Features
• High-performance, Low-power Atmel
• Advanced RISC Architecture
– 131 Powerful Instructions – Most Single-clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 20MIPS Throughput at 20MHz
– On-chip 2-cycle Multiplier
• High Endurance Non-volatile Memory segments
– 16/32/64/128KBytes of In-System Self-programmable Flash program memory
– 512/1K/2K/4KBytes EEPROM
– 1/2/4/16KBytes 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
• QTouch
• JTAG (IEEE std. 1149.1 Compliant) Interface
• Peripheral Features
• Special Microcontroller Features
• I/O and Packages
• Operating Voltages
• Speed Grades
• Power Consumption at 1MHz, 1.8V, 25°C
®
library support
– Capacitive touch buttons, sliders and wheels
– QTouch and QMatrix acquisition
– Up to 64 sense channels
– 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
– Two 8-bit Timer/Counters with Separate Prescalers and Compare Modes
– One/two 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
– Real Time Counter with Separate Oscillator
– Six PWM Channels
– 8-channel, 10-bit ADC
Differential mode with selectable gain at 1x, 10x or 200x
– Byte-oriented Two-wire Serial Interface
– Two Programmable Serial USART
– Master/Slave SPI Serial Interface
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
– Interrupt and Wake-up on Pin Change
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated RC Oscillator
– External and Internal Interrupt Sources
– Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby and
Extended Standby
– 32 Programmable I/O Lines
– 40-pin PDIP, 44-lead TQFP, 44-pad VQFN/QFN/MLF
– 44-pad DRQFN
– 49-ball VFBGA
– 1.8 - 5.5V
– 0 - 4MHz @ 1.8 - 5.5V
– 0 - 10MHz @ 2.7 - 5.5V
– 0 - 20MHz @ 4.5 - 5.5V
– Active: 0.4mA
– Power-down Mode: 0.1µA
– Power-save Mode: 0.6µA (Including 32kHz RTC)
®
AVR® 8-bit Microcontroller
(1)
8-bit Atmel
Microcontroller
with
16/32/64/128K
Bytes In-System
Programmable
Flash
ATmega164A
ATmega164PA
ATmega324A
ATmega324PA
ATmega644A
ATmega644PA
ATmega1284
ATmega1284P
Summary
Note: 1. See ”Data Retention” on page 9 for details.
8272CS–AVR–06/11
ATmega164A/PA/324A/PA/644A/PA/1284/P
1. Pin Configurations
1.1 Pinout - PDIP/TQFP/VQFN/QFN/MLF for ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P
Figure 1-1. Pinout
(PCINT8/XCK0/T0) PB0
(PCINT9/CLKO/T1) PB1
(PCINT10/INT2/AIN0) PB2
(PCINT11/OC0A/AIN1) PB3
(PCINT12/OC0B/SS) PB4
(PCINT13/ICP3/MOSI) PB5
(PCINT14/OC3A/MISO) PB6
(PCINT15/OC3B/SCK) PB7
RESET
VCC
GND
XTAL2
XTAL1
(PCINT24/RXD0/T3) PD0
(PCINT25/TXD0) PD1
(PCINT26/RXD1/INT0) PD2
(PCINT27/TXD1/INT1) PD3
(PCINT28/XCK1/OC1B) PD4
(PCINT29/OC1A) PD5
(PCINT30/OC2B/ICP) PD6
TQFP/QFN/MLF
PB4 (SS/OC0B/PCINT12)
PB3 (AIN1/OC0A/PCINT11)
PB2 (AIN0/INT2/PCINT10)
PB1 (T1/CLKO/PCINT9)
PB0 (XCK0/T0/PCINT8)
GND
VCC
PA0 (ADC0/PCINT0)
PA1 (ADC1/PCINT1)
PA0 (ADC0/PCINT0)
PA1 (ADC1/PCINT1)
PA2 (ADC2/PCINT2)
PA3 (ADC3/PCINT3)
PA4 (ADC4/PCINT4)
PA5 (ADC5/PCINT5)
PA6 (ADC6/PCINT6)
PA7 (ADC7/PCINT7)
AREF
GND
AVC C
PC7 (TOSC2/PCINT23)
PC6 (TOSC1/PCINT22)
PC5 (TDI/PCINT21)
PC4 (TDO/PCINT20)
PC3 (TMS/PCINT19)
PC2 (TCK/PCINT18)
PC1 (SDA/PCINT17)
PC0 (SCL/PCINT16)
PD7 (OC2A/PCINT31)
PA2 (ADC2/PCINT2)
PA3 (ADC3/PCINT3)
8272CS–AVR–06/11
(PCINT13/ICP3/MOSI) PB5
(PCINT14/OC3A/MISO) PB6
(PCINT15/OC3B/SCK) PB7
RESET
VCC
GND
XTAL2
XTAL1
(PCINT24/RXD0/T3) PD0
(PCINT25/TXD0) PD1
(PCINT26/RXD1/INT0) PD2
VCC
GND
(PCINT16/SCL) PC0
(PCINT29/OC1A) PD5
(PCINT31/OC2A) PD7
(PCINT30/OC2B/ICP) PD6
(PCINT27/TXD1/INT1) PD3
(PCINT28/XCK1/OC1B) PD4
(PCINT17/SDA) PC1
(PCINT18/TCK) PC2
PA4 (ADC4/PCINT4)
PA5 (ADC5/PCINT5)
PA6 (ADC6/PCINT6)
PA7 (ADC7/PCINT7)
AREF
GND
AVC C
PC7 (TOSC2/PCINT23)
PC6 (TOSC1/PCINT22)
PC5 (TDI/PCINT21)
PC4 (TDO/PCINT20)
(PCINT19/TMS) PC3
Note: The large center pad underneath the VQFN/QFN/MLF package should be soldered to ground on
the board to ensure good mechanical stability.
