonics  
Operands  
Description  
Operation  
Flags  
#Clocks  
POP  
Rd  
Pop Register from Stack  
Rd STACK  
None  
2
MCU CONTROL INSTRUCTIONS  
NOP  
No Operation  
Sleep  
None  
None  
None  
None  
1
1
SLEEP  
WDR  
(see specific descr. for Sleep function)  
(see specific descr. for WDR/timer)  
For On-chip Debug Only  
Watchdog Reset  
Break  
1
BREAK  
N/A  
15  
2552HS–AVR–11/06  
Ordering Information  
ATmega329  
Speed (MHz)(3)  
Power Supply  
Ordering Code  
Package Type(1)  
Operational Range  
ATmega329V-8AI  
ATmega329V-8AU(2)  
ATmega329V-8MI  
ATmega329V-8MU(2)  
64A  
64A  
64M1  
64M1  
Industrial  
(-40°C to 85°C)  
8
1.8 - 5.5V  
2.7 - 5.5V  
ATmega329-16AI  
ATmega329-16AU(2)  
ATmega329-16MI  
ATmega329-16MU(2)  
64A  
64A  
64M1  
64M1  
Industrial  
(-40°C to 85°C)  
16  
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. Pb-free packaging alternative, complies to the European Directive for Restriction of Hazardous Substances (RoHS direc-  
tive). Also Halide free and fully Green.  
3. For Speed vs. VCC see Figure 138 on page 314 and Figure 139 on page 315.  
Package Type  
64A  
64-lead, 14 x 14 x 1.0 mm, Thin Profile Plastic Quad Flat Package (TQFP)  
64M1  
100A  
64-pad, 9 x 9 x 1.0 mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
100-lead, 14 x 14 x 1.0 mm, 0.5 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)  
16  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
ATmega3290  
Speed (MHz)(3)  
Power Supply  
Ordering Code  
Package Type(1)  
Operational Range  
ATmega3290V-8AI  
100A  
100A  
Industrial  
(-40°C to 85°C)  
8
1.8 - 5.5V  
ATmega3290V-8AU(2)  
ATmega3290-16AI  
100A  
100A  
Industrial  
(-40°C to 85°C)  
16  
2.7 - 5.5V  
ATmega3290-16AU(2)  
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. Pb-free packaging alternative, complies to the European Directive for Restriction of Hazardous Substances (RoHS direc-  
tive). Also Halide free and fully Green.  
3. For Speed vs. VCC see Figure 138 on page 314 and Figure 139 on page 315.  
Package Type  
64A  
64-lead, 14 x 14 x 1.0 mm, Thin Profile Plastic Quad Flat Package (TQFP)  
64M1  
100A  
64-pad, 9 x 9 x 1.0 mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
100-lead, 14 x 14 x 1.0 mm, 0.5 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)  
17  
2552HS–AVR–11/06  
ATmega649  
Speed (MHz)(3)  
Power Supply  
Ordering Code  
Package Type(1)  
Operational Range  
ATmega649V-8AI  
ATmega649V-8AU(2)  
ATmega649V-8MI  
ATmega649V-8MU(2)  
64A  
64A  
64M1  
64M1  
Industrial  
(-40°C to 85°C)  
8
1.8 - 5.5V  
ATmega649-16AI  
ATmega649-16AU(2)  
ATmega649-16MI  
ATmega649-16MU(2)  
64A  
64A  
64M1  
64M1  
Industrial  
(-40°C to 85°C)  
16  
2.7 - 5.5V  
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. Pb-free packaging alternative, complies to the European Directive for Restriction of Hazardous Substances (RoHS direc-  
tive). Also Halide free and fully Green.  
3. For Speed vs. VCC see Figure 138 on page 314 and Figure 139 on page 315.  
Package Type  
64A  
64-lead, 14 x 14 x 1.0 mm, Thin Profile Plastic Quad Flat Package (TQFP)  
64M1  
100A  
64-pad, 9 x 9 x 1.0 mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
100-lead, 14 x 14 x 1.0 mm, 0.5 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)  
18  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
ATmega6490  
Speed (MHz)(3)  
Power Supply  
Ordering Code  
Package Type(1)  
Operational Range  
ATmega6490V-8AI  
100A  
100A  
Industrial  
(-40°C to 85°C)  
8
1.8 - 5.5V  
ATmega6490V-8AU(2)  
ATmega6490-16AI  
100A  
100A  
Industrial  
(-40°C to 85°C)  
16  
2.7 - 5.5V  
ATmega6490-16AU(2)  
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. Pb-free packaging alternative, complies to the European Directive for Restriction of Hazardous Substances (RoHS direc-  
tive). Also Halide free and fully Green.  
