AVR Microcontrollers. ATmega328 Datasheet

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ATmega328 Datasheet
Recommendation ATmega328 Datasheet
Part ATmega328
Description 8-bit AVR Microcontrollers
Feature ATmega328; 8-bit AVR Microcontrollers ATmega328/P DATASHEET COMPLETE Introduction The Atmel® picoPower® ATmega3.
Manufacture ATMEL
Datasheet
Download ATmega328 Datasheet





ATMEL ATmega328
8-bit AVR Microcontrollers
ATmega328/P
DATASHEET COMPLETE
Introduction
The Atmel® picoPower® ATmega328/P 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 ATmega328/P
achieves throughputs close to 1MIPS per MHz. This empowers system
designer to optimize the device for power consumption versus processing
speed.
Feature
High Performance, Low Power Atmel®AVR® 8-Bit Microcontroller Family
Advanced RISC Architecture
131 Powerful Instructions
Most Single Clock Cycle Execution
32 x 8 General Purpose Working Registers
Fully Static Operation
Up to 20 MIPS Throughput at 20MHz
On-chip 2-cycle Multiplier
High Endurance Non-volatile Memory Segments
32KBytes of In-System Self-Programmable Flash program
Memory
1KBytes EEPROM
2KBytes Internal SRAM
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
QTouch and QMatrix® Acquisition
Up to 64 sense channels
Atmel-42735A-ATmega328/P_Datasheet_Complete-06/2016



ATMEL ATmega328
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
Six PWM Channels
8-channel 10-bit ADC in TQFP and QFN/MLF package
• Temperature Measurement
6-channel 10-bit ADC in PDIP Package
• Temperature Measurement
Two Master/Slave SPI Serial Interface
One Programmable Serial USART
One Byte-oriented 2-wire Serial Interface (Philips I2C compatible)
Programmable Watchdog Timer with Separate On-chip Oscillator
One On-chip Analog Comparator
Interrupt and Wake-up on Pin Change
Special Microcontroller Features
Power-on Reset and Programmable Brown-out Detection
Internal Calibrated Oscillator
External and Internal Interrupt Sources
Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and
Extended Standby
I/O and Packages
23 Programmable I/O Lines
28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF
Operating Voltage:
1.8 - 5.5V
Temperature Range:
-40°C to 105°C
Speed Grade:
0 - 4MHz @ 1.8 - 5.5V
0 - 10MHz @ 2.7 - 5.5V
0 - 20MHz @ 4.5 - 5.5V
Power Consumption at 1MHz, 1.8V, 25°C
Active Mode: 0.2mA
Power-down Mode: 0.1μA
Power-save Mode: 0.75μA (Including 32kHz RTC)
Atmel ATmega328/P [DATASHEET]
Atmel-42735A-ATmega328/P_Datasheet_Complete-06/2016
2



ATMEL ATmega328
Table of Contents
Introduction......................................................................................................................1
Feature............................................................................................................................ 1
1. Description.................................................................................................................9
2. Configuration Summary........................................................................................... 10
3. Ordering Information ............................................................................................... 11
3.1. ATmega328 ............................................................................................................................... 11
3.2. ATmega328P .............................................................................................................................12
4. Block Diagram......................................................................................................... 13
5. Pin Configurations................................................................................................... 14
5.1. Pin-out........................................................................................................................................ 14
5.2. Pin Descriptions..........................................................................................................................17
6. I/O Multiplexing........................................................................................................ 19
7. Resources................................................................................................................21
8. Data Retention.........................................................................................................22
9. About Code Examples............................................................................................. 23
10. Capacitive Touch Sensing....................................................................................... 24
10.1. QTouch Library........................................................................................................................... 24
11. AVR CPU Core........................................................................................................ 25
11.1.
11.2.
11.3.
11.4.
11.5.
11.6.
11.7.
Overview.....................................................................................................................................25
ALU – Arithmetic Logic Unit........................................................................................................26
Status Register...........................................................................................................................26
General Purpose Register File................................................................................................... 28
Stack Pointer.............................................................................................................................. 29
Instruction Execution Timing...................................................................................................... 31
Reset and Interrupt Handling..................................................................................................... 32
12. AVR Memories.........................................................................................................34
12.1. Overview.....................................................................................................................................34
12.2. In-System Reprogrammable Flash Program Memory................................................................ 34
12.3. SRAM Data Memory...................................................................................................................35
12.4. EEPROM Data Memory............................................................................................................. 36
12.5. I/O Memory.................................................................................................................................37
12.6. Register Description................................................................................................................... 38
13. System Clock and Clock Options............................................................................ 48





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