ATMEGA329P-20AUR - MICROCHIP TECHNOLOGY

Atmel-8285FS-AVR-ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P-Datasheet_08/2014

Features

•High performance, low power Atmel® AVR® 8-Bit Microcontroller

•Advanced RISC architecture

– 130 powerful instructions – most single clock cycle execution

– 32 × 8 general purpose working registers

– Fully static operation

– Up to 16MIPS throughput at 16MHz (Atmel ATmega165PA/645P)

– Up to 20MIPS throughput at 20MHz (Atmel

ATmega165A/325A/325PA/645A/3250A/3250PA/6450A/6450P)

– On-chip 2-cycle multiplier

•High endurance non-volatile memory segments

– In-system self-programmable flash program memory

• 16KBytes (ATmega165A/ATmega165PA)

• 32KBytes (ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA)

• 64KBytes (ATmega645A/ATmega645P/ATmega6450A/ATmega6450P)

– EEPROM

• 512Bytes (ATmega165A/ATmega165PA)

• 1Kbytes (ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA)

• 2Kbytes (ATmega645A/ATmega645P/ATmega6450A/ATmega6450P)

– Internal SRAM

• 1KBytes (ATmega165A/ATmega165PA)

• 2KBytes (ATmega325A/ATmega325PA/ATmega3250A/ATmega3250PA)

• 4KBytes (ATmega645A/ATmega645P/ATmega6450A/ATmega6450P)

– Write/erase cycles: 10,000 flash/100,000 EEPROM

– Data retention: 20 years at 85°C/100 years at 25°C (1)

– 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

•Atmel QTouch® library support

– Capacitive touch buttons, sliders and wheels

– Atmel QTouch and QMatrix acquisition

– Up to 64 sense channels

•JTAG (IEEE std. 1149.1 compliant) interface

– Boundary-scan capabilities according to the JTAG standard

– Extensive on-chip debug support

– Programming of Flash, EEPROM, Fuses, and Lock Bits through the JTAG Interface

•Peripheral Features

– Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode

– 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

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P

8-bit Atmel Microcontroller with 16/32/64KB In-System Programmable Flash

DATASHEET SUMMARY

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

– 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

– 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

– 54/69 programmable I/O lines

– 64/100-lead TQFP, 64-pad QFN/MLF and 64-pad DRQFN

•Speed grade:

– ATmega 165A/165PA/645A/645P: 0 - 16MHz @ 1.8 - 5.5V

– ATmega325A/325PA/3250A/3250PA/6450A/6450P: 0 - 20MHz @ 1.8 - 5.5V

•Temperature range:

– -40°C to 85°C industrial

•Ultra-low power consumption (picoPower® devices)

– Active mode:

• 1MHz, 1.8V: 215µA

• 32kHz, 1.8V: 8µA (including oscillator)

– Power-down mode: 0.1µA at 1.8V

– Power-save mode: 0.6µA at 1.8V (Including 32kHz RTC)

Note: 1. 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.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

1. Pin configurations

1.1 Pinout - TQFP and QFN/MLF

Figure 1-1. 64A (TQFP)and 64M1 (QFN/MLF) pinout Atmel

ATmega165A/ATmega165PA/ATmega325A/ATmega325PA/ATmega645A/ATmega645P.

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 mechanical stability. If the center pad is left unconnected, the package might

loosen from the board.

PC0

VCC

GND

PF0 (ADC0)

PF7 (ADC7/TDI)

PF1 (ADC1)

PF2 (ADC2)

PF3 (ADC3)

PF4 (ADC4/TCK)

PF5 (ADC5/TMS)

PF6 (ADC6/TDO)

AREF

GND

AVCC

(RXD/PCINT0) PE0

(TXD/PCINT1) PE1

DNC

(XCK/AIN0/PCINT2) PE2

(AIN1/PCINT3) PE3

(USCK/SCL/PCINT4) PE4

(DI/SDA/PCINT5) PE5

(DO/PCINT6) PE6

(CLKO/PCINT7) PE7

(SS/PCINT8) PB0

(SCK/PCINT9) PB1

(MOSI/PCINT10) PB2

(MISO/PCINT11) PB3

(OC0A/PCINT12) PB4

(OC2A/PCINT15) PB7

(T1) PG3

(OC1B/PCINT14) PB6

(T0) PG4

(OC1A/PCINT13) PB5

PC1

PG0

PD7

PC2

PC3

PC4

PC5

PC6

PC7

PA7

PG2

PA6

PA5

PA4

PA3

PA0

PA1

PA2

PG1

PD6

PD5

PD4

PD3

PD2

(INT0) PD1

(ICP1) PD0

(TOSC1) XTAL1

(TOSC2) XTAL2

RESET/PG5

GND

VCC

INDEX CORNER

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

1.2 Pinout - 100A (TQFP)

Figure 1-2. Pinout Atmel ATmega3250A/ATmega3250PA/ATmega6450A/ATmega6450P.

