ATmega3208-AU Datasheet Summary

Introduction

The ATmega3208-AU is a microcontroller from the megaAVR® 0-series, featuring an AVR® processor with a hardware multiplier capable of running up to 20 MHz. It offers 32 KB of in-system self-programmable Flash memory, 6 KB of SRAM, and 256 bytes of EEPROM.

Device Overview

• Flash Memory: 32 KB
• SRAM: 6 KB
• EEPROM: 256 bytes
• Package Type: 28-pin SSOP
• Maximum Frequency: 20 MHz
• Operating Voltage: 1.8V to 5.5V
• Temperature Range: Industrial (-40°C to +85°C)

Memory Overview

• Flash: 32 KB, organized in 128-byte pages, with write/erase endurance of 10,000 cycles.
• SRAM: 6 KB, used for storing application data.
• EEPROM: 256 bytes, with write/erase endurance of 100,000 cycles.
• User Row: 64 bytes, used for firmware settings, retained after chip erase.

Peripherals

• 16-bit Timer/Counter Type A (TCA): One instance, with three compare channels.
• 16-bit Timer/Counter Type B (TCB): Four instances, with input capture and output compare capabilities.
• 12-bit Timer/Counter Type D (TCD): Not applicable for this device.
• Real-Time Counter (RTC): One instance, can run from an external crystal or internal RC oscillator.
• USART: Four instances, with fractional baud rate generator, auto-baud, and start-of-frame detection.
• SPI: One instance, supporting master/slave communication.
• TWI (I2C): One instance, capable of operating as master and slave simultaneously.
• Analog-to-Digital Converter (ADC): One instance, 10-bit resolution, 150 ksps, with five selectable internal voltage references.
• Analog Comparator (AC): One instance, with scalable reference input.
• Configurable Custom Logic (CCL): One instance, with four programmable Look-up Tables (LUTs).
• Event System: Eight channels for core-independent and predictable inter-peripheral signaling.

I/O and Packages

• I/O Lines: Up to 41 programmable I/O lines.
• Package Options: 28-pin SSOP, 32-pin VQFN/TQFP, 48-pin UQFN/TQFP.

Power Management

• Sleep Modes: Idle, Standby, and Power-Down modes with configurable operation of selected peripherals.
• Brown-out Detector (BOD): Configurable BOD levels and operation modes for Active, Idle, and Sleep modes.

Clock Options

• Internal Oscillators: 16/20 MHz low-power oscillator, 32.768 kHz Ultra Low-Power oscillator.
• External Clock: 32.768 kHz external crystal oscillator, external clock input.

Debugging and Programming

• Unified Program and Debug Interface (UPDI): Single-pin interface for programming and debugging.
• CRC Code Memory Scan: Optional automatic CRC scan before code execution.

Applications

The ATmega3208-AU is suitable for a wide range of applications, including embedded systems, IoT devices, and automotive applications due to its robust feature set, low power consumption, and automotive-grade qualification.

Ordering Information

• Part Number: ATmega3208-AU
• Package: 28-pin SSOP
• Temperature Range: Industrial (-40°C to +85°C)