Features: • High-performance, Low-power AVR ® 8-bit Microcontroller
• RISC Architecture
118 Powerful Instructions Most Single Clock Cycle Execution
32 x 8 General Purpose Working Registers
Fully Static Operation
Up to 16 MIPS Throughput at 16 MHz
• Data and Non-volatile Program Memory
2K Bytes of In-System Programmable Program Memory Flash Endurance: 10,000 Write/Erase Cycles
128 Bytes of In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles
128 Bytes Internal SRAM
Programming Lock for Flash Program and EEPROM Data Security
• Peripheral Features
8-bit Timer/Counter with Separate Prescaler
8-bit High-speed Timer with Separate Prescaler 2 High Frequency PWM Outputs with Separate Output Compare Registers Non-overlapping Inverted PWM Output Pins
Universal Serial Interface with Start Condition Detector
10-bit ADC 11 Single Ended Channels 8 Differential ADC Channels
7 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
On-chip Analog Comparator
External Interrupt
Pin Change Interrupt on 11 Pins
Programmable Watchdog Timer with Separate On-chip Oscillator
• Special Microcontroller Features
Low Power Idle, Noise Reduction, and Power-down Modes
Power-on Reset and Programmable Brown-out Detection
External and Internal Interrupt Sources
In-System Programmable via SPI Port
Internal Calibrated RC Oscillator
• I/O and Packages
20-lead PDIP/SOIC: 16 Programmable I/O Lines
32-lead MLF: 16 programmable I/O Lines
• Operating Voltages
2.7V - 5.5V for ATtiny26L
4.5V - 5.5V for ATtiny26
• Speed Grades
0 - 8 MHz for ATtiny26L
0 - 16 MHz for ATtiny26
• Power Consumption at 1 MHz, 3V and 25°C for ATtiny26L
Active 16 MHz, 5V and 25°C: Typ 15 mA
Active 1 MHz, 3V and 25°C: 0.70 mA
Idle Mode 1 MHz, 3V and 25°C: 0.18 mA
Power-down Mode: < 1 µAPinout
DescriptionThe ATtiny26(L) is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle,the ATtiny 26(L) achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
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 ATtiny26(L) has a high precision ADC with up to 11 single ended channels and 8 differential channels. Seven differential channels have an optional gain of 20x. Four out of the seven differential channels, which have the optional gain, can be used at the same time. The ATtiny26(L) also has a high frequency 8-bit PWM module with two independent outputs. Two of the PWM outputs have inverted non-overlapping output pins ideal for synchronous rectifica-tion. The Universal Serial Interface of the ATtiny26(L) allows efficient software implementation of TWI (Two-wire Serial Interface) or SM-bus interface. These features allow for highly integrated battery charger and lighting ballast applications, low-end ther-mostats, and firedetectors, among other applications.
The ATtiny26(L) provides 2K bytes of Flash, 128 bytes EEPROM, 128 bytes SRAM, up to 16 general purpose I/O lines, 32 general purpose working registers, two 8-bit Timer/Counters, one with PWM outputs, internal and external Oscillators, internal and external interrupts, programmable Watchdog Timer, 11-channel, 10-bit Analog to Digital Converter with two differential voltage input gain stages, and four software selectable power saving modes. The Idle mode stops the CPU while allowing the Timer/Counters and interrupt system to continue functioning. The ATtiny26(L) also has a dedicated ADC Noise Reduction mode for reducing the noise in ADC conversion. In this sleep mode, only the ADC is functioning. The Power-down mode saves the register contents but freezes the oscillators, disabling all other chip functions until the next interrupt or hard- ware reset. The Standby mode is the same as the Power-down mode, but external oscillators are enabled. The wakeup or interrupt on pin change features enable the ATtiny26(L) to be highly responsive to external events, still featuring the lowest power consumption while in the Power-down mode.
The device is manufactured using Atmel's high density non-volatile memory technology. By combining an enhanced RISC 8-bit CPU with Flash on a monolithic chip, the ATtiny26(L) is a powerful microcontroller that provides a highly flexible and cost effec-tive solution to many embedded control applications.
The ATtiny26(L) 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.
ATtiny26 Data Sheet