2
ATmega164A/PA/324A/PA/644A/PA/1284/P
Top view Bottom view
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
A18
B15
A17
B14
A16
B13
A15
B12
A14
B11
A13
A12
B10
A11
B9
A10
B8A9 B7A8 B6
A7
A24
B20
A23
B19
A22
B18
A21
B17
A20
B16
A19
A18
B15
A17
B14
A16
B13
A15
B12
A14
B11
A13
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
A19
B16
A20
B17
A21
B18
A22
B19
A23
B20
A24
1.2 Pinout - DRQFN for ATmega164A/164PA/324A/324PA
Figure 1-2. DRQFN - Pinout
Table 1-1. DRQFN - Pinout
A1 PB5 A7 PD3 A13 PC4 A19 PA 3
B1 PB6 B6 PD4 B11 PC5 B16 PA 2
A2 PB7 A8 PD5 A14 PC6 A20 PA 1
B2 RESET
A3 VCC A9 PD7 A15 AVC C A21 VCC
B3 GND B8 VCC B13 GND B18 GND
A4 XTAL2 A10 GND A16 AREF A22 PB0
B4 XTAL1 B9 PC0 B14 PA 7 B19 PB1
A5 PD0 A11 PC1 A17 PA 6 A23 PB2
B5 PD1 B10 PC2 B15 PA 5 B20 PB3
8272CS–AVR–06/11
A6 PD2 A12 PC3 A18 PA 4 A24 PB4
B7 PD6 B12 PC7 B17 PA 0
3
ATmega164A/PA/324A/PA/644A/PA/1284/P
A
B
C
D
E
F
G
1 234567
A
B
C
D
E
F
G
7654321
Top view Bottom view
1.3 Pinout - VFBGA for ATmega164A/164PA/324A/324PA
Figure 1-3. VFBGA - Pinout
Table 1-2. BGA - Pinout
1234567
A GND PB4 PB2 GND VCC PA2 GND
B PB6 PB5 PB3 PB0 PA0 PA3 PA5
C VCC RESET PB7 PB1 PA1 PA6 AREF
D GND XTAL2 PD0 GND PA4 PA7 GND
E XTAL1 PD1 PD5 PD7 PC5 PC7 AVCC
F PD2 PD3 PD6 PC0 PC2 PC4 PC6
G GND PD4 VCC GND PC1 PC3 GND
8272CS–AVR–06/11
4
2. Overview
The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 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 ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P
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
VCC
Powe r
RESET
Supervision
POR / BOD &
RESET
ATmega164A/PA/324A/PA/644A/PA/1284/P
PA7..0
PORT A (8)
PB7..0
PORT B (8)
GND
XTAL1
XTAL2
Watchdog
Timer
Watchdog
Oscillator
Oscillator
Circuits /
Clock
Generation
A/D
Converter
EEPROM
JTAG/OCD
TWI
PORT C (8)
Internal
Bandgap reference
CPU
SRAMFLASH
Analog
Comparator
SPI
8bit T/C 0
16bit T/C 1
8bit T/C 2
16bit T/C 3
PORT D (8)
USART 0
16bit T/C 1
USART 1
8272CS–AVR–06/11
TOSC1/PC6TOSC2/PC7
PC5..0
PD7..0
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.
5
ATmega164A/PA/324A/PA/644A/PA/1284/P
The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P provide the following features:
16/32/64/128Kbytes of In-System Programmable Flash with Read-While-Write capabilities,
512/1K/2K/4Kbytes EEPROM, 1/2/4/16Kbytes SRAM, 32 general purpose I/O lines, 32 general
purpose working registers, Real Time Counter (RTC), three flexible Timer/Counters with compare modes and PWM, 2 USARTs, a byte oriented 2-wire Serial Interface, a 8-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 Power-save mode, the asynchronous timer continues to
run, allowing the user to maintain a timer base while the rest of the device is sleeping. The ADC
Noise Reduction mode stops the CPU and all I/O modules except Asynchronous Timer and
ADC, to minimize switching noise during ADC conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up
combined with low power consumption. In Extended Standby mode, both the main Oscillator
and the Asynchronous Timer continue to run.
Atmel offers the QTouch
functionality into AVR microcontrollers. The patented charge-transfer signal acquisition offers
robust sensing and includes fully debounced reporting of touch keys and includes Adjacent Key
Suppression
®
(AKS™) technology for unambiguous detection of key events. The easy-to-use
QTouch Suite toolchain allows you to explore, develop and debug your own touch applications.
®
library for embedding capacitive touch buttons, sliders and wheels
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 ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control
applications.
The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 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.
8272CS–AVR–06/11
6
ATmega164A/PA/324A/PA/644A/PA/1284/P
2.2 Comparison Between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA, ATmega644A, ATmega644PA, ATmega1284 and ATmega1284P
Table 2-1. Differences between ATmega164A, ATmega164PA, ATmega324A, ATmega324PA, ATmega644A,
ATmega644PA, ATmega1284 and ATmega1284P
Device Flash EEPROM RAM Units
ATmega164A 16 K 512 1 K
ATmega164PA 16 K 512 1 K
ATmega324A 32 K 1 K 2 K
ATmega324PA 32 K 1 K 2 K
ATmega644A 64 K 2 K 4 K
ATmega644PA 64 K 2 K 4 K
ATmega1284 128 K 4 K 16 K
ATmega1284P 128 K 4 K 16 K
2.3 Pin Descriptions
2.3.1 VCC
bytes
Digital supply voltage.
2.3.2 GND
Ground.
2.3.3 Port A (PA7:PA0)
Port A serves as analog inputs to the Analog-to-digital Converter.
Port A also serves as 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
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P as listed on page 80.
2.3.4 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 also serves the functions of various special features of the
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P as listed on page 82.
2.3.5 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
8272CS–AVR–06/11
7
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 the JTAG interface, along with special features of the
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P as listed on page 85.
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 special features of the
ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P as listed on page 88.
2.3.7 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 337. Shorter pulses are not guaranteed to generate a reset.
ATmega164A/PA/324A/PA/644A/PA/1284/P
2.3.8 XTAL1
2.3.9 XTAL2
2.3.10 AVCC
2.3.11 AREF
Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.
Output from the inverting Oscillator amplifier.
AVCC is the supply voltage pin for Port A and the Analog-to-digital Converter. It should be externally connected to V
to V
through a low-pass filter.
CC
, even if the ADC is not used. If the ADC is used, it should be connected
CC
This is the analog reference pin for the Analog-to-digital Converter.
8272CS–AVR–06/11
8
3. Resources
A comprehensive set of development tools, application notes and datasheetsare 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.
The 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".
Note: 1.
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.
