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ATTINY4313

8-bit Microcontroller with 2/4K Bytes In-System Programmable Flash

Atmel Corporation 

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 ATtiny2313A/4313 provides the following features: 2/4K bytes of In-System Programmable

Flash, 128/256 bytes EEPROM, 128/256 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 programmable

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 func-

tioning. The Power-down mode saves the register contents but freezes the Oscillator, disabling

all other chip functions until the next interrupt or hardware reset. In Standby mode, the crys-

tal/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 monolithic chip, the Atmel

ATtiny2313A/4313 is a powerful microcontroller that provides a highly flexible and cost effective

solution to many embedded control applications.

The ATtiny2313A/4313 AVR is supported with a full suite of program and system development

tools including: C Compilers, Macro Assemblers, Program Debugger/Simulators, In-Circuit Emu-

lators, and Evaluation kits.

2.2 Comparison Between ATtiny2313A and ATtiny4313

The ATtiny2313A and ATtiny4313 differ only in memory sizes. Table 2-1 summarizes the differ-

ent memory sizes for the two devices.

Table 2-1. Memory Size Summary

Device

Flash

ATtiny2313A

2K Bytes

ATtiny4313

4K Bytes

EEPROM

128 Bytes

256 Bytes

RAM

128 Bytes

256 Bytes

6 ATtiny2313A/4313

8246BS–AVR–09/11

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