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Overview

The ATmega406 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega406 achieves throughputs approaching 1 MIPS at 1 MHz.

Features

? High Performance, Low Power AVR? 8-bit Microcontroller

? Advanced RISC Architecture

– 124 Powerful Instructions - Most Single Clock Cycle Execution

– 32 x 8 General Purpose Working Registers

– Fully Static Operation

– Up to 1 MIPS Throughput at 1 MHz

? Nonvolatile Program and Data Memories

– 40K Bytes of In-System Self-Programmable Flash, Endurance: 10,000 Write/Erase

Cycles

– Optional Boot Code Section with Independent Lock Bits

In-System Programming by On-chip Boot Program

True Read-While-Write Operation

– 512 bytes EEPROM, Endurance: 100,000 Write/Erase Cycles

– 2K Bytes Internal SRAM

– Programming Lock for Software Security

? On-chip Debugging

– Extensive On-chip Debug Support

– Available through JTAG interface

? Battery Management Features

– Two, Three, or Four Cells in Series

– Deep Under-voltage Protection

– Over-current Protection (Charge and Discharge)

– Short-circuit Protection (Discharge)

– Integrated Cell Balancing FETs

– High Voltage Outputs to Drive Charge/Precharge/Discharge FETs

? Peripheral Features

– One 8-bit Timer/Counter with Separate Prescaler, Compare Mode, and PWM

– One 16-bit Timer/Counter with Separate Prescaler and Compare Mode

– 12-bit Voltage ADC, Eight External and Two Internal ADC Inputs

– High Resolution Coulomb Counter ADC for Current Measurements

– TWI Serial Interface for SM-Bus

– Programmable Wake-up Timer

– Programmable Watchdog Timer

? Special Microcontroller Features

– Power-on Reset

– On-chip Voltage Regulator

– External and Internal Interrupt Sources

– Four Sleep Modes: Idle, Power-save, Power-down, and Power-off

? Packages

– 48-pin LQFP

? Operating Voltage: 4.0 - 25V

? Maximum Withstand Voltage (High-voltage pins): 28V

? Temperature Range: -30°C to 85°C

– Speed Grade: 1 MHz