ATmega164A/PA/324A/PA/644A/PA/1284/P
6. Capacitive touch sensing
The Atmel® QTouch® Library provides a simple to use solution to realize touch sensitive interfaces on most Atmel AVR
QTouch and QMatrix
Touch sensing can be added to any application by linking the appropriate Atmel QTouch Library
for the AVR Microcontroller. This is done by using a simple set of APIs to define the touch channels and sensors, and then calling the touch sensing API’s to retrieve the channel information
and determine the touch sensor states.
The QTouch Library is FREE and downloadable from the Atmel website at the following location:
www.atmel.com/qtouchlibrary. For implementation details and other information, refer to the
Atmel QTouch Library User Guide - also available for download from the Atmel website.
®
®
acquisition methods.
microcontrollers. The QTouch Library includes support for the
8272CS–AVR–06/11
9
ATmega164A/PA/324A/PA/644A/PA/1284/P
7. Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
(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) Reserved - - - - - - - -
(0xD5) Reserved
(0xD4) Reserved
(0xD3) Reserved
(0xD2) Reserved - - - - - - - -
(0xD1) Reserved
(0xD0) Reserved
(0xCF) Reserved - - - - - - - -
(0xCE) UDR1 USART1 I/O Data Register 192
(0xCD) UBRR1H - - - - USART1 Baud Rate Register High Byte 196/209
(0xCC) UBRR1L USART1 Baud Rate Register Low Byte 196/209
(0xCB) Reserved
(0xCA) UCSR1C UMSEL11 UMSEL10 UPM11 UPM10 USBS1 UCSZ11/UDORD0
(0xC9) UCSR1B RXCIE1 TXCIE1 UDRIE1 RXEN1 TXEN1 UCSZ12 RXB81 TXB81 193/207
(0xC8) UCSR1A RXC1 TXC1 UDRE1 FE1 DOR1 UPE1 U2X1 MPCM1 192/207
(0xC7) Reserved
(0xC6) UDR0 USART0 I/O Data Register 192
(0xC5) UBRR0H - - - - USART0 Baud Rate Register High Byte 196/209
(0xC4) UBRR0L USART0 Baud Rate Register Low Byte 196/209
(0xC3) Reserved
(0xC2) UCSR0C UMSEL01 UMSEL00 UPM01 UPM00 USBS0 UCSZ01/UDORD0
(0xC1) UCSR0B RXCIE0 TXCIE0 UDRIE0 RXEN0 TXEN0 UCSZ02 RXB80 TXB80 193/207
- - - - - - - -
- - - - - - -
- - - - - - - -
- - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
(5)
UCSZ10/UCPHA0
(5)
UCSZ00/UCPHA0
(5)
UCPOL1 194/208
(5)
UCPOL0 194/208
8272CS–AVR–06/11
10
ATmega164A/PA/324A/PA/644A/PA/1284/P
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
(0xC0) UCSR0A RXC0 TXC0 UDRE0 FE0 DOR0 UPE0 U2X0 MPCM0 192/207
(0xBF) Reserved - - - - - - - -
(0xBE) Reserved - - - - - - - -
(0xBD) TWAMR TWAM6 TWAM5 TWAM4 TWAM3 TWAM2 TWAM1 TWAM0 - 238
(0xBC) TWCR TWINT TWEA TWSTA TWSTO TWWC TWEN -TWIE235
(0xBB) TWDR 2-wire Serial Interface Data Register 237
(0xBA) TWAR TWA6 TWA5 TWA4 TWA3 TWA2 TWA1 TWA0 TWGCE 238
(0xB9) TWSR TWS7 TWS6 TWS5 TWS4 TWS3 - TWPS1 TWPS0 237
(0xB8) TWBR 2-wire Serial Interface Bit Rate Register 235
(0xB7) Reserved - - - - - - - -
(0xB6) ASSR - EXCLK AS2 TCN2UB OCR2AUB OCR2BUB TCR2AUB TCR2BUB 161
(0xB5) Reserved - - - - - - - -
(0xB4) OCR2B Timer/Counter2 Output Compare Register B 160
(0xB3) OCR2A Timer/Counter2 Output Compare Register A 160
(0xB2) TCNT2 Timer/Counter2 (8 Bit) 160
(0xB1) TCCR2B FOC2A FOC2B - - WGM22 CS22 CS21 CS20 159
(0xB0) TCCR2A COM2A1 COM2A0 COM2B1 COM2B0 - -WGM21WGM20156
(0xAF) Reserved
(0xAE) Reserved
(0xAD) Reserved - - - - - - - -
(0xAC) Reserved - - - - - - - -
(0xAB) Reserved - - - - - - - -
(0xAA) Reserved - - - - - - - -
(0xA9) Reserved - - - - - - - -
(0xA8) Reserved - - - - - - - -
(0xA7) Reserved - - - - - - - -
(0xA6) Reserved - - - - - - - -
(0xA5) Reserved - - - - - - - -
(0xA4) Reserved - - - - - - - -
(0xA3) Reserved - - - - - - - -
(0xA2) Reserved - - - - - - - -
(0xA1) Reserved - - - - - - - -
(0xA0) Reserved - - - - - - - -
(0x9F) Reserved - - - - - - - -
(0x9E) Reserved - - - - - - - -
(0x9D) Reserved - - - - - - - -
(0x9C) Reserved - - - - - - - -
(0x9B) OCR3BH Timer/Counter3 - Output Compare Register B High Byte 137
(0x9A) OCR3BL Timer/Counter3 - Output Compare Register B Low Byte 137
(0x99) OCR3AH Timer/Counter3 - Output Compare Register A High Byte 136
(0x98) OCR3AL Timer/Counter3 - Output Compare Register A Low Byte 136
(0x97) ICR3H Timer/Counter3 - Input Capture Register High Byte 137
(0x96) ICR3L Timer/Counter3 - Input Capture Register Low Byte 137
(0x95) TCNT3H Timer/Counter3 - Counter Register High Byte 136
(0x94) TCNT3L Timer/Counter3 - Counter Register Low Byte 136
(0x93) Reserved - - - - - - - -
(0x92) TCCR3C FOC3A FOC3B - - - - - - 135
(0x91) TCCR3B ICNC3 ICES3
(0x90) TCCR3A COM3A1 COM3A0 COM3B1 COM3B0
(0x8F) Reserved
(0x8E) Reserved - - - - - - - -
(0x8D) Reserved
(0x8C) Reserved
(0x8B) OCR1BH Timer/Counter1 - Output Compare Register B High Byte 137
(0x8A) OCR1BL Timer/Counter1 - Output Compare Register B Low Byte 137
(0x89) OCR1AH Timer/Counter1 - Output Compare Register A High Byte 136
(0x88) OCR1AL Timer/Counter1 - Output Compare Register A Low Byte 136
(0x87) ICR1H Timer/Counter1 - Input Capture Register High Byte 137
(0x86) ICR1L Timer/Counter1 - Input Capture Register Low Byte 137
(0x85) TCNT1H Timer/Counter1 - Counter Register High Byte 136
(0x84) TCNT1L Timer/Counter1 - Counter Register Low Byte 136
