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ATtiny15L
1187H–AVR–09/07
Table of Contents Features................................................................................................. 1
Pin Configuration.................................................................................. 1
Description............................................................................................ 2
Block Diagram ...................................................................................................... 3
Pin Descriptions.................................................................................................... 4
Internal Oscillators ............................................................................................... 4
ATtiny15L Architectural Overview ...................................................... 5
The General Purpose Register File ...................................................................... 6
The ALU – Arithmetic Logic Unit........................................................................... 6
The Flash Program Memory................................................................................. 6
The Program and Data Addressing Modes .......................................................... 7
Subroutine and Interrupt Hardware Stack ............................................................ 9
The EEPROM Data Memory ................................................................................ 9
I/O Memory......................................................................................................... 10
Reset and Interrupt Handling.............................................................................. 12
Internal Voltage Reference................................................................................. 18
Interrupt Handling ............................................................................................... 19
Sleep Modes....................................................................................................... 23
Tuneable Internal RC Oscillator.......................................................................... 24
Internal PLL for Fast Peripheral Clock Generation............................................. 24
Timer/Counters ................................................................................... 25
The Timer/Counter0 Prescaler ........................................................................... 25
The Timer/Counter1 Prescaler ........................................................................... 25
The Special Function IO Register – SFIOR........................................................ 26
The 8-bit Timer/Counter0.................................................................................... 26
The 8-bit Timer/Counter1.................................................................................... 28
The Watchdog Timer .......................................................................... 34
EEPROM Read/Write Access............................................................. 36
Preventing EEPROM Corruption ........................................................................ 38
The Analog Comparator..................................................................... 39
The Analog-to-Digital Converter, Analog Multiplexer, and Gain Stag-
es.......................................................................................................... 41
Features.............................................................................................................. 41
Operation............................................................................................................ 42
Prescaling and Conversion Timing..................................................................... 43
ADC Noise Canceler Function............................................................................ 46
ADC Noise-canceling Techniques...................................................................... 50
ADC Characteristics ........................................................................................... 50
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