8-bit
Microcontroller
with 40K Bytes
In-System
Programmable
Flash
ATmega406
Preliminary
Summary
2548AS–AVR–01/05
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
Note: This is a summary document. A complete document
is available on our Web site at www.atmel.com.