(0x83) Reserved
(0x82) TCCR1C FOC1A FOC1B
(0x81) TCCR1B ICNC1 ICES1
(0x80) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 - -WGM11WGM10132
(0x7F) DIDR1
- - - - - - - -
- - - - - - - -
- WGM33 WGM32 CS32 CS31 CS30 134
- -WGM31WGM30132
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - - -
- - - - - - 135
- WGM13 WGM12 CS12 CS11 CS10 134
- - - - - -AIN1DAIN0D242
8272CS–AVR–06/11
11
ATmega164A/PA/324A/PA/644A/PA/1284/P
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
(0x7E) DIDR0 ADC7D ADC6D ADC5D ADC4D ADC3D ADC2D ADC1D ADC0D 262
(0x7D) Reserved - - - - - - - -
(0x7C) ADMUX REFS1 REFS0 ADLAR MUX4 MUX3 MUX2 MUX1 MUX0 258
(0x7B) ADCSRB -ACME - - - ADTS2 ADTS1 ADTS0 241
(0x7A) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 260
(0x79) ADCH ADC Data Register High byte 261
(0x78) ADCL ADC Data Register Low byte 261
(0x77) Reserved - - - - - - - -
(0x76) Reserved - - - - - - - -
(0x75) Reserved - - - - - - - -
(0x74) Reserved - - - - - - - -
(0x73) PCMSK3 PCINT31 PCINT30 PCINT29 PCINT28 PCINT27 PCINT26 PCINT25 PCINT24 70
(0x72) Reserved - - - - - - - -
(0x71) TIMSK3 - -ICIE3 - - OCIE3B OCIE3A TOIE3 139
(0x70) TIMSK2 - - - - - OCIE2B OCIE2A TOIE2 162
(0x6F) TIMSK1 - -ICIE1 - - OCIE1B OCIE1A TOIE1 138
(0x6E) TIMSK0 - - - - - OCIE0B OCIE0A TOIE0 109
(0x6D) PCMSK2 PCINT23 PCINT22 PCINT21 PCINT20 PCINT19 PCINT18 PCINT17 PCINT16 70
(0x6C) PCMSK1 PCINT15 PCINT14 PCINT13 PCINT12 PCINT11 PCINT10 PCINT9 PCINT8 70
(0x6B) PCMSK0 PCINT7 PCINT6 PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 71
(0x6A) Reserved - - - - - - - -
(0x69) EICRA - - ISC21 ISC20 ISC11 ISC10 ISC01 ISC00 67
(0x68) PCICR - - - - PCIE3 PCIE2 PCIE1 PCIE0 69
(0x67) Reserved - - - - - - - -
(0x66) OSCCAL Oscillator Calibration Register 40
(0x65) Reserved - - - - - - - -
(0x64) PRR PRTWI PRTIM2 PRTIM0 PRUSART1 PRTIM1 PRSPI PRUSART0 PRADC 48
(0x63) Reserved - - - - - - - -
(0x62) Reserved - - - - - - - -
(0x61) CLKPR CLKPCE - - - CLKPS3 CLKPS2 CLKPS1 CLKPS0 40
(0x60) WDTCSR WDIF WDIE WDP3 WDCE WDE WDP2 WDP1 WDP0 59
0x3F (0x5F) SREG I T H S V N Z C 11
0x3E (0x5E) SPH SP15 SP14 SP13 SP12 SP11 SP10 SP9 SP8 12
0x3D (0x5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 12
0x3C (0x5C) Reserved - - - - - - - -
0x3B (0x5B) Reserved - - - - - - - -
0x3A (0x5A) Reserved - - - - - - - -
0x39 (0x59) Reserved - - - - - - - -
0x38 (0x58) Reserved - - - - - - - -
0x37 (0x57) SPMCSR SPMIE RWWSB SIGRD RWWSRE BLBSET PGWRT PGERS SPMEN 295
0x36 (0x56) Reserved - - - - - - - -
0x35 (0x55) MCUCR JTD BODS
0x34 (0x54) MCUSR - - - JTRF WDRF BORF EXTRF PORF 58/278
0x33 (0x53) SMCR - - - - SM2 SM1 SM0 SE 47
0x32 (0x52) Reserved
0x31 (0x51) OCDR On-Chip Debug Register 268
0x30 (0x50) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 260
0x2F (0x4F) Reserved - - - - - - - -
0x2E (0x4E) SPDR SPI 0 Data Register 173
0x2D (0x4D) SPSR SPIF0 WCOL0 - - - - -SPI2X0172
0x2C (0x4C) SPCR SPIE0 SPE0 DORD0 MSTR0 CPOL0 CPHA0 SPR01 SPR00 171
0x2B (0x4B) GPIOR2 General Purpose I/O Register 2 29
0x2A (0x4A) GPIOR1 General Purpose I/O Register 1 29
0x29 (0x49) Reserved - - - - - - - -
0x28 (0x48) OCR0B Timer/Counter0 Output Compare Register B 108
0x27 (0x47) OCR0A Timer/Counter0 Output Compare Register A 108
0x26 (0x46) TCNT0 Timer/Counter0 (8 Bit) 108
0x25 (0x45) TCCR0B FOC0A FOC0B
0x24 (0x44) TCCR0A COM0A1 COM0A0 COM0B1 COM0B0
0x23 (0x43) GTCCR TSM - - - - - PSRASY PSRSYNC 163
0x22 (0x42) EEARH
0x21 (0x41) EEARL EEPROM Address Register Low Byte 24
0x20 (0x40) EEDR EEPROM Data Register 24
0x1F (0x3F) EECR - - EEPM1 EEPM0 EERIE EEMPE EEPE EERE 24
0x1E (0x3E) GPIOR0 General Purpose I/O Register 0 29
0x1D (0x3D) EIMSK
- - - - - - - -
- - - - EEPROM Address Register High Byte 24
- - - - - INT2 INT1 INT0 68
(6)
(6)
BODSE
- - WGM02 CS02 CS01 CS00 107
PUD - - IVSEL IVCE 91/278
- -WGM01WGM00108
8272CS–AVR–06/11
12
ATmega164A/PA/324A/PA/644A/PA/1284/P
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
0x1C (0x3C) EIFR - - - - - INTF2 INTF1 INTF0 68
0x1B (0x3B) PCIFR - - - - PCIF3 PCIF2 PCIF1 PCIF0 69
0x1A (0x3A) Reserved - - - - - - - -
0x19 (0x39) Reserved - - - - - - - -
0x18 (0x38) TIFR3 - -ICF3 - -OCF3B OCF3ATOV3140
0x17 (0x37) TIFR2
0x16 (0x36) TIFR1
0x15 (0x35) TIFR0 - - - - -OCF0B OCF0ATOV0109
0x14 (0x34) Reserved - - - - - - - -
0x13 (0x33) Reserved - - - - - - - -
0x12 (0x32) Reserved - - - - - - - -
0x11 (0x31) Reserved - - - - - - - -
0x10 (0x30) Reserved - - - - - - - -
0x0F (0x2F) Reserved - - - - - - - -
0x0E (0x2E) Reserved - - - - - - - -
0x0D (0x2D) Reserved - - - - - - - -
0x0C (0x2C) Reserved - - - - - - - -
0x0B (0x2B) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 92
0x0A (0x2A) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 92
0x09 (0x29) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 92
0x08 (0x28) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 92
0x07 (0x27) DDRC DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0 92
0x06 (0x26) PINC PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0 92
