Description
Description
The ATmega328P is a highly integrated 8-bit AVR microcontroller designed for embedded systems requiring strict resource efficiency and low power consumption. It delivers up to 16 MIPS performance at 16MHz and includes 32KB of Flash memory, 1KB EEPROM, and 2KB SRAM, making it ideal for handling mid-scale control logic and data buffering.
Rich peripheral support includes three timers, six PWM channels, an 8-channel 10-bit ADC, and SPI/I2C/USART serial interfaces for seamless integration with sensors, actuators, and communication protocols. With multiple low-power sleep modes and a watchdog timer, it ensures reliable performance in battery-powered applications. In-system self-programming (ISP) and a dedicated bootloader section enable easy firmware updates and mass production. Its wide operating temperature range from –40°C to +125°C makes it well-suited for automotive, industrial control, and other high-reliability applications.
Feature：
- High performance, low power AVR® 8-bit microcontroller
- Advanced RISC architecture
131 powerful instructions – most single clock cycle execution
32 x 8 general purpose working registers
Fully static operation
Up to 16MIPS throughput at 16MHz
On-chip 2-cycle multiplier - High endurance non-volatile memory segments
32K bytes of in-system self-programmable flash program memory
1Kbytes EEPROM
2Kbytes internal SRAM
Write/erase cycles: 10,000 flash/100,000 EEPROM
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 - 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
Programmable serial USART
Master/slave SPI serial interface
Byte-oriented 2-wire serial interface (Phillips I2C compatible)
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
Six sleep modes: Idle, ADC noise reduction, power-save, power-down, standby, and extended standby - I/O and packages
23 programmable I/O lines
32-lead TQFP, and 32-pad QFN/MLF - Operating voltage: 2.7V to 5.5V for ATmega328P
- Temperature range: Automotive temperature range: –40°C to +125°C
- Speed grade:
0 to 8MHz at 2.7 to 5.5V (automotive temperature range: -40°C to +125°C)
0 to 16MHz at 4.5 to 5.5V (automotive temperature range: -40°C to +125°C) - Low power consumption
Active mode: 1.5mA at 3V - 4MHz
Power-down mode: 1µA at 3V
Specification
| Core: | AVR |
| Program Memory Size: | 32 kB |
| Data RAM Size: | 2 kB |
| Package / Case: | TQFP-32 |
| Maximum Clock Frequency: | 20 MHz |
| ADC Resolution: | 10 bit |
| Number of I/Os: | 23 I/O |
| Supply Voltage: | 1.8 V - 5.5 V |
| Data Bus Width: | 8 bit |
| Operating Temperature: | - 40°C ~ + 85°C |
| Data RAM Type: | SRAM |
| Data ROM Size: | 1 kB |
| Data ROM Type: | EEPROM |
| Length x Width x Height: | 7 x 7 x 1 mm |
| Interface Type: | I2C, SPI, USART |
| Moisture Sensitive: | Yes |
| Number of ADC Channels: | 8 Channel |
| Number of Timers/Counters: | 3 Timer |
Documents
Datasheet
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