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Specifications
SKU: 4237830
8-bit Microcontroller with 4/8/16/32K Bytes In-System Programmable Flash
| Parameter | Description | Value |
|---|---|---|
| Part Number | Full Part Number | ATMEGA328P-AU |
| Package | Package Type | TQFP-32 (0.8mm pitch) |
| Operating Voltage (VCC) | Supply Voltage Range | 1.8V to 5.5V |
| Operating Temperature | Temperature Range | -40°C to +85°C |
| Flash Memory | Program Memory Size | 32KB (1KB used for Bootloader) |
| EEPROM | EEPROM Size | 1KB |
| SRAM | SRAM Size | 2KB |
| Clock Speed | Maximum Clock Frequency | 20MHz (with external resonator/crystal) |
| I/O Pins | Number of I/O Pins | 23 |
| Analog-to-Digital Converter (ADC) | ADC Channels | 6 (8 with multiplexing) |
| Digital-to-Analog Converter (DAC) | DAC Channels | Not Available |
| Timers/Counters | 8-bit Timer/Counter | 2 (Timer0, Timer2) |
| Timers/Counters | 16-bit Timer/Counter | 1 (Timer1) |
| Serial Communication Interfaces | SPI, UART, I2C | Supported |
| Watchdog Timer | Watchdog Timer | Yes |
| Power Management | Power Consumption | < 1mA at 1MHz, 3V; < 0.5μA in Power-down mode |
| Reset | Reset Sources | External Pin, Power-on Reset, Brown-out Detection, Watchdog Timer |
| Brown-out Detection | Brown-out Detection | Configurable at 1.8V, 2.7V, 4.3V |
| Programming Interface | In-System Programming (ISP) | Yes |
| Programming Interface | High-Voltage Serial Programming (HVSP) | Yes |
| Programming Interface | Parallel Programming | Yes |
Instructions for Using ATMEGA328P-AU
Power Supply:
- Ensure the supply voltage (VCC) is within the range of 1.8V to 5.5V.
- Connect VCC to the appropriate power source and GND to ground.
Clock Configuration:
- For maximum performance, use an external crystal or resonator for clocking.
- The internal 8MHz oscillator can be used for lower power consumption or simpler designs.
Pin Configuration:
- Refer to the pinout diagram for correct pin assignments.
- Configure I/O pins as inputs or outputs using the DDRx registers.
- Use PORTx registers to set or read pin states.
Programming:
- Use an ISP programmer to upload code to the ATMEGA328P-AU.
- Set the fuse bits appropriately for the desired clock source and other settings.
- Use AVR Studio or a similar IDE for writing and compiling code.
Serial Communication:
- Initialize the USART for serial communication.
- Configure the baud rate, data bits, parity, and stop bits as required.
- Use the UDR register to send and receive data.
Timers and Counters:
- Initialize the timers/counters using the appropriate registers.
- Set up interrupts for timer overflow or compare match events.
- Use the timers for generating delays, PWM signals, or other timing tasks.
ADC Configuration:
- Initialize the ADC module by setting the reference voltage and prescaler.
- Select the ADC channel and start the conversion.
- Read the ADC value from the ADCL and ADCH registers.
Power Management:
- Use sleep modes to reduce power consumption.
- Enable brown-out detection to prevent operation below the minimum voltage.
Reset Handling:
- Implement a reset circuit to ensure proper initialization.
- Use the watchdog timer to recover from software faults.
Debugging:
- Use the debugWIRE interface for on-chip debugging.
- Monitor I/O pins and serial output for troubleshooting.
For detailed information, refer to the ATMEGA328P datasheet and application notes provided by Microchip Technology.
(For reference only)Inquiry - ATMEGA328P-AU