0x05 (0x25) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 91
0x04 (0x24) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 91
0x03 (0x23) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 91
0x02 (0x22) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 91
0x01 (0x21) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 91
0x00 (0x20) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 91
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 reg-
isters, 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 regis-
ters as data space using LD and ST instructions, $20 must be added to these addresses.
The ATmega164A/164PA/324A/324PA/644A/644PA/1284/1284P 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 - $FF, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
5. USART in SPI Master Mode.
6. Only available in the ATmega164PA/324PA/644PA/1284P.
- - - - -OCF2B OCF2ATOV2162
- -ICF1 - -OCF1B OCF1ATOV1139
8272CS–AVR–06/11
13
ATmega164A/PA/324A/PA/644A/PA/1284/P
8. 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) << 1 Z,C 2
FMULS Rd, Rr Fractional Multiply Signed R1:R0 ← (Rd x Rr) << 1 Z,C 2
FMULSU Rd, Rr Fractional Multiply Signed with Unsigned R1:R0 ← (Rd x Rr) << 1 Z,C 2
BRANCH INSTRUCTIONS
RJMP k Relative Jump PC ← PC + k + 1 None 2
IJMP Indirect Jump to (Z) PC ← Z None 2
JMP k Direct Jump PC ← kNone3
RCALL k Relative Subroutine Call PC ← PC + k + 1 None 4
ICALL Indirect Call to (Z) PC ← ZNone4
CALL k Direct Subroutine Call PC ← kNone5
RET Subroutine Return PC ← STACK None 5
RETI Interrupt Return PC ← STACK I 5
CPSE Rd,Rr Compare, Skip if Equal if (Rd = Rr) PC ← PC + 2 or 3 None 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 1
SBRC Rr, b Skip if Bit in Register Cleared if (Rr(b)=0) PC ← PC + 2 or 3 None 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
SBIS P, b Skip if Bit in I/O Register is Set if (P(b)=1) PC ← PC + 2 or 3 None 1/2/3
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
BRGE k Branch if Greater or Equal, Signed if (N ⊕ V= 0) then PC ← PC + k + 1 None 1/2
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
BRHC k Branch if Half Carry Flag Cleared if (H = 0) then PC ← PC + k + 1 None 1/2
BRTS k Branch if T Flag Set if (T = 1) then PC ←
BRTC k Branch if T Flag Cleared if (T = 0) then PC ← PC + k + 1 None 1/2
BRVS k Branch if Overflow Flag is Set if (V = 1) then PC ← PC + k + 1 None 1/2
PC + k + 1 None 1/2
8272CS–AVR–06/11
14
ATmega164A/PA/324A/PA/644A/PA/1284/P
Mnemonics Operands Description Operation Flags #Clocks
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) ← 1None2
CBI P,b Clear Bit in I/O Register I/O(P,b) ← 0None2
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) ← TNone1
SEC Set Carry C ← 1C1
CLC Clear Carry C ← 0 C 1
SEN Set Negative Flag N ← 1N1
CLN Clear Negative Flag N ← 0 N 1
SEZ Set Zero Flag Z ← 1Z1
CLZ Clear Zero Flag Z ← 0 Z 1
SEI Global Interrupt Enable I ← 1I1
CLI Global Interrupt Disable I ← 0 I 1
SES Set Signed Test Flag S ← 1S1
CLS Clear Signed Test Flag S ← 0 S 1
SEV Set Twos Complement Overflow. V ← 1V1
CLV Clear Twos Complement Overflow V ← 0 V 1
SET Set T in SREG T ← 1T1
CLT Clear T in SREG T ← 0 T 1
SEH Set Half Carry Flag in SREG H ← 1H1
CLH Clear Half Carry Flag in SREG H ← 0 H 1
DATA TRANSFER INSTRUCTIONS
MOV Rd, Rr Move Between Registers Rd ← Rr None 1
MOVW Rd, Rr Copy Register Word
LDI Rd, K Load Immediate Rd ← KNone1
LD Rd, X Load Indirect Rd ← (X) None 2
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
LD Rd, - Y Load Indirect and Pre-Dec. Y ← Y - 1, Rd ← (Y) None 2
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
LDD Rd, Z+q Load Indirect with Displacement Rd ← (Z + q) None 2
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
ST Y, Rr Store Indirect (Y) ← Rr None 2
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
LPM Load Program Memory R0 ← (Z) None 3
LPM Rd, Z Load Program Memory Rd ← (Z) None 3
LPM Rd, Z+ Load Program Memory and Post-Inc Rd ← (Z), Z ← Z+1 None 3
SPM Store Program Memory (Z) ← R1:R0 None -
IN Rd, P In Port Rd ← PNone1
OUT P, Rr Out Port P ← Rr None 1
Rd+1:Rd ← Rr+1:Rr
None 1
8272CS–AVR–06/11
15
ATmega164A/PA/324A/PA/644A/PA/1284/P
Mnemonics Operands Description Operation Flags #Clocks
PUSH Rr Push Register on Stack STACK ← Rr None 2
POP Rd Pop Register from Stack Rd ← STACK None 2
MCU CONTROL INSTRUCTIONS
NOP No Operation None 1
SLEEP Sleep (see specific descr. for Sleep function) None 1
WDR Watchdog Reset (see specific descr. for WDR/timer) None 1
BREAK Break For On-chip Debug Only None N/A
8272CS–AVR–06/11
16
9. Ordering Information
9.1 ATmega164A
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega164A-AU
ATmega164A-AUR
ATmega164A-PU
ATmega164A-MU
ATmega164A-MUR
ATmega164A-MCH
ATmega164A-MCHR
ATmega164A-CU
ATmega164A-CUR
(2)
(5)
Package
44A
44A
(1)
Operational Range
40P6
(5)
(4)
(5)
(4)(5)
44M1
44M1
44MC
44MC
49C2
49C2
Industrial
o
(-40
C to 85oC)
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. NiPdAu Lead Finish.