(OC2A/PCINT15) PB7

DNC

(T1) PG3

(T0) PG4

RESET/PG5

VCC

GND

(TOSC2) XTAL2

(TOSC1) XTAL1

DNC

(PCINT26) PJ2

(PCINT27) PJ3

(PCINT28) PJ4

(PCINT29) PJ5

(PCINT30) PJ6

DNC

(ICP1) PD0

(INT0) PD1

PD2

PD3

PD4

PD5

PD6

PD7

AVCC

AGND

AREF

PF0 (ADC0)

PF1 (ADC1)

PF2 (ADC2)

PF3 (ADC3)

PF4 (ADC4/TCK)

PF5 (ADC5/TMS)

PF6 (ADC6/TDO)

PF7 (ADC7/TDI)

DNC

PH7 (PCINT23)

PH6 (PCINT22)

PH5 (PCINT21)

PH4 (PCINT20)

DNC

GND

VCC

DNC

PA0

PA1

PA2

PA3

PA4

PA 5

PA6

PA7

PG2

PC7

PC6

DNC

PH3 (PCINT19)

PH2 (PCINT18)

PH1 (PCINT17)

PH0 (PCINT16)

DNC

PC5

PC4

PC3

PC2

PC1

PC0

PG1

PG0

INDEX CORNER

100

DNC

(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

GND

DNC

(PCINT24) PJ0

(PCINT25) PJ1

DNC

(SS/PCINT8) PB0

(SCK/PCINT9) PB1

(MOSI/PCINT10) PB2

(MISO/PCINT11) PB3

(OC0A/PCINT12) PB4

(OC1A/PCINT13) PB5

(OC1B/PCINT14) PB6

TQFP

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

2. Overview

The Atmel ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P is a low-power CMOS 8-bit

microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock

cycle, this microcontroller 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.

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.

PROGRAM

COUNTER

INTERNAL

OSCILLATOR

WATCHDOG

TIMER

STACK

POINTER

PROGRAM

FLASH

MCU CONTROL

SRAM

GENERAL

PURPOSE

REGISTERS

INSTRUCTION

TIMER/

COUNTERS

INSTRUCTION

DECODER

DATA DIR.

REG. PORTB

DATA DIR.

REG. PORTE

DATA DIR.

REG. PORTA

DATA DIR.

REG. PORTD

DATA REGISTER

PORTB

DATA REGISTER

PORTE

DATA REGISTER

PORTA

DATA REGISTER

PORTD

TIMING AND

CONTROL

OSCILLATOR

INTERRUPT

UNIT

EEPROM

SPI

USART

STATUS

ALU

PORTB DRIVERS

PORTE DRIVERS

PORTA DRIVERS

PORTF DRIVERS

PORTD DRIVERS

PORTC DRIVERS

PB0 - PB7PE0 - PE7

PA0 - PA7PF0 - PF7

VCCGND

XTAL1

XTAL2

CONTROL

LINES

ANALOG

COMPARATOR

PC0 - PC7

8-BIT DATA BUS

RESET

CALIB. OSC

DATA DIR.

REG. PORTC

DATA REGISTER

PORTC

ON-CHIP DEBUG

JTAG TAP

PROGRAMMING

LOGIC

BOUNDARY-

SCAN

DATA DIR.

REG. PORTF

DATA REGISTER

PORTF

ADC

PD0 - PD7

DATA DIR.

REG. PORTG

DATA REG.

PORTG

PORTG DRIVERS

PG0 - PG4

AGND

AREF

AVCC

UNIVERSAL

SERIAL INTERFACE

AVR CPU

PORTH DRIVERS

PH0 - PH7

DATA DIR.

REG. PORTH

DATA REGISTER

PORTH

PORTJ DRIVERS

PJ0 PJ6

DATA DIR.

REG. PORTJ

DATA REGISTER

PORTJ

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

The Atmel ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P provides the following

features: 16K/32K/64K bytes of In-System Programmable Flash with Read-While-Write capabilities, 512/1K/2K

bytes EEPROM, 1K/2K/4K byte SRAM, 54/69 general purpose I/O lines, 32 general purpose working registers,

a JTAG interface for Boundary-scan, On-chip Debugging support and programming, 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 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 XTAL/resonator Oscillator is running while the rest of the device is sleeping.

This allows very fast start-up combined with low-power consumption.

Atmel offers the QTouch® library for embedding capacitive touch buttons, sliders and wheels 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.

The device is manufactured using Atmel’s high density non-volatile memory technology. The On-chip 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 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 devise is a powerful microcontroller that provides a highly flexible and cost effective

solution to many embedded control applications.

The ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P AVR is supported with a full

suite of program and system development tools including: C Compilers, Macro Assemblers, Program

Debugger/Simulators, In-Circuit Emulators, and Evaluation kits.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

2.2 Comparison between Atmel

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P

2.3 Pin descriptions

2.3.1 VCC

Digital supply voltage.

2.3.2 GND

Ground.

2.3.3 Port A (PA7:PA0)

Port A is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port A output

buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port A pins

that are externally pulled low will source current if the pull-up resistors are activated. The Port A pins are tri-

stated when a reset condition becomes active, even if the clock is not running.

Port A also serves the functions of various special features of the

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alternate functions of

Port B” on page 73.

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 has better driving capabilities than the other ports.

Port B also serves the functions of various special features of the

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alternate functions of

Port B” on page 73.

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 capability. As inputs, Port C pins

Table 2-1. Differences between: ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P.

Device Flash EEPROM RAM MHz

ATmega165A 16Kbyte 512Bytes 1Kbyte 16

ATmega165PA 16Kbyte 512Bytes 1Kbyte 16

ATmega325A 32Kbyte 1Kbyte 2Kbyte 20

ATmega325PA 32Kbyte 1Kbyte 2Kbyte 20

ATmega3250A 32Kbytes 1Kbyte 2Kbyte 20

ATmega3250PA 32Kbyte 1Kbyte 2Kbyte 20

ATmega645A 64Kbyte 2Kbyte 4Kbyte 16

ATmega645P 64Kbyte 2Kbyte 4Kbyte 16

ATmega6450A 64Kbyte 2Kbyte 4Kbyte 20

ATmega6450P 64Kbyte 2Kbyte 4Kbyte 20

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

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 Atmel

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alternate functions of

Port D” on page 75.

