ATMEGA406(2005) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA406
(Rev.:2005)

8-bit Microcontroller with 40K Bytes In-System Programmable Flash

Atmel Corporation 

The integrated cell balancing FETs allow cell balancing algorithms to be implemented in

software.

The MCU provides the following features: 40K bytes of In-System Programmable Flash with

Read-While-Write capabilities, 512 bytes EEPROM, 2K byte SRAM, 32 general purpose working

registers, 18 general purpose I/O lines, 11 high-voltage I/O lines, a JTAG Interface for On-chip

Debugging support and programming, two flexible Timer/Counters with PWM and compare

modes, one Wake-up Timer, an SM-Bus compliant TWI module, internal and external interrupts,

a 12-bit Sigma Delta ADC for voltage and temperature measurements, a high resolution Sigma

Delta ADC for Coulomb Counting and instantaneous current measurements, a programmable

Watchdog Timer with internal Oscillator, and four software selectable power saving modes.

The AVR core combines a rich instruction set with 32 general purpose working registers. All the

32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent

registers to be accessed in one single instruction executed in one clock cycle. The resulting

architecture is more code efficient while achieving throughputs up to ten times faster than con-

ventional CISC microcontrollers.

The Idle mode stops the CPU while allowing the other chip function to continue functioning. The

Power-down mode allows the voltage regulator, battery protection, regulator current detection,

Watchdog Timer, and Wake-up Timer to operate, while disabling all other chip functions until the

next Interrupt or Hardware Reset. In Power-save mode, the Wake-up Timer and Coulomb

Counter ADC continues to run.

The device is manufactured using Atmel’s high voltage high density non-volatile memory tech-

nology. The On-chip ISP Flash allows the program memory to be reprogrammed In-System, by

a conventional non-volatile memory programmer or by an On-chip Boot program running on the

AVR core. The Boot program can use any interface to download the application program in the

Application Flash memory. Software in the Boot Flash section will continue to run while the

Application Flash section is updated, providing true Read-While-Write operation. By combining

an 8-bit RISC CPU with In-System Self-Programmable Flash, fuel gauging ADCs, dedicated bat-

tery protection circuitry, Cell Balancing FETs, and a voltage regulator on a monolithic chip, the

Atmel ATmega406 is a powerful microcontroller that provides a highly flexible and cost effective

solution for Li-ion Smart Battery applications.

The ATmega406 AVR is supported with a full suite of program and system development tools

including: C Compilers, Macro Assemblers, Program Debugger/Simulators, and On-chip

Debugger.

4 ATmega406

2548AS–AVR–01/05

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