Atmel ATtiny26

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ATtiny26(L)

1477G–AVR–03/05

Table of Contents

Table of Contents Features1
Pin Configuration2
Description3
- Block Diagram4
- Pin Descriptions5
About Code Examples5
AVR CPU Core6
- Architectural Overview6
- General Purpose Register File7
- ALU - Arithmetic Logic Unit8
- Status Register - SREG9
- Stack Pointer - SP10
- Program and Data Addressing Modes10
Memories15
- In-System Programmable Flash Program Memory16
- SRAM Data Memory16
- EEPROM Data Memory17
- I/O Memory20
System Clock and Clock Options22
- Clock Systems and Their Distribution22
- Clock Sources24
- Default Clock Source25
- Crystal Oscillator25
- Low-Frequency Crystal Oscillator26
- External RC Oscillator27
- Calibrated Internal RC Oscillator28
- External Clock29
- High Frequency PLL Clock - PLLCLK30
System Control and Reset31
- Power-On Reset32
- External Reset33
- Brown-Out Detection34
- Watchdog Reset34
- MCU Status Register - MCUSR35
Power Management and Sleep Modes36
- MCU Control Register - MCUCR36
- Idle Mode37
- ADC Noise Reduction Mode37
- Power-Down Mode37
- Standby Mode38
- Minimizing Power Consumption39
I/O Ports41
- Introduction41
- Ports as General Digital I/O42
- Alternate Port Functions46
- Register Description for I/O Ports56
Interrupts57
- Interrupt Vectors57
- Interrupt Handling58
External Interrupt62
- Pin Change Interrupt62
Timer/Counters64
- Timer/Counter0 Prescaler64
- Timer/Counter1 Prescaler65
- 8-Bit Timer/Counter065
- 8-Bit Timer/Counter167
Watchdog Timer78
Universal Serial Interface - USI80
- Overview80
- Register Descriptions81
- Functional Descriptions85
- Alternative USI Usage90
Analog Comparator91
Analog to Digital Converter94
- Features94
- Operation95
- Prescaling and Conversion Timing96
- Changing Channel or Reference Selection98
- ADC Noise Canceler Function99
- ADC Conversion Result99
- Scanning Multiple Channels105
- ADC Noise Canceling Techniques105
- Offset Compensation Schemes105
Memory Programming107
- Program and Data Memory Lock Bits107
- Fuse Bits108
- Signature Bytes109
- Calibration Byte109
- Page Size109
- Parallel Programming Parameters, Pin Mapping, and Commands109
- Parallel Programming112
- Serial Downloading121
- Serial Programming Pin Mapping121
Electrical Characteristics126
- Absolute Maximum Ratings126
- DC Characteristics126
- External Clock Drive Waveforms128
- External Clock Drive128
- ADC Characteristics129
Attiny26 Typical Characteristics131
Register Summary168
Instruction Set Summary169
Ordering Information171
Packaging Information172
- 20P3172
- 173173
- 32M1-A174
Errata175
- Attiny26, All Revisions175
Datasheet Revision History176
- Changes from Rev. 1477F-12/04 to Rev. 1477G-03/05176
- Changes from Rev. 1477E-10/03 to Rev. 1477F-12/04176
- Changes from Rev. 1477D-05/03 to Rev. 1477E-10/03176
- Changes from Rev. 1477C-09/02 to Rev. 1477D-05/03176
- Changes from Rev. 1477B-04/02 to Rev. 1477C-09/02177
- Changes from Rev. 1477A-03/02 to Rev. 1477B-04/02177

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