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

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alternate functions of

Port D” on page 75.

2.3.7 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

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on ”Alternate functions of

Port E” on page 76.

2.3.8 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 resistors on pins PF7(TDI), PF5(TMS),

and PF4(TCK) will be activated even if a reset occurs.

Port F also serves the functions of the JTAG interface, see ”Alternate functions of Port F” on page 78.

2.3.9 Port G (PG5:PG0)

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

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P as listed on page 80.

2.3.10 Port H (PH7:PH0)

Port H is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port H output

buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port H pins

that are externally pulled low will source current if the pull-up resistors are activated. The Port H pins are tri-

stated when a reset condition becomes active, even if the clock is not running.

Port H also serves the functions of various special features of the ATmega3250A/3250PA/6450A/6450P as

listed on page 81.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

2.3.11 Port J (PJ6:PJ0)

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 Atmel ATmega3250A/3250PA/6450A/6450P

as listed on page 83.

2.3.12 RESET

Reset input. A low level on this pin for longer than the minimum pulse length will generate a reset, even if the

clock is not running. The minimum pulse length is given in Table 28-13 on page 304. Shorter pulses are not

guaranteed to generate a reset.

2.3.13 XTAL1

Input to the inverting Oscillator amplifier and input to the internal clock operating circuit.

2.3.14 XTAL2

Output from the inverting Oscillator amplifier.

2.3.15 AVCC

AVCC is the supply voltage pin for Port F and the A/D Converter. It should be externally connected to VCC, even

if the ADC is not used. If the ADC is used, it should be connected to VCC through a low-pass filter.

2.3.16 AREF

This is the analog reference pin for the A/D Converter.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

3. Resources

A comprehensive set of development tools, application notes and datasheets are available for download on

http://www.atmel.com/avr.

4. 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.

5. About code examples

This documentation contains simple code examples that briefly show how to use various parts of the device. Be

aware that not all C compiler vendors include bit definitions in the header files and interrupt handling in C is

compiler dependent. Please confirm with the C compiler documentation for more details.

These code examples assume that the part specific header file is included before compilation. For I/O registers

located in extended I/O map, "IN", "OUT", "SBIS", "SBIC", "CBI", and "SBI" instructions must be replaced with

instructions that allow access to extended I/O. Typically "LDS" and "STS" combined with "SBRS", "SBRC",

"SBR", and "CBR".

6. Capacitive touch sensing

The Atmel QTouch Library provides a simple to use solution to realize touch sensitive interfaces on most Atmel

AVR microcontrollers. The QTouch Library includes support for the Atmel QTouch and QMatrix acquisition

methods.

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.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

7. Register Summary

Note: Registers with bold type only available in ATmega3250A/3250PA/6450A/6450P.

