ATMEGA103(1999) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA103
(Rev.:1999)

8-bit Microcontroller with 64K/128K Bytes In-System Programmable Flash

Atmel Corporation 

Pin Configuration

TQFP

Description

The ATmega603/103 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing

powerful instructions in a single clock cycle, the ATmega603/103 achieves throughputs approaching 1 MIPS per MHz

allowing the system designer to optimize power consumption versus processing speed.

The AVR core is based on an enhanced RISC architecture that 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 conventional CISC microcontrollers.

The ATmega603/103 provides the following features: 64K/128K bytes of In-system Programmable Flash, 2K/4K bytes

EEPROM, 4K bytes SRAM, 32 general purpose I/O lines, 8 Input lines, 8 Output lines, 32 general purpose working regis-

ters, Real Time Counter (RTC), 4 flexible timer/counters with compare modes and PWM, UART, programmable Watchdog

Timer with internal oscillator, an SPI serial port and three software selectable power saving modes. The Idle Mode stops

the CPU while allowing the SRAM, timer/counters, SPI port and interrupt system to continue functioning. The Power Down

mode saves the register contents but freezes the oscillator, disabling all other chip functions until the next interrupt or hard-

ware reset. In Power Save mode, the timer oscillator continues to run, allowing the user to maintain a timer base while the

rest of the device is sleeping.

The device is manufactured using Atmel’s high-density nonvolatile memory technology. The on-chip ISP Flash allows the

program memory to be reprogrammed in-system through a serial interface or by a conventional nonvolatile memory pro-

grammer. By combining an 8-bit RISC CPU with a large array of ISP Flash on a monolithic chip, the Atmel ATmega603/103

is a powerful microcontroller that provides a highly flexible and cost effective solution to many embedded control

applications.

The ATmega603/103 AVR is supported with a full suite of program and system development tools including: C compilers,

macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation kits.

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ATmega603/103

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