Atmel ATtiny25 Manuals

Manuals and User Guides for Atmel ATtiny25. We have 1 Atmel ATtiny25 manual available for free PDF download: Manual

Atmel ATtiny25 Manual (196 pages)

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

Brand: Atmel | Category: Microcontrollers | Size: 3.41 MB

Features

1
1 Pin Configurations

2
2 Overview

2
- Block Diagram
  3
- Automotive Quality Grade
  4
- Pin Descriptions
  5
3 About Code Examples

5
4 AVR CPU Core

5
- Introduction
  5
- Architectural Overview
  6
- ALU - Arithmetic Logic Unit
  7
- Status Register
  7
- General Purpose Register File
  9
- Stack Pointer
  10
- Instruction Execution Timing
  11
- Reset and Interrupt Handling
  11
5 AVR Attiny25/45/85 Memories

13
- In-System Re-Programmable Flash Program Memory
  13
- SRAM Data Memory
  14
- EEPROM Data Memory
  15
- I/O Memory
  21
6 System Clock and Clock Options

21
- Clock Systems and Their Distribution
  21
- Clock Sources
  23
- Default Clock Source
  24
- Crystal Oscillator
  24
- Low-Frequency Crystal Oscillator
  25
- Calibrated Internal RC Oscillator
  26
- External Clock
  27
- 128 Khz Internal Oscillator
  28
- Clock Output Buffer
  29
- System Clock Prescaler
  29
7 Power Management and Sleep Modes

31
- MCU Control Register - MCUCR
  31
- Idle Mode
  32
- ADC Noise Reduction Mode
  32
- Power-Down Mode
  32
- Limitations
  33
- Power Reduction Register
  33
- Minimizing Power Consumption
  34
8 System Control and Reset

35
- Resetting the AVR
  35
- Reset Sources
  35
- Power-On Reset
  36
- External Reset
  37
- Brown-Out Detection
  38
- Watchdog Reset
  39
- MCU Status Register - MCUSR
  40
- Internal Voltage Reference
  40
- Watchdog Timer
  41
- Timed Sequences for Changing the Configuration of the Watchdog Timer
  44
9 Interrupts

45
- Interrupt Vectors in Attiny25/45/85
  45
10 O Ports

46
- Introduction
  46
- Ports as General Digital I/O
  47
- Alternate Port Functions
  52
- Register Description for I/O-Ports
  58
11 External Interrupts

58
12 8-Bit Timer/Counter0 with PWM

61
- Overview
  61
- Timer/Counter Clock Sources
  62
- Counter Unit
  62
- Output Compare Unit
  63
- Compare Match Output Unit
  65
- Modes of Operation
  66
- Timer/Counter Timing Diagrams
  70
- 8-Bit Timer/Counter Register Description
  72
13 Timer/Counter Prescaler

78
- Prescaler Reset
  78
- External Clock Source
  79
14 Counter and Compare Units

81
- Timer/Counter1
  81
15 Dead Time Generator

93
16 Universal Serial Interface - USI

96
- Overview
  96
- Functional Descriptions
  97
- Alternative USI Usage
  103
- USI Register Descriptions
  103
17 Analog Comparator

108
18 Analog to Digital Converter

111
- Features
  111
- Operation
  112
- Starting a Conversion
  113
- Prescaling and Conversion Timing
  114
- Changing Channel or Reference Selection
  117
- ADC Noise Canceler
  118
- ADC Conversion Result
  121
19 Debugwire On-Chip Debug System

128
- Features
  128
- Overview
  128
- Physical Interface
  128
- Software Break Points
  129
- Limitations of Debugwire
  129
- Debugwire Related Register in I/O Memory
  129
20 Self-Programming the Flash

130
- Performing Page Erase by SPM
  130
- Filling the Temporary Buffer
  130
- Performing a
  131
- Addressing the Flash During Self-Programming
  131
21 Memory Programming

134
- Program and Data Memory Lock Bits
  134
- Fuse Bytes
  135
- Signature Bytes
  137
- Calibration Byte
  137
- Page Size
  137
- Serial Downloading
  138
- High-Voltage Serial Programming
  142
- High-Voltage Serial Programming Algorithm Sequence
  144
- High-Voltage Serial Programming Characteristics
  149
22 Electrical Characteristics

150
- Absolute Maximum Ratings
  150
- External Clock Drive Waveforms
  151
- External Clock Drive
  152
- ADC Characteristics - Preliminary Data
  153
- Calibrated RC Oscillator Accuracy
  154
23 Typical Characteristics

154
- Active Supply Current
  155
- Idle Supply Current
  157
- Power-Down Supply Current
  161
- Pin Pull-Up
  162
- Pin Driver Strength
  165
- Pin Thresholds and Hysteresis
  168
- BOD Thresholds and Analog Comparator Offset
  171
- Internal Oscillator Speed
  172
- Current Consumption of Peripheral Units
  175
- Current Consumption in Reset and Reset Pulse Width
  176
- Analog to Digital Converter
  177
24 Register Summary

182
25 Instruction Set Summary

184
26 Ordering Information

186
27 Packaging Information

187
28 Document Revision History

189
- Revision 7598H - 07/09
  189
- Revision 7598G - 03/08
  189
- Revision 7598F - 11/07
  189
- Revision 7598E - 03/07
  189
- Revision 7598D - 02/07
  189
- Revision 7598C - 09/06
  189
- Revision 7598B - 08/06
  189
- Changes from Revision 2535A-09/01 to Revision 7598A-04/06
  189
29 Errata

190
- Attiny25, Revision E
  190
- Attiny45, Revision G
  190
- Attiny85, Revision C
  190

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Table of Contents

Features

1 Pin Configurations

2 Overview

3 About Code Examples

4 AVR CPU Core

5 AVR Attiny25/45/85 Memories

6 System Clock and Clock Options

7 Power Management and Sleep Modes

8 System Control and Reset

9 Interrupts

10 O Ports

11 External Interrupts

12 8-Bit Timer/Counter0 with PWM

13 Timer/Counter Prescaler

14 Counter and Compare Units

15 Dead Time Generator

16 Universal Serial Interface - USI

17 Analog Comparator

18 Analog to Digital Converter

19 Debugwire On-Chip Debug System

20 Self-Programming the Flash

21 Memory Programming

22 Electrical Characteristics

23 Typical Characteristics

24 Register Summary

25 Instruction Set Summary

26 Ordering Information

27 Packaging Information

28 Document Revision History

29 Errata

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