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) PORTJ - PORTJ6 PORTJ5 PORTJ4 PORTJ3 PORTJ2 PORTJ1 PORTJ0 88

(0xDC) DDRJ - DDJ6 DDJ5 DDJ4 DDJ3 DDJ2 DDJ1 DDJ0 88

(0xDB) PINJ - PINJ6 PINJ5 PINJ4 PINJ3 PINJ2 PINJ1 PINJ0 88

(0xDA) PORTH PORTH7 PORTH6 PORTH5 PORTH4 PORTH3 PORTH2 PORTH1 PORTH0 87

(0xD9) DDRH DDH7 DDH6 DDH5 DDH4 DDH3 DDH2 DDH1 DDH0 87

(0xD8) PINH PINH7 PINH6 PINH5 PINH4 PINH3 PINH2 PINH1 PINH0 88

(0xD7) Reserved --------

(0xD6) Reserved --------

(0xD5) Reserved --------

(0xD4) Reserved --------

(0xD3) Reserved --------

(0xD2) Reserved --------

(0xD1) Reserved --------

(0xD0) Reserved --------

(0xCF) Reserved --------

(0xCE) Reserved --------

(0xCD) Reserved --------

(0xCC) Reserved --------

(0xCB) Reserved --------

(0xCA) Reserved --------

(0xC9) Reserved --------

(0xC8) Reserved --------

(0xC7) Reserved --------

(0xC6) UDR0 USART0 Data Register 178

(0xC5) UBRR0H USART0 Baud Rate Register High 182

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

(0xC4) UBRR0L USART0 Baud Rate Register Low 182

(0xC3) Reserved --------

(0xC2) UCSR0C - UMSEL0 UPM01 UPM00 USBS0 UCSZ01 UCSZ00 UCPOL0 180

(0xC1) UCSR0B RXCIE0 TXCIE0 UDRIE0 RXEN0 TXEN0 UCSZ02 RXB80 TXB80 179

(0xC0) UCSR0A RXC0 TXC0 UDRE0 FE0 DOR0 UPE0 U2X0 MPCM0 178

(0xBF) Reserved --------

(0xBE) Reserved --------

(0xBD) Reserved --------

(0xBC) Reserved --------

(0xBB) Reserved --------

(0xBA) USIDR USI Data Register 190

(0xB9) USISR USISIF USIOIF USIPF USIDC USICNT3 USICNT2 USICNT1 USICNT0 190

(0xB8) USICR USISIE USIOIE USIWM1 USIWM0 USICS1 USICS0 USICLK USITC 191

(0xB7) Reserved --------

(0xB6) ASSR --- EXCLK AS2 TCN2UB OCR2UB TCR2UB 146

(0xB5) Reserved --------

(0xB4) Reserved --------

(0xB3) OCR2A Timer/Counter 2 Output Compare Register A 145

(0xB2) TCNT2 Timer/Counter2 144

(0xB1) Reserved --------

(0xB0) TCCR2A FOC2A WGM20 COM2A1 COM2A0 WGM21 CS22 CS21 CS20 143

(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) Reserved --------

(0x9A) Reserved --------

(0x99) Reserved --------

(0x98) Reserved --------

(0x97) Reserved --------

(0x96) Reserved --------

(0x95) Reserved --------

(0x94) Reserved --------

(0x93) Reserved --------

(0x92) Reserved --------

(0x91) Reserved --------

(0x90) Reserved --------

(0x8F) Reserved --------

(0x8E) Reserved --------

(0x8D) Reserved --------

(0x8C) Reserved --------

(0x8B) OCR1BH Timer/Counter1 Output Compare Register B High 126

(0x8A) OCR1BL Timer/Counter1 Output Compare Register B Low 126

(0x89) OCR1AH Timer/Counter1 Output Compare Register A High 126

(0x88) OCR1AL Timer/Counter1 Output Compare Register A Low 126

(0x87) ICR1H Timer/Counter1 Input Capture Register High 126

(0x86) ICR1L Timer/Counter1 Input Capture Register Low 126

(0x85) TCNT1H Timer/Counter1 High 126

(0x84) TCNT1L Timer/Counter1 Low 126

Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

(0x83) Reserved ––––––––

(0x82) TCCR1C FOC1A FOC1B ––––––125

(0x81) TCCR1B ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10 124

(0x80) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 ––WGM11WGM10122

(0x7F) DIDR1 ––––––AIN1DAIN0D197

(0x7E) DIDR0 ADC7D ADC6D ADC5D ADC4D ADC3D ADC2D ADC1D ADC0D 215

(0x7D) Reserved ––––––––

(0x7C) ADMUX REFS1 REFS0 ADLAR MUX4 MUX3 MUX2 MUX1 MUX0 211

(0x7B) ADCSRB –ACME––– ADTS2 ADTS1 ADTS0 214

(0x7A) ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 213

(0x79) ADCH ADC Data Register High 214

(0x78) ADCL ADC Data Register Low 214

(0x77) Reserved ––––––––

(0x76) Reserved ––––––––

(0x75) Reserved ––––––––

(0x74) Reserved ––––––––

(0x73) PCMSK3 –PCINT30 PCINT29 PCINT28 PCINT27 PCINT26 PCINT25 PCINT24 63

(0x72) Reserved ––––––––

(0x71) Reserved ––––––––

(0x70) TIMSK2 –––––– OCIE2A TOIE2 145

(0x6F) TIMSK1 –-ICIE1–– OCIE1B OCIE1A TOIE1 127

(0x6E) TIMSK0 –––––– OCIE0A TOIE0 101

(0x6D) PCMSK2 PCINT23 PCINT22 PCINT21 PCINT20 PCINT19 PCINT18 PCINT17 PCINT16 63

(0x6C) PCMSK1 PCINT15 PCINT14 PCINT13 PCINT12 PCINT11 PCINT10 PCINT9 PCINT8 63

(0x6B) PCMSK0 PCINT7 PCINT6 PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 63

(0x6A) Reserved ––––––––

(0x69) EICRA ––––––ISC01ISC0061

(0x68) Reserved ––––––––

(0x67) Reserved ––––––––

(0x66) OSCCAL Oscillator Calibration Register [CAL7:0] 36

(0x65) Reserved ––––––––

(0x64) PRR –––– PRTIM1 PRSPI PSUSART0 PRADC 43

(0x63) Reserved ––––––––

(0x62) Reserved ––––––––

(0x61) CLKPR CLKPCE ––– CLKPS3 CLKPS2 CLKPS1 CLKPS0 36

(0x60) WDTCR – – – WDCE WDE WDP2 WDP1 WDP0 50

0x3F (0x5F) SREG I T H S V N Z C 13

0x3E (0x5E) SPH Stack Pointer High 15

0x3D (0x5D) SPL Stack Pointer Low 15

0x3C (0x5C) Reserved ––––––––

0x3B (0x5B) Reserved ––––––––

0x3A (0x5A) Reserved ––––––––

0x39 (0x59) Reserved ––––––––

0x38 (0x58) Reserved ––––––––

0x37 (0x57) SPMCSR SPMIE RWWSB – RWWSRE BLBSET PGWRT PGERS SPMEN 262

0x36 (0x56) Reserved ––––––––

0x35 (0x55) MCUCR JTD BODS BODSE PUD –– IVSEL IVCE 58/85/247

0x34 (0x54) MCUSR – – – JTRF WDRF BORF EXTRF PORF 50

0x33 (0x53) SMCR ––––SM2SM1SM0SE50

0x32 (0x52) Reserved ––––––––

0x31 (0x51) OCDR IDRD/OCDR7 OCDR6 OCDR5 OCDR4 OCDR3 OCDR2 OCDR1 OCDR0 221

0x30 (0x50) ACSR ACD ACBG ACO ACI ACIE ACIC ACIS1 ACIS0 196

0x2F (0x4F) Reserved ––––––––

0x2E (0x4E) SPDR SPI Data Register 155

0x2D (0x4D) SPSR SPIF WCOL –––––SPI2X155

0x2C (0x4C) SPCR SPIE SPE DORD MSTR CPOL CPHA SPR1 SPR0 154

0x2B (0x4B) GPIOR2 General Purpose I/O Register 27

0x2A (0x4A) GPIOR1 General Purpose I/O Register 27

0x29 (0x49) Reserved ––––––––

0x28 (0x48) Reserved ––––––––

0x27 (0x47) OCR0A Timer/Counter0 Output Compare A 101

0x26 (0x46) TCNT0 Timer/Counter0 100

0x25 (0x45) Reserved ––––––––

0x24 (0x44) TCCR0A FOC0A WGM00 COM0A1 COM0A0 WGM01 CS02 CS01 CS00 98

0x23 (0x43) GTCCR TSM ––––– PSR2 PSR10 130/146

Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

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

ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P 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.

