ATtiny15L
2
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 ATtiny15L provides 1K bytes of Flash, 64 bytes EEPROM, 6 general-purpose I/O lines, 32 general-purpose working
registers, two 8-bit timer/counters, one with high speed PWM output, internal oscillators, internal and external interrupts,
programmable Watchdog Timer, 4-channel 10-bit Analog to Digital Converter with one differential voltage input with
optional 20x gain, and three software-selectable power-saving modes. The Idle mode stops the CPU while allowing the
ADC, analog comparator, timer/counters and interrupt system to continue functioning. The ADC Noise Reduction mode
facilitates high-accuracy ADC measurements by stopping the CPU while allowing the ADC to continue functioning. The
Power-down mode saves the register contents but freezes the oscillators, disabling all other chip functions until the next
interrupt or hardware reset. The wake-up or interrupt on pin change features enable the ATtiny15L to be highly responsive
to external events, still featuring the lowest power consumption while in the power-saving modes.
The device is manufactured using Atmel’s high density nonvolatile memory technology. By combining an enhanced RISC
8-bit CPU with Flash on a monolithic chip, the Atmel ATtiny15L is a powerful microcontroller that provides a highly-flexible
and cost-efficient solution to many embedded control applications. The peripheral features make the ATtiny15L particularly
suited for battery chargers, lighting ballasts, and all kinds of intelligent sensor applications.
The ATtiny15L AVR is supported with a full suite of program and system development tools including macro assemblers,
program debugger/simulators, in-circuit emulators, and evaluation kits.