3. For Speed vs. VCC see Figure 138 on page 314 and Figure 139 on page 315.  
Package Type  
64A  
64-lead, 14 x 14 x 1.0 mm, Thin Profile Plastic Quad Flat Package (TQFP)  
64M1  
100A  
64-pad, 9 x 9 x 1.0 mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)  
100-lead, 14 x 14 x 1.0 mm, 0.5 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)  
19  
2552HS–AVR–11/06  
Packaging Information  
64A  
PIN 1  
B
PIN 1 IDENTIFIER  
E1  
E
e
D1  
D
C
0˚~7˚  
A2  
A
A1  
L
COMMON DIMENSIONS  
(Unit of Measure = mm)  
MIN  
MAX  
1.20  
NOM  
NOTE  
SYMBOL  
A
A1  
A2  
D
0.05  
0.95  
15.75  
13.90  
15.75  
13.90  
0.30  
0.09  
0.45  
0.15  
1.00  
16.00  
14.00  
16.00  
14.00  
1.05  
16.25  
D1  
E
14.10 Note 2  
16.25  
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.  
E1  
B
14.10 Note 2  
0.45  
C
0.20  
3. Lead coplanarity is 0.10 mm maximum.  
L
0.75  
e
0.80 TYP  
10/5/2001  
TITLE  
DRAWING NO. REV.  
2325 Orchard Parkway  
San Jose, CA 95131  
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)  
64A  
B
R
20  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
64M1  
D
Marked Pin# 1 ID  
E
SEATING PLANE  
C
A1  
TOP VIEW  
A
K
0.08  
C
L
Pin #1 Corner  
SIDE VIEW  
D2  
Pin #1  
Triangle  
Option A  
1
2
3
COMMON DIMENSIONS  
(Unit of Measure = mm)  
MIN  
0.80  
MAX  
1.00  
0.05  
0.30  
9.10  
NOM  
0.90  
0.02  
0.25  
9.00  
NOTE  
SYMBOL  
E2  
Option B  
Option C  
A
Pin #1  
Chamfer  
(C 0.30)  
A1  
b
0.18  
8.90  
D
D2  
E
5.20  
5.40  
9.00  
5.60  
9.10  
K
Pin #1  
Notch  
(0.20 R)  
8.90  
e
b
E2  
e
5.20  
5.40  
0.50 BSC  
0.40  
5.60  
BOTTOM VIEW  
L
0.35  
1.25  
0.45  
1.55  
K
1.40  
1. JEDEC Standard MO-220, (SAW Singulation) Fig. 1, VMMD.  
2. Dimension and tolerance conform to ASMEY14.5M-1994.  
Note:  
5/25/06  
DRAWING NO. REV.  
64M1  
TITLE  
2325 Orchard Parkway  
San Jose, CA 95131  
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)  
G
R
21  
2552HS–AVR–11/06  
100A  
PIN 1  
B
PIN 1 IDENTIFIER  
E1  
E
e
D1  
D
C
0˚~7˚  
A2  
A
A1  
L
COMMON DIMENSIONS  
(Unit of Measure = mm)  
MIN  
MAX  
1.20  
NOM  
NOTE  
SYMBOL  
A
A1  
A2  
D
0.05  
0.95  
15.75  
13.90  
15.75  
13.90  
0.17  
0.09  
0.45  
0.15  
1.00  
16.00  
14.00  
16.00  
14.00  
1.05  
16.25  
D1  
E
14.10 Note 2  
16.25  
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.  
E1  
B
14.10 Note 2  
0.27  
C
0.20  
3. Lead coplanarity is 0.08 mm maximum.  
L
0.75  
e
0.50 TYP  
10/5/2001  
TITLE  
DRAWING NO. REV.  
2325 Orchard Parkway  
San Jose, CA 95131  
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)  
100A  
C
R
22  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Errata  
ATmega329 rev. C  
Interrupts may be lost when writing the timer registers in the asynchronous timer  
1. Interrupts may be lost when writing the timer registers in the asynchronous  
timer  
If one of the timer registers which is synchronized to the asynchronous timer2 clock  
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.  
Problem Fix/Wortkaround  
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the  
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare  
Register, OCR2.  
ATmega329 rev. B  
ATmega329 rev. A  
Not sampled.  
LCD contrast voltage too high  
Interrupts may be lost when writing the timer registers in the asynchronous timer  
1. LCD contrast voltage too high  
When the LCD is active and using low power waveform, the LCD contrast voltage  
can be too high. This occurs when VCC is higher than VLCD, and when using low  
LCD drivetime.  
Problem Fix/Workaround  
There are several possible workarounds:  
- Use normal waveform instead of low power waveform  
- Use drivetime of 375 µs or longer  
2. Interrupts may be lost when writing the timer registers in the asynchronous  
timer  
If one of the timer registers which is synchronized to the asynchronous timer2 clock  
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.  
Problem Fix/Wortkaround  
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the  
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare  
Register, OCR2.  
23  
2552HS–AVR–11/06  
ATmega3290 rev. C  
Interrupts may be lost when writing the timer registers in the asynchronous timer  
1. Interrupts may be lost when writing the timer registers in the asynchronous  
timer  
If one of the timer registers which is synchronized to the asynchronous timer2 clock  
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.  
Problem Fix/Wortkaround  
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the  
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare  
Register, OCR2.  
ATmega3290 rev. B  
ATmega3290 rev. A  
Not sampled.  
