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 conventional CISC microcontrollers.
The ATtiny2313 provides the following features: 2K bytes of In-System Programmable
Flash, 128 bytes EEPROM, 128 bytes SRAM, 18 general purpose I/O lines, 32 general
purpose working registers, a single-wire Interface for On-chip Debugging, two flexible
Timer/Counters with compare modes, internal and external interrupts, a serial program-
mable USART, Universal Serial Interface with Start Condition Detector, a programmable
Watchdog Timer with internal Oscillator, and three software selectable power saving
modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, and
interrupt system to continue functioning. The Power-down mode saves the register con-
tents but freezes the Oscillator, disabling all other chip functions until the next interrupt
or hardware reset. In Standby mode, the crystal/resonator Oscillator is running while the
rest of the device is sleeping. This allows very fast start-up combined with low-power
consumption.
The device is manufactured using Atmel’s high density non-volatile memory technology.
The On-chip ISP Flash allows the program memory to be reprogrammed In-System
through an SPI serial interface, or by a conventional non-volatile memory programmer.
By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on a mono-
lithic chip, the Atmel ATtiny2313 is a powerful microcontroller that provides a highly
flexible and cost effective solution to many embedded control applications.
The ATtiny2313 AVR is supported with a full suite of program and system development
tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Cir-
cuit Emulators, and Evaluation kits.
4
ATtiny2313/V
2543F–AVR–08/04
ATMEL [ ATMEL CORPORATION ]