0x22 (0x42) EEARH ––––– EEPROM Address Register High 25

0x21 (0x41) EEARL EEPROM Address Register Low 25

0x20 (0x40) EEDR EEPROM Data Register 26

0x1F (0x3F) EECR –––– EERIE EEMWE EEWE EERE 26

0x1E (0x3E) GPIOR0 General Purpose I/O Register 27

0x1D (0x3D) EIMSK PCIE PCIE2 PCIE1 PCIE0 – – –INT061

0x1C (0x3C) EIFR PCIF3 PCIF2 PCIF1 PCIF0 – – – INTF0 62

0x1B (0x3B) Reserved ––––––––

0x1A (0x3A) Reserved ––––––––

0x19 (0x39) Reserved ––––––––

0x18 (0x38) Reserved ––––––––

0x17 (0x37) TIFR2 –––––– OCF2A TOV2 145

0x16 (0x36) TIFR1 ––ICF1–– OCF1B OCF1A TOV1 127

0x15 (0x35) TIFR0 –––––– OCF0A TOV0 130

0x14 (0x34) PORTG – – – PORTG4 PORTG3 PORTG2 PORTG1 PORTG0 87

0x13 (0x33) DDRG – – – DDG4 DDG3 DDG2 DDG1 DDG0 87

0x12 (0x32) PING –– PING5 PING4 PING3 PING2 PING1 PING0 87

0x11 (0x31) PORTF PORTF7 PORTF6 PORTF5 PORTF4 PORTF3 PORTF2 PORTF1 PORTF0 87

0x10 (0x30) DDRF DDF7 DDF6 DDF5 DDF4 DDF3 DDF2 DDF1 DDF0 87

0x0F (0x2F) PINF PINF7 PINF6 PINF5 PINF4 PINF3 PINF2 PINF1 PINF0 87

0x0E (0x2E) PORTE PORTE7 PORTE6 PORTE5 PORTE4 PORTE3 PORTE2 PORTE1 PORTE0 86

0x0D (0x2D) DDRE DDE7 DDE6 DDE5 DDE4 DDE3 DDE2 DDE1 DDE0 86

0x0C (0x2C) PINE PINE7 PINE6 PINE5 PINE4 PINE3 PINE2 PINE1 PINE0 87

0x0B (0x2B) PORTD PORTD7 PORTD6 PORTD5 PORTD4 PORTD3 PORTD2 PORTD1 PORTD0 86

0x0A (0x2A) DDRD DDD7 DDD6 DDD5 DDD4 DDD3 DDD2 DDD1 DDD0 86

0x09 (0x29) PIND PIND7 PIND6 PIND5 PIND4 PIND3 PIND2 PIND1 PIND0 86

0x08 (0x28) PORTC PORTC7 PORTC6 PORTC5 PORTC4 PORTC3 PORTC2 PORTC1 PORTC0 86

0x07 (0x27) DDRC DDC7 DDC6 DDC5 DDC4 DDC3 DDC2 DDC1 DDC0 86

0x06 (0x26) PINC PINC7 PINC6 PINC5 PINC4 PINC3 PINC2 PINC1 PINC0 86

0x05 (0x25) PORTB PORTB7 PORTB6 PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 85

0x04 (0x24) DDRB DDB7 DDB6 DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 85

0x03 (0x23) PINB PINB7 PINB6 PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 85

0x02 (0x22) PORTA PORTA7PORTA6PORTA5PORTA4PORTA3PORTA2PORTA1PORTA0 85

0x01 (0x21) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 85

0x00 (0x20) PINA PINA7 PINA6 PINA5 PINA4 PINA3 PINA2 PINA1 PINA0 85

Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

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 ← k None 3

RCALL k Relative Subroutine Call PC ← PC + k + 1 None 3

ICALL Indirect Call to (Z) PC ← Z None 3

CALL k Direct Subroutine Call PC ← k None 4

RET Subroutine Return PC ← STACK None 4

RETI Interrupt Return PC ← STACK I 4

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 ← PC + k + 1 None 1/2

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

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

BRVC k Branch if Overflow Flag is Cleared if (V = 0) then PC ← PC + k + 1 None 1/2