5. Tape & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Thermally Enhanced Plastic Very Thin Quad Flat No-Lead (VQFN)
44MC 44-lead (2-row Staggered), 5 x 5 x 1.0 mm body, 2.60 x 2.60 mm Exposed Pad, Quad Flat No-Lead Package (QFN)
49C2 49-ball, (7 x 7 Array) 0.65 mm Pitch, 5 x 5 x 1 mm, Very Thin, Fine-Pitch Ball Grid Array Package (VFBGA)
8272CS–AVR–06/11
17
9.2 ATmega164PA
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega164PA-AU
ATmega164PA-AUR
ATmega164PA-PU
ATmega164PA-MU
ATmega164PA-MUR
ATmega164PA-MCH
ATmega164PA-MCHR
ATmega164PA-CU
ATmega164PA-CUR
(2)
(5)
Package
44A
44A
(1)
Operational Range
40P6
(5)
(4)
(4)(5)
(5)
44M1
44M1
44MC
44MC
49C2
49C2
Industrial
o
(-40
C to 85oC)
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. NiPdAu Lead Finish.
5. Tape & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Thermally Enhanced Plastic Very Thin Quad Flat No-Lead (VQFN)
44MC 44-lead (2-row Staggered), 5 x 5 x 1.0 mm body, 2.60 x 2.60 mm Exposed Pad, Quad Flat No-Lead Package (QFN)
49C2 49-ball, (7 x 7 Array) 0.65 mm Pitch, 5 x 5 x 1 mm, Very Thin, Fine-Pitch Ball Grid Array Package (VFBGA)
8272CS–AVR–06/11
18
9.3 ATmega324A
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega324A-AU
ATmega324A-AUR
ATmega324A-PU
ATmega324A-MU
ATmega324A-MUR
ATmega324A-MCH
ATmega324A-MCHR
ATmega324A-CU
ATmega324A-CUR
(2)
(5)
Package
44A
44A
(1)
Operational Range
40P6
(5)
(4)
(5)
(4)(5)
44M1
44M1
44MC
44MC
49C2
49C2
Industrial
o
(-40
C to 85oC)
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. NiPdAu Lead Finish.
5. Tape & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Thermally Enhanced Plastic Very Thin Quad Flat No-Lead (VQFN)
44MC 44-lead (2-row Staggered), 5 x 5 x 1.0 mm body, 2.60 x 2.60 mm Exposed Pad, Quad Flat No-Lead Package (QFN)
49C2 49-ball, (7 x 7 Array) 0.65 mm Pitch, 5 x 5 x 1 mm, Very Thin, Fine-Pitch Ball Grid Array Package (VFBGA)
8272CS–AVR–06/11
19
9.4 ATmega324PA
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega324PA-AU
ATmega324PA-AUR
ATmega324PA-PU
ATmega324PA-MU
ATmega324PA-MUR
ATmega324PA-MCH
ATmega324PA-MCHR
ATmega324PA-CU
ATmega324PA-CUR
(2)
(5)
Package
44A
44A
(1)
Operational Range
40P6
(5)
(4)
(4)(5)
(5)
44M1
44M1
44MC
44MC
49C2
49C2
Industrial
o
(-40
C to 85oC)
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. NiPdAu Lead Finish.
5. Tape & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Thermally Enhanced Plastic Very Thin Quad Flat No-Lead (VQFN)
44MC 44-lead (2-row Staggered), 5 x 5 x 1.0 mm body, 2.60 x 2.60 mm Exposed Pad, Quad Flat No-Lead Package (QFN)
49C2 49-ball, (7 x 7 Array) 0.65 mm Pitch, 5 x 5 x 1 mm, Very Thin, Fine-Pitch Ball Grid Array Package (VFBGA)
8272CS–AVR–06/11
20
9.5 ATmega644A
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega644A-AU
ATmega644A-AUR
ATmega644A-PU
ATmega644A-MU
ATmega644A-MUR
(2)
(4)
Package
44A
44A
40P6
(4)
44M1
44M1
(1)
Operational Range
Industrial
o
C to 85oC)
(-40
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. Taper & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Thermally Enhanced Plastic Very Thin Quad Flat No-Lead (VQFN)
8272CS–AVR–06/11
21
9.6 ATmega644PA
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega644PA-AU
ATmega644PA-AUR
ATmega644PA-PU
ATmega644PA-MU
ATmega644PA-MUR
(2)
(4)
Package
44A
44A
40P6
(4)
44M1
44M1
(1)
Operational Range
Industrial
o
C to 85oC)
(-40
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. Taper & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Thermally Enhanced Plastic Very Thin Quad Flat No-Lead (VQFN)
8272CS–AVR–06/11
22
9.7 ATmega1284
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega1284-AU
ATmega1284-AUR
ATmega1284-PU
ATmega1284-MU
ATmega1284-MUR
(2)
(4)
Package
44A
44A
40P6
(4)
44M1
44M1
(1)
Operational Range
Industrial
o
C to 85oC)
(-40
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. Tape & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)
8272CS–AVR–06/11
23
9.8 ATmega1284P
ATmega164A/PA/324A/PA/644A/PA/1284/P
Speed (MHz)
(3)
20 1.8 - 5.5V
Power Supply Ordering Code
ATmega1284P-AU
ATmega1284P-AUR
ATmega1284P-PU
ATmega1284P-MU
ATmega1284P-MUR
(2)
(4)
Package
44A
44A
40P6
(4)
44M1
44M1
(1)
Operational Range
Industrial
o
C to 85oC)
(-40
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, complies to the European Directive for Restriction of Hazardous Substances (RoHS directive). Also
Halide free and fully Green.
