Overview
The ATMEGA328-PU is a single-chip microcontroller from Microchip Technology, part of the megaAVR family. Originally developed by Atmel, this microcontroller was later acquired by Microchip Technology in 2016. It features a modified Harvard architecture 8-bit RISC processor core, known for its efficiency and low power consumption. The ATMEGA328-PU is widely used in various applications due to its robust feature set, ease of programming, and compatibility with popular development platforms like Arduino.
Key Specifications
| Parameter | Value |
|---|---|
| CPU Type | 8-bit AVR |
| Maximum CPU Speed | 20 MHz |
| Performance | 20 MIPS at 20 MHz |
| Flash Memory | 32 KB |
| SRAM | 2 KB |
| EEPROM | 1 KB |
| Package Pin Count | 28 |
| Maximum I/O Pins | 23 |
| External Interrupts | 24 |
| Operating Voltage | 1.8 - 5.5 V |
| Operating Temperature | -40°C to 85°C |
| Timer/Counters | 2 x 8-bit, 1 x 16-bit |
| PWM Channels | 6 |
| A/D Converter Channels | 6 x 10-bit |
| Capacitive Touch Sensing Channels | 16 |
Key Features
- 131 powerful instructions, most executed in a single clock cycle
- 32 general-purpose working registers
- Fully static operation
- Up to 20 MIPS throughput at 20 MHz
- On-chip 2-cycle multiplier
- Write/erase cycles: 10,000 flash/100,000 EEPROM
- Optional boot code section with independent lock bits
- In-system programming by an on-chip boot program
- True read-while-write operation
- Programming lock for software security
- Atmel QTouch library support for capacitive touch buttons, sliders, and wheels
- Programmable serial USART, SPI, and 2-wire serial interface
Applications
The ATMEGA328-PU is commonly used in a variety of projects and autonomous systems where a simple, low-powered, and low-cost microcontroller is required. It is particularly popular in the Arduino development platform, including models such as the Arduino Uno, Arduino Pro Mini, and Arduino Nano. Other applications include robotics, IoT devices, and various embedded systems where its robust feature set and ease of use are beneficial.
Q & A
- What is the maximum clock frequency of the ATMEGA328-PU?
The maximum clock frequency is 20 MHz. - How much flash memory does the ATMEGA328-PU have?
The ATMEGA328-PU has 32 KB of ISP flash memory. - What is the operating voltage range of the ATMEGA328-PU?
The operating voltage range is between 1.8 and 5.5 volts. - How many I/O pins does the ATMEGA328-PU have?
The ATMEGA328-PU has 23 general-purpose I/O lines. - Does the ATMEGA328-PU support capacitive touch sensing?
Yes, it supports up to 16 capacitive touch sensing channels. - What are the primary timer/counters available on the ATMEGA328-PU?
The device has 2 x 8-bit and 1 x 16-bit timer/counters. - Can the ATMEGA328-PU be programmed in-system?
Yes, it supports in-system programming by an on-chip boot program. - What is the maximum temperature range for the ATMEGA328-PU?
The operating temperature range is -40°C to 85°C. - How many PWM channels are available on the ATMEGA328-PU?
The device has 6 PWM channels. - Is the ATMEGA328-PU still recommended for new designs?
No, it is not recommended for new designs (NRND).