BRIE k Branch if Interrupt Enabled if ( I = 1) then PC ← PC + k + 1 None 1/2

BRID k Branch if Interrupt Disabled if ( I = 0) then PC ← PC + k + 1 None 1/2

BIT AND BIT-TEST INSTRUCTIONS

SBI P,b Set Bit in I/O Register I/O(P,b) ← 1 None 2

CBI P,b Clear Bit in I/O Register I/O(P,b) ← 0 None 2

LSL Rd Logical Shift Left Rd(n+1) ← Rd(n), Rd(0) ← 0 Z,C,N,V 1

LSR Rd Logical Shift Right Rd(n) ← Rd(n+1), Rd(7) ← 0 Z,C,N,V 1

ROL Rd Rotate Left Through Carry Rd(0)←C,Rd(n+1)← Rd(n),C←Rd(7) Z,C,N,V 1

ROR Rd Rotate Right Through Carry Rd(7)←C,Rd(n)← Rd(n+1),C←Rd(0) Z,C,N,V 1

ASR Rd Arithmetic Shift Right Rd(n) ← Rd(n+1), n=0..6 Z,C,N,V 1

SWAP Rd Swap Nibbles Rd(3..0)←Rd(7..4),Rd(7..4)←Rd(3..0) None 1

BSET s Flag Set SREG(s) ← 1 SREG(s) 1

BCLR s Flag Clear SREG(s) ← 0 SREG(s) 1

BST Rr, b Bit Store from Register to T T ← Rr(b) T 1

BLD Rd, b Bit load from T to Register Rd(b) ← T None 1

SEC Set Carry C ← 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 Rd+1:Rd ← Rr+1:Rr None 1

LDI Rd, K Load Immediate Rd ← K None 1

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 ← P None 1

OUT P, Rr Out Port P ← Rr None 1

PUSH Rr Push Register on Stack STACK ← Rr None 2

POP Rd Pop Register from Stack Rd ← STACK None 2

Mnemonics Operands Description Operation Flags #Clocks

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

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

Mnemonics Operands Description Operation Flags #Clocks

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9. Ordering Information

9.1 ATmega165A

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

5. See characterization specifications at 105°C.

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

16 1.8 - 5.5V

ATmega165A-AU

ATmega165A-AUR(4)

ATmega165A-MU

ATmega165A-MUR(4)

ATmega165A-MCH

ATmega165A-MCHR(4)

64A

64M1

64MC

Industrial

(-40°C to 85°C)

ATmega165A-AN

ATmega165A-ANR(4)

ATmega165A-MN

ATmega165A-MNR(4)

64A

64M1

Extended

(-40°C to 105°C)(5)

Package Type

64A 64-Lead, Thin (1.0mm) Plastic Gull Wing Quad Flat Package (TQFP)

64M1 64-pad, 9 x 9 x 1.0mm body, lead pitch 0.50mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)

64MC 64-lead (2-row Staggered), 7 x 7 x 1.0 mm body, 4.0 x 4.0mm Exposed Pad, Quad Flat No-Lead Package (QFN)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.2 ATmega165PA

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel.

5. See characterization specifications at 105°C.

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

16 1.8 - 5.5V

ATmega165PA-AU

ATmega165PA-AUR(4)

ATmega165PA-MU

ATmega165PA-MUR(4)

ATmega165PA-MCH

ATmega165PA-MCHR(4)

64A

64M1

64MC

Industrial

(-40°C to 85°C)

ATmega165PA-AN

ATmega165PA-ANR(4)

ATmega165PA-MN

ATmega165PA-MNR(4)

64A

64M1

Extended

(-40°C to 105°C)(5)

Package Type

64A 64-Lead, Thin (1.0mm) Plastic Gull Wing Quad Flat Package (TQFP)

64M1 64-pad, 9 x 9 x 1.0mm body, lead pitch 0.50mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)

64MC 64-lead (2-row Staggered), 7 x 7 x 1.0mm body, 4.0 x 4.0 mm Exposed Pad, Quad Flat No-Lead Package (QFN)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.3 ATmega325A

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

5. See characterizations specifications at 105°C.

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V

ATmega325A-AU

ATmega325A-AUR(4)

ATmega325A-MU

ATmega325A-MUR(4)

64A

64M1

Industrial

(-40°C to 85°C)

ATmega325A-AN

ATmega325A-ANR(4)

ATmega325A-MN

ATmega325A-MNR(4)

64A

64M1

Extended

(-40°C to 105°C)(5)

Package Type

64A 64-Lead, Thin (1.0mm) Plastic Gull Wing Quad Flat Package (TQFP)

64M1 64-pad, 9 x 9 x 1.0mm body, lead pitch 0.50mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.4 ATmega325PA

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

5. See characterization specifications at 105°C.

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V

ATmega325PA-AU

ATmega325PA-AUR(4)

ATmega325PA-MU

ATmega325PA-MUR(4)

64A

64M1

Industrial

(-40°C to 85°C)

ATmega325PA-AN

ATmega325PA-ANR(4)

ATmega325PA-MN

ATmega325PA-MNR(4)

64A

64M1

Extended

(-40°C to 105°C)(5)

Package Type

64A 64-Lead, Thin (1.0mm) Plastic Gull Wing Quad Flat Package (TQFP)

64M1 64-pad, 9 x 9 x 1.0mm body, lead pitch 0.50mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.5 ATmega3250A

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

5. See characterization specifications at 105°C.

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V

ATmega3250A-AU

ATmega3250A-AUR(4)

100A

Industrial

(-40°C to 85°C)

ATmega3250A-AN

ATmega3250A-ANR(4)

100A

Extended

(-40°C to 105°C)(5)

Package Type

100A 100-lead, 14 x 14 x 1.0mm, 0.5mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.6 ATmega3250PA

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

5. See characterization specifications at 105°C.

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V

ATmega3250PA-AU

ATmega3250PA-AUR(4)

100A

Industrial

(-40°C to 85°C)

ATmega3250PA-AN

ATmega3250PA-ANR(4)

100A

Extended

(-40°C to 105°C)(5)