3. For Speed vs. V
see ”Speed Grades” on page 335.
CC
4. Tape & Reel.
Package Type
44A 44-lead, Thin (1.0 mm) Plastic Gull Wing Quad Flat Package (TQFP)
40P6 40-pin, 0.600” Wide, Plastic Dual Inline Package (PDIP)
44M1 44-pad, 7 x 7 x 1.0 mm body, lead pitch 0.50 mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)
8272CS–AVR–06/11
24
10. Packaging Information
2325 Orchard Parkway
San Jose, CA 95131
TITLE
DRAWING NO.
R
REV.
44A, 44-lead, 10 x 10 mm Body Size, 1.0 mm Body Thickness,
0.8 mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)
C
44A
2010-10-20
PIN 1 IDENTIFIER
0°~7°
PIN 1
L
C
A1
A2 A
D1
D
e
E1 E
B
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
Notes:
1. This package conforms to JEDEC reference MS-026, Variation ACB.
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.
A – – 1.20
A1 0.05 – 0.15
A2 0.95 1.00 1.05
D 11.75 12.00 12.25
D1 9.90 10.00 10.10 Note 2
E 11.75 12.00 12.25
E1 9.90 10.00 10.10 Note 2
B 0.30 – 0.45
C 0.09 – 0.20
L 0.45 – 0.75
e 0.80 TYP
10.1 44A
ATmega164A/PA/324A/PA/644A/PA/1284/P
8272CS–AVR–06/11
25
10.2 40P6
2325 Orchard Parkway
San Jose, CA 95131
TITLE
DRAWING NO.
R
REV.
40P6, 40-lead (0.600"/15.24 mm Wide) Plastic Dual
Inline Package (PDIP)
B
40P6
09/28/01
PIN
1
E1
A1
B
REF
E
B1
C
L
SEATING PLANE
A
0º ~ 15º
D
e
eB
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
A – – 4.826
A1 0.381 – –
D 52.070 – 52.578 Note 2
E 15.240 – 15.875
E1 13.462 – 13.970 Note 2
B 0.356 – 0.559
B1 1.041 – 1.651
L 3.048 – 3.556
C 0.203 – 0.381
eB 15.494 – 17.526
e 2.540 TYP
Notes: 1. This package conforms to JEDEC reference MS-011, Variation AC.
2. Dimensions D and E1 do not include mold Flash or Protrusion.
Mold Flash or Protrusion shall not exceed 0.25 mm (0.010").
ATmega164A/PA/324A/PA/644A/PA/1284/P
8272CS–AVR–06/11
26
10.3 44M1
TITLE
DRAWING NO.GPC
REV.
Package Drawing Contact:
packagedrawings@atmel.com
44M1ZWS H
44M1, 44-pad, 7 x 7 x 1.0 mm Body, Lead
Pitch 0.50 mm, 5.20 mm Exposed Pad, Thermally
Enhanced Plastic Very Thin Quad Flat No
Lead Package (VQFN)
9/26/08
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
A 0.80 0.90 1.00
A1 – 0.02 0.05
A3 0.20 REF
b 0.18 0.23 0.30
D
D2 5.00 5.20 5.40
6.90 7.00 7.10
6.90 7.00 7.10
E
E2 5.00 5.20 5.40
e 0.50 BSC
L 0.59 0.64 0.69
K 0.20 0.26 0.41
Note: JEDEC Standard MO-220, Fig. 1 (SAW Singulation) VKKD-3.
TOP VIEW
SIDE VIEW
BOTTOM VIEW
D
E
Marked Pin# 1 ID
E2
D2
b
e
Pin #1 Corner
L
A1
A3
A
SEATING PLANE
Pin #1
Triangle
Pin #1
Chamfer
(C 0.30)
Option A
Option B
Pin #1
Notch
(0.20 R)
Option C
K
K
1
2
3
ATmega164A/PA/324A/PA/644A/PA/1284/P
8272CS–AVR–06/11
27
10.4 44MC
TITLE
DRA WING NO .
REV .
Package Drawing Contact:
packagedrawings@atmel.com
44MC A
9/13/07
D2
E2
L
L
B15
A18
B11
A13
B10
A12
B6
A7
A6
B5
B1
B20
A1
A24
eT
L
b
R0.20
0.40
eR
A19
B16
eT/2
SIDE VIEW
A1
A
y
C
D
E
Pin 1 ID
TOP VIEW
BOTTOM VIEW
Note:
1. The terminal #1 ID is a Laser-marked Feature.
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
N O T E
A 0.80 0.90 1.00
A1 0.00 0.02 0.05
b 0.18 0.23 0.30
C 0.20 REF
D 4.90 5.00 5.10
D2 2.55 2.60 2.65
E 4.90 5.00 5.10
E2 2.55 2.60 2.65
eT – 0.70 –
eR – 0.40 –
K 0.45 – –
L 0.30 0.35 0.40
y 0.00 – 0.075
44MC, 44QFN (2-Row Staggered), 5 x 5 x 1.00 mm Body,
2.60 x 2.60 mm Exposed Pad, Quad Flat No Lead Package
ATmega164A/PA/324A/PA/644A/PA/1284/P
8272CS–AVR–06/11
28
10.5 49C2
TITLE
DRAWING NO.GPC
REV.