LCD contrast voltage too high  
Interrupts may be lost when writing the timer registers in the asynchronous timer  
1. LCD contrast voltage too high  
When the LCD is active and using low power waveform, the LCD contrast voltage  
can be too high. This occurs when VCC is higher than VLCD, and when using low  
LCD drivetime.  
Problem Fix/Workaround  
There are several possible workarounds:  
- Use normal waveform instead of low power waveform  
- Use drivetime of 375 µs or longer  
2. Interrupts may be lost when writing the timer registers in the asynchronous  
timer  
If one of the timer registers which is synchronized to the asynchronous timer2 clock  
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.  
Problem Fix/Wortkaround  
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the  
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare  
Register, OCR2.  
24  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
ATmega649 rev. A  
Interrupts may be lost when writing the timer registers in the asynchronous timer  
1. Interrupts may be lost when writing the timer registers in the asynchronous  
timer  
If one of the timer registers which is synchronized to the asynchronous timer2 clock  
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.  
Problem Fix/Wortkaround  
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the  
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare  
Register, OCR2.  
ATmega6490 rev. A  
Interrupts may be lost when writing the timer registers in the asynchronous timer  
1. Interrupts may be lost when writing the timer registers in the asynchronous  
timer  
If one of the timer registers which is synchronized to the asynchronous timer2 clock  
is written in the cycle before a overflow interrupt occurs, the interrupt may be lost.  
Problem Fix/Wortkaround  
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the  
value 0xFF before writing the Timer2 Control Register, TCCR2, or Output Compare  
Register, OCR2.  
25  
2552HS–AVR–11/06  
Datasheet Revision  
History  
Please note that the referring page numbers in this section are referring to this docu-  
ment.The referring revision in this section are referring to the document revision.  
Rev. 2552H – 11/06  
1.  
2.  
Updated Table 141 on page 318.  
Updated note in Table 141 on page 318 and Table 143 on page 319.  
Rev. 2552G – 07/06  
1.  
Updated Table 55 on page 100, Table 57 on page 100, Table 62 on page  
127, Table 64 on page 128, Table 64 on page 128, Table 67 on page 144  
and Table 69 on page 145.  
2.  
3.  
4.  
5.  
Updated “Fast PWM Mode” on page 118.  
Updated Features in “USI – Universal Serial Interface” on page 187.  
Added “Clock speed considerations.” on page 194.  
“Errata” on page 364.  
Rev. 2552F – 06/06  
1.  
2.  
3.  
Updated “Calibrated Internal RC Oscillator” on page 28.  
Updated “OSCCAL – Oscillator Calibration Register” on page 29  
Added Table 143 on page 319.  
Rev. 2552E – 04/06  
Rev. 2552D – 03/06  
Rev. 2552C – 03/06  
1.  
1.  
Updated “Calibrated Internal RC Oscillator” on page 28.  
Updated “Errata” on page 364.  
1.  
2.  
3.  
4.  
Added “Resources” on page 8.  
Added Addresses in Registers.  
Updated number of General Purpose I/O pins.  
Updated code example in “Bit 0 – IVCE: Interrupt Vector Change Enable”  
on page 52.  
5.  
6.  
7.  
Updated Introduction in “I/O-Ports” on page 59.  
Updated “SPI – Serial Peripheral Interface” on page 152.  
Updated “Bit 6 – ACBG: Analog Comparator Bandgap Select” on page  
201.  
8.  
9.  
Updated Features in “Analog to Digital Converter” on page 203.  
Updated “Prescaling and Conversion Timing” on page 206.  
10. Updated features in “LCD Controller” on page 220.  
11. Updated “ATmega329/3290/649/6490 Boot Loader Parameters” on page  
280.  
12. Updated “DC Characteristics” on page 310.  
13. Updated “LCD Controller Characteristics – Preliminary Data – TBD” on  
page 319.  
26  
ATmega329/3290/649/6490  
2552HS–AVR–11/06  
ATmega329/3290/649/6490  
Rev. 2552B – 05/05  
1.  
MLF-package alternative changed to “Quad Flat No-Lead/Micro Lead  
Frame Package QFN/MLF”.  
2.  
3.  
Added “Pin Change Interrupt Timing” on page 54.  
Updated Table 104 on page 233, Table 105 on page 234 and Table 137 on  
page 299.  
4.  
5.  
6.  
7.  
8.  
Added Figure 131 on page 300.  
Updated Figure 92 on page 211 and Figure 124 on page 292.  
Updated algorithm “Enter Programming Mode” on page 287.  
Added “Supply Current of I/O modules” on page 325.  
Updated “Ordering Information” on page 357.  
Rev. 2552A –11/04  
1.  
Initial version.  
27  
2552HS–AVR–11/06  
Atmel Corporation  
Atmel Operations  
2325 Orchard Parkway  
San Jose, CA 95131, USA  
Tel: 1(408) 441-0311  
Fax: 1(408) 487-2600  
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74025 Heilbronn, Germany  
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San Jose, CA 95131, USA  
Tel: 1(408) 441-0311  
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Regional Headquarters  
Microcontrollers  
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San Jose, CA 95131, USA  
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Fax: 1(408) 436-4314  
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2552HS–AVR–11/06  

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