Package Type

100A 100-lead, 14 x 14 x 1.0mm, 0.5mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.7 ATmega645A

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V

ATmega645A-AU

ATmega645A-AUR(4)

ATmega645A-MU

ATmega645A-MUR(4)

64A

64M1

Industrial

(-40°C to 85°C)

Package Type

64A 64-Lead, Thin (1.0mm) Plastic Gull Wing Quad Flat Package (TQFP)

64M1 64-pad, 9 x 9 x 1.0mm body, lead pitch 0.50mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.8 ATmega645P

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V

ATmega645P-AU

ATmega645P-AUR(4)

ATmega645P-MU

ATmega645P-MUR(4)

64A

64M1

Industrial

(-40°C to 85°C)

Package Type

64A 64-Lead, Thin (1.0mm) Plastic Gull Wing Quad Flat Package (TQFP)

64M1 64-pad, 9 x 9 x 1.0mm body, lead pitch 0.50mm, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.9 ATmega6450A

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V ATmega6450A-AU

ATmega6450A-AUR(4)

100A

Industrial

(-40°C to 85°C)

Package Type

100A 100-lead, 14 x 14 x 1.0mm, 0.5mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

9.10 ATmega6450P

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. VCC, see Figure 28-1 on page 302.

4. Tape & Reel

Speed (MHz)(3) Power Supply Ordering Code(2) Package(1) Operation Range

20 1.8 - 5.5V ATmega6450P-AU

ATmega6450P-AUR(4)

100A

Industrial

(-40°C to 85°C)

Package Type

100A 100-lead, 14 x 14 x 1.0mm, 0.5mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

10. Packaging Information

10.1 64A

2325 Orchard Parkway

San Jose, CA 95131

TITLE DRAWING NO. REV.

64A, 64-lead, 14 x 14mm Body Size, 1.0mm Body Thickness,

0.8mm Lead Pitch, Thin Prole Plastic Quad Flat Package (TQFP) C

64A

2010-10-20

PIN 1 IDENTIFIER

0°~7°

PIN 1

A1 A2 A

E1 E

COMMON DIMENSIONS

(Unit of measure = mm)

SYMBOL MIN NOM MAX NOTE

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 0.25mm per side. Dimensions D1 and E1 are maximum

plastic body size dimensions including mold mismatch.

3. Lead coplanarity is 0.10mm maximum.

A – – 1.20

A1 0.05 – 0.15

A2 0.95 1.00 1.05

D 15.75 16.00 16.25

D1 13.90 14.00 14.10 Note 2

E 15.75 16.00 16.25

E1 13.90 14.00 14.10 Note 2

B 0.30 – 0.45

C 0.09 – 0.20

L 0.45 – 0.75

e 0.80 TYP

2325 Orchard Parkway

San Jose, CA 95131

TITLE DRAWING NO. REV.

64A, 64-lead, 14 x 14mm Body Size, 1.0mm Body Thickness,

0.8mm Lead Pitch, Thin Prole Plastic Quad Flat Package (TQFP) C

64A

2010-10-20

PIN 1 IDENTIFIER

0°~7°

PIN 1

A1 A2 A

E1 E

COMMON DIMENSIONS

(Unit of measure = mm)

SYMBOL MIN NOM MAX NOTE

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 0.25mm per side. Dimensions D1 and E1 are maximum

plastic body size dimensions including mold mismatch.

3. Lead coplanarity is 0.10mm maximum.

A – – 1.20

A1 0.05 – 0.15

A2 0.95 1.00 1.05

D 15.75 16.00 16.25

D1 13.90 14.00 14.10 Note 2

E 15.75 16.00 16.25

E1 13.90 14.00 14.10 Note 2

B 0.30 – 0.45

C 0.09 – 0.20

L 0.45 – 0.75

e 0.80 TYP

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

10.2 64M1

2325 Orchard Parkway

San Jose, CA 95131

TITLE DRAWING NO. REV.

64M1, 64-pad, 9 x 9 x 1.0 mm Body, Lead Pitch 0.50 mm,

64M1

2010-10-19

COMMON DIMENSIONS

(Unit of Measure = mm)

SYMBOL MIN NOM MAX NOTE

A 0.80 0.90 1.00

A1 – 0.02 0.05

b 0.18 0.25 0.30

D2 5.20 5.40 5.60

8.90 9.00 9.10

E2 5.20 5.40 5.60

e 0.50 BSC

L 0.35 0.40 0.45

Notes:

1. JEDEC Standard MO-220, (SAW Singulation) Fig. 1, VMMD.

2. Dimension and tolerance conform to ASMEY14.5M-1994.

TOP VIEW

SIDE VIEW

BOTTOM VIEW

Marked Pin# 1 ID

SEATING PLANE

0.08

K 1.25 1.40 1.55

Pin #1 Corner

Pin #1

Triangle

Pin #1

Chamfer

(C 0.30)

Option A

Option B

Pin #1

Notch

(0.20 R)

Option C

5.40 mm Exposed Pad, Micro Lead Frame Package (MLF)

2325 Orchard Parkway

San Jose, CA 95131

TITLE DRAWING NO. REV.