Package Drawing Contact:
packagedrawings@atmel.com
49C2CBD A
49C2, 49-ball (7 x 7 Array), 0.65 mm Pitch,
5.0 x 5.0 x 1.0 mm, Very Thin, Fine-Pitch
Ball Grid Array Package (VFBGA)
3/14/08
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
A – – 1.00
A1 0.20 – –
A2 0.65 – –
D 4.90 5.00 5.10
D1 3.90 BSC
E 4.90 5.00 5.10
E1 3.90 BSC
b 0.30 0.35 0.40
e 0.65 BSC
TOP VIEW
SIDE VIEW
A1 BALL ID
G
F
E
D
C
B
A
12 3 4 5 6
7
A
A1
A2
D
E
0.10
E1
D1
49 - Ø0.35 ± 0.05
e
A1 BALL CORNER
BOTTOM VIEW
b e
ATmega164A/PA/324A/PA/644A/PA/1284/P
8272CS–AVR–06/11
29
11. Errata
11.1 Errata for ATmega164A
11.1.1 Rev. E
No known Errata.
11.2 Errata for ATmega164PA
11.2.1 Rev. E
No known Errata.
11.3 Errata for ATmega324A
11.3.1 Rev. F
No known Errata.
11.4 Errata for ATmega324PA
11.4.1 Rev. F
ATmega164A/PA/324A/PA/644A/PA/1284/P
No known Errata.
11.5 Errata for ATmega644A
11.5.1 Rev. F
No known Errata.
11.6 Errata for ATmega644PA
11.6.1 Rev. F
No known Errata.
11.7 Errata for ATmega1284
11.7.1 Rev. B
No known Errata.
11.8 Errata for ATmega1284P
11.8.1 Rev. B
No known Errata.
8272CS–AVR–06/11
30
ATmega164A/PA/324A/PA/644A/PA/1284/P
12. Datasheet Revision History
Please note that the referring page numbers in this section are referred to this document. The
referring revision in this section are referring to the document revision.
12.1 Rev. 8272C - 06/11
1. Updated ”ATmega1284P DC Characteristics” on page 334.
12.2 Rev. 8272B - 05/11
1. Added Atmel QTouch Library Support and QTouch Sensing Capability Features.
2. Replaced Figure 1-1 on page 2 by an updated “Pinout” that includes Timer/Counter3.
3. Replaced Figure 7-1 on page 10 by an updated “Block Diagram of the AVR Architecture” that
includes Timer/Counter3.
4. Added ”RAMPZ – Extended Z-pointer Register for ELPM/SPM
5. Added ”PRR1 – Power Reduction Register 1” on page 49.
6. Renamed PRR to ”PRR0 – Power Reduction Register 0” on page 48.
7. Updated ”PCIFR – Pin Change Interrupt Flag Register” on page 69. PCICR replaces EIMSR in
the PCIF3, PCIF2, PCIF1 and PCIF0 bit description.
8. Updated ”PCMSK3 – Pin Change Mask Register 3” on page 70. PCIE3 replaces PCIE2 in the bit
description.
9. Updated ”Alternate Functions of Port B” on page 82 to include Timer/Counter3
10. Updated ”Alternate Functions of Port D” on page 88 to include Timer/Counter3
(1)
” on page 15.
11. Added ”TCNT3H and TCNT3L –Timer/Counter3” on page 136
12. Added ”OCR3AH and OCR3AL – Output Compare Register3 A” on page 137
13. Added ”OCR3BH and OCR3BL – Output Compare Register3 B” on page 137
14. Added ”TIMSK3 – Timer/Counter3 Interrupt Mask Register” on page 139
15. Updated All “SPI – Serial Peripheral Interface” “Register Description” to reflect ATmega1284 and
ATmega1284P.
16. Updated ”Addressing the Flash During Self-Programming” on page 284 to include RAMPZ
register.
17. Updated Table 27-16 on page 314. t
18. BODS and BODSE bits denoted as R/W
19. Description of external pin modes below table 16-9 removed.
20. Updated ”Register Summary” on page 10 to include Timer/Counter3.
21. Updated the datasheet with Atmel new style guide.
WD_EEPROM
is 3.6ms instead of 9ms.
8272CS–AVR–06/11
31
12.3 Rev. 8272A - 01/10
1. Initial revision (Based on ATmega164PA/324PA/644PA/1284P datasheet 8252G-AVR-11/09 and
2. Changes done:
ATmega164A/PA/324A/PA/644A/PA/1284/P
on ATmega644 datasheet 2593N-AVR-09/09).
– Non-picoPower devices added: ATmega164A/324A/644A/1284
– Updated Table 2-1 on page 7
– Updated Table 10-1 on page 42
(1)
– Updated ”Sleep Modes” on page 42 and ”BOD Disable
– Updated ”Register Description” on page 67
– Updated ”USART” on page 174 and ”USART in SPI Mode” on page 201
– Updated ”Signature Bytes” on page 300 and ”Page Size” on page 300
– Added ”DC Characteristics” on page 329 for non-picoPower devices.
– Added ”ATmega164A Typical Characteristics” on page 345
– Added ”ATmega324A Typical Characteristics” on page 397
– Added ”ATmega644A Typical Characteristics” on page 449
– Added ”ATmega1284 Typical Characteristics” on page 501
” on page 43
– Added ”Ordering Information” on page 17 for non-picoPower devices
– Added ”Errata for ATmega164A” on page 30
– Added ”Errata for ATmega324A” on page 30
– Added ”Errata for ATmega644PA” on page 30
– Added ”Errata for ATmega1284” on page 30
8272CS–AVR–06/11
32
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131
USA
Tel: (+1)(408) 441-0311
Fax: (+1)(408) 487-2600
www.atmel.com
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Fax: (+852) 2722-1369
© 2011 Atmel Corporation. All rights reserved.
®
Atmel
, Atmel logo and combinations thereof, AVR®, QTouch®, QMatrix®, AVR Studio® and others are registered trademarks or trade-
marks of Atmel Corporation or its subsidiaries. Windows
®
and others are registered trademarks of Microsoft Corporation in U.S. and
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Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to
any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL
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8272CS–AVR–06/11
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