Ⅰ. ATMEGA328-PU Description
Ⅱ. ATMEGA328-PU Pinout
Ⅲ. ATMEGA328-PU 3D Model
Ⅳ. ATMEGA328-PU Specifications
Ⅴ. ATMEGA328-PU Feature
Ⅵ. ATMEGA328-PU Block Diagram
Ⅶ. ATmega48A/PA/88A/PA/168A/PA/328/P Comparison Between Processors
Ⅷ. ATMEGA328-PU Package Informationh
Ⅸ. ATMEGA328-PU Datasheet
The ATMEGA328-PU from Microchip Technology is the famed through-hole MCU behind the brilliance of the Arduino UNO. This 20MHz, 1.8 - 5.5V microcontroller has enabled fast prototyping all over the world, and is now being designed in to a variety of products given its design cycle flexibility. The ATMEGA328-PU comes in a 28-lead, 0.300” wide, PDIP package and has an industrial temperature operation range from -40C to 85C. The ATmega328pu is supported with a full suite of program and system development tools. Microchip uses high density nonvolatile memory technology in manufacturing this device. Features include 32kbytes of in-system programmable Flash with readwhile-write capabilities.
1. ATMEGA328-PU Footprint
2. ATMEGA328-PU 3D Model
EU RoHS | Compliant |
ECCN (US) | EAR99 |
Part Status | NRND |
HTS | 8542.31.00.01 |
Automotive | No |
PPAP | No |
Family Name | ATmega |
Instruction Set Architecture | RISC |
Device Core | AVR |
Core Architecture | AVR |
Maximum CPU Frequency (MHz) | 20 |
Maximum Clock Rate (MHz) | 20 |
Data Bus Width (bit) | 8 |
Program Memory Type | Flash |
Program Memory Size | 32KB |
RAM Size | 2KB |
Programmability | Yes |
Process Technology | CMOS |
Interface Type | SPI/TWI/USART |
Number of I/Os | 23 |
No. of Timers | 3 |
Timers Resolution (bit) | 16 |
PWM | 6 |
Number of ADCs | Single |
ADC Channels | 8 |
ADC Resolution (bit) | 10 |
USART | 1 |
UART | 0 |
USB | 0 |
SPI | 2 |
I2C | 0 |
I2S | 0 |
CAN | 0 |
Ethernet | 0 |
Watchdog | 1 |
Analog Comparators | 1 |
Parallel Master Port | No |
Real Time Clock | No |
Minimum Operating Supply Voltage (V) | 1.8 |
Typical Operating Supply Voltage (V) | 2.5|3.3|5 |
Maximum Operating Supply Voltage (V) | 5.5 |
Minimum Operating Temperature (°C) | -40 |
Maximum Operating Temperature (°C) | 85 |
Supplier Temperature Grade | Industrial |
Packaging | Tube |
Mounting | Through Hole |
Package Height | 3.28(Max) |
Package Width | 6.76(Max) |
Package Length | 37.4(Max) |
PCB changed | 28 |
Standard Package Name | DIP |
Supplier Package | PDIP W |
Pin Count | 28 |
Lead Shape | Through Hole |
High Performance, Low Power AVR® 8-Bit Microcontroller Family
Advanced RISC Architecture
High Endurance Non-volatile Memory Segments
QTouch® library support
Peripheral Features
Temperature Measurement
Special Microcontroller Features
I/O and Packages
Operating Voltage: ̶ 1.8 - 5.5V
Temperature Range: ̶ -40°C to 85°C
Speed Grade: 0 - 4MHz@1.8 - 5.5V, 0 - 10MHz@2.7 - 5.5.V, 0 - 20MHz @ 4.5 - 5.5V
Power Consumption at 1MHz, 1.8V, 25°C
The AVR core combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers.
The ATmega48A/PA/88A/PA/168A/PA/328/P provides the following features: 4K/8Kbytes of In-System Programmable Flash with Read-While-Write capabilities, 256/512/512/1Kbytes EEPROM, 512/1K/1K/2Kbytes SRAM, 23 general purpose I/O lines, 32 general purpose working registers, three flexible Timer/Counters with compare modes, internal and external interrupts, a serial programmable USART, a byte-oriented 2-wire Serial Interface, an SPI serial port, a 6-channel 10-bit ADC (8 channels in TQFP and VQFN packages), a programmable Watchdog Timer with internal Oscillator, and five software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, USART, 2-wire Serial Interface, 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.
The ATmega48A/PA/88A/PA/168A/PA/328/P differ only in memory sizes, boot loader support, and interrupt vector sizes.
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