64M1, 64-pad, 9 x 9 x 1.0 mm Body, Lead Pitch 0.50 mm,

64M1

2010-10-19

COMMON DIMENSIONS

(Unit of Measure = mm)

SYMBOL MIN NOM MAX NOTE

A 0.80 0.90 1.00

A1 – 0.02 0.05

b 0.18 0.25 0.30

D2 5.20 5.40 5.60

8.90 9.00 9.10

E2 5.20 5.40 5.60

e 0.50 BSC

L 0.35 0.40 0.45

Notes:

1. JEDEC Standard MO-220, (SAW Singulation) Fig. 1, VMMD.

2. Dimension and tolerance conform to ASMEY14.5M-1994.

TOP VIEW

SIDE VIEW

BOTTOM VIEW

Marked Pin# 1 ID

SEATING PLANE

0.08

K 1.25 1.40 1.55

Pin #1 Corner

Pin #1

Triangle

Pin #1

Chamfer

(C 0.30)

Option A

Option B

Pin #1

Notch

(0.20 R)

Option C

5.40 mm Exposed Pad, Micro Lead Frame Package (MLF)

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

10.3 64MC

TITLE DRAWING NO.GPC REV.

Package Drawing Contact:

packagedrawings@atmel.com 64MCZXC A

64MC, 64QFN (2-Row Staggered),

7 x 7 x 1.00 mm Body, 4.0 x 4.0 mm Exposed Pad,

Quad Flat No Lead Package

10/3/07

COMMON DIMENSIONS

(Unit of Measure = mm)

SYMBOL MIN NOM MAX NOTE

A 0.80 0.90 1.00

A1 0.00 0.02 0.05

b 0.18 0.23 0.28

C 0.20 REF

D 6.90 7.00 7.10

D2 3.95 4.00 4.05

E 6.90 7.00 7.10

E2 3.95 4.00 4.05

eT – 0.65 –

eR – 0.65 –

K 0.20 – – (REF)

L 0.35 0.40 0.45

y 0.00 – 0.075

SIDE VIEW

TOP VIEW

BOTTOM VIEW

Note: 1. The terminal #1 ID is a Laser-marked Feature.

Pin 1 ID

EA1

eT/2

R0.20 0.40

B30

A34

B16

A18

B22

A25

K(0.1) REF

(0.18) REF

B15

A17

A26

B23

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

10.4 100A

100A, 100-lead, 14 x 14mm Body Size, 1.0mm Body Thickness,

0.5mm Lead Pitch, Thin Profile Plastic Quad Flat Package (TQFP)

100A

2014-02-05

PIN 1 IDENTIFIER

0°~7°

PIN 1

A1 A2 A

eE1 E

A – – 1.20

A1 0.05 – 0.15

A2 0.95 1.00 1.05

D 15.75 16.00 16.25

D1 13.90 14.00 14.10 Note 2

E 15.75 16.00 16.25

E1 13.90 14.00 14.10 Note 2

B 0.17 – 0.27

C 0.09 – 0.20

L 0.45 – 0.75

e 0.50 TYP

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 0.25mm per side. Dimensions D1 and E1 are maximum

plastic body size dimensions including mold mismatch.

3. Lead coplanarity is 0.08mm maximum.

COMMON DIMENSIONS

(Unit of Measure = mm)

SYMBOL MIN NOM MAX NOTE

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

11. Errata

11.1 ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P Rev. G

No known errata.

11.2 ATmega165A/165PA/325A/325PA/3250A/3250PA/645A/645P/6450A/6450P Rev. A to F

Not sampled.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

12. Datasheet Revision History

Please note that the referring page numbers in this section are referring to this document. The referring

revisions in this section are referring to the document revision.

12.1 8285F – 08/2014

12.2 8285E – 02/2013

12.3 8285D – 06/11

12.4 8285C – 06/11

1. New back page from datasheet template 2014-0502

2. Changed chip definition in the text in Section 9.6 ”Low-frequency XTAL Oscillator” on page 32.

1. Applied partially the Atmel new template. New log, front page, page layout and last page changed.

2. Added ”Electrical Characteristics – TA = -40°C to 105°C” on page 308.

3. Removed sections 28.5 and 28.6, page 326.

4. Added ”Typical Characteristics – TA = -40°C to 105°C” on page 630.

5. Changed Input hysteresis (mV) to Input hysteresis (V) throughout the “Typical characteristics – TA = -40°C to 85°C” .

6. Updated the typical characteristics to include Port H for all 100-pin devices: ATmega3250A/PA/6450/P.

Port H has the same performance as Port A, C, D, E, F, G.

7. Updated ”Packaging Information” on page 28 to take into account the added the 105°C devices.

1. Removed “Preliminary” from the front page.

1. Updated ”Signature bytes” on page 267. A, P and PA devices have different signature (0x002) bytes.

2. Updated ”DC characteristics” on page 295 for all devices.

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

12.5 8285B – 03/11

12.6 8285A – 09/10

1. Updated the datasheet according to the Atmel new Brand Style Guide

2. Updated “Signature bytes” , Table 27.3 on page 267.

3. Updated the power supply voltage (1.5 - 5.5V) for all devices in ”Ordering Information” on page 18.

4. Added “Ordering Information” for Extended Temperature (-40°C to 105°C)

1. Initial revision (Based on the ATmega165P/325P/3250P/645/6450/V).

2. Changes done compared to ATmega165P/325P/3250P/645/6450/V datasheet:

New EIMSK and EIFR register overview

New graphics in ”Typical characteristics – TA = -40°C to 85°C” on page 314.

Ordering Information includes Tape & Reel

New ”Ordering Information” on page 18.

QTouch Library Support Features

ATmega165A/PA/325A/PA/3250A/PA/645A/P/6450A/P [DATASHEET SUMMARY ]

Atmel-8285FS–AVR-ATmega–08/2014

XXX

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