Datasheet
Table Of Contents
- Features
- 1. Pin Configurations
- 2. Overview
- 3. About
- 4. CPU Core
- 5. Memories
- 6. Clock System
- 7. Power Management and Sleep Modes
- 8. System Control and Reset
- 9. Interrupts
- 10. I/O Ports
- 11. 8-bit Timer/Counter0 with PWM
- 11.1 Features
- 11.2 Overview
- 11.3 Clock Sources
- 11.4 Counter Unit
- 11.5 Output Compare Unit
- 11.6 Compare Match Output Unit
- 11.7 Modes of Operation
- 11.8 Timer/Counter Timing Diagrams
- 11.9 Register Description
- 11.9.1 TCCR0A – Timer/Counter Control Register A
- 11.9.2 TCCR0B – Timer/Counter Control Register B
- 11.9.3 TCNT0 – Timer/Counter Register
- 11.9.4 OCR0A – Output Compare Register A
- 11.9.5 OCR0B – Output Compare Register B
- 11.9.6 TIMSK0 – Timer/Counter 0 Interrupt Mask Register
- 11.9.7 TIFR0 – Timer/Counter 0 Interrupt Flag Register
- 12. 16-bit Timer/Counter1
- 12.1 Features
- 12.2 Overview
- 12.3 Timer/Counter Clock Sources
- 12.4 Counter Unit
- 12.5 Input Capture Unit
- 12.6 Output Compare Units
- 12.7 Compare Match Output Unit
- 12.8 Modes of Operation
- 12.9 Timer/Counter Timing Diagrams
- 12.10 Accessing 16-bit Registers
- 12.11 Register Description
- 12.11.1 TCCR1A – Timer/Counter1 Control Register A
- 12.11.2 TCCR1B – Timer/Counter1 Control Register B
- 12.11.3 TCCR1C – Timer/Counter1 Control Register C
- 12.11.4 TCNT1H and TCNT1L – Timer/Counter1
- 12.11.5 OCR1AH and OCR1AL – Output Compare Register 1 A
- 12.11.6 OCR1BH and OCR1BL – Output Compare Register 1 B
- 12.11.7 ICR1H and ICR1L – Input Capture Register 1
- 12.11.8 TIMSK1 – Timer/Counter Interrupt Mask Register 1
- 12.11.9 TIFR1 – Timer/Counter Interrupt Flag Register 1
- 13. Timer/Counter Prescaler
- 14. USI – Universal Serial Interface
- 15. Analog Comparator
- 16. Analog to Digital Converter
- 16.1 Features
- 16.2 Overview
- 16.3 Operation
- 16.4 Starting a Conversion
- 16.5 Prescaling and Conversion Timing
- 16.6 Changing Channel or Reference Selection
- 16.7 ADC Noise Canceler
- 16.8 Analog Input Circuitry
- 16.9 Noise Canceling Techniques
- 16.10 ADC Accuracy Definitions
- 16.11 ADC Conversion Result
- 16.12 Temperature Measurement
- 16.13 Register Description
- 17. debugWIRE On-chip Debug System
- 18. Self-Programming the Flash
- 18.1 Performing Page Erase by SPM
- 18.2 Filling the Temporary Buffer (Page Loading)
- 18.3 Performing a Page Write
- 18.4 Addressing the Flash During Self-Programming
- 18.5 EEPROM Write Prevents Writing to SPMCSR
- 18.6 Reading Lock, Fuse and Signature Data from Software
- 18.7 Preventing Flash Corruption
- 18.8 Programming Time for Flash when Using SPM
- 18.9 Register Description
- 19. Memory Programming
- 19.1 Program And Data Memory Lock Bits
- 19.2 Fuse Bytes
- 19.3 Device Signature Imprint Table
- 19.4 Page Size
- 19.5 Serial Programming
- 19.6 High-voltage Serial Programming
- 19.7 High-Voltage Serial Programming Algorithm
- 19.7.1 Enter High-voltage Serial Programming Mode
- 19.7.2 Considerations for Efficient Programming
- 19.7.3 Chip Erase
- 19.7.4 Programming the Flash
- 19.7.5 Programming the EEPROM
- 19.7.6 Reading the Flash
- 19.7.7 Reading the EEPROM
- 19.7.8 Programming and Reading the Fuse and Lock Bits
- 19.7.9 Reading the Signature Bytes and Calibration Byte
- 19.7.10 Power-off sequence
- 20. Electrical Characteristics
- 21. Typical Characteristics
- 21.1 Supply Current of I/O Modules
- 21.2 Active Supply Current
- 21.3 Idle Supply Current
- 21.4 Power-down Supply Current
- 21.5 Standby Supply Current
- 21.6 Pin Pull-up
- 21.7 Pin Driver Strength
- 21.8 Pin Threshold and Hysteresis
- 21.9 BOD Threshold and Analog Comparator Offset
- 21.10 Internal Oscillator Speed
- 21.11 Current Consumption of Peripheral Units
- 21.12 Current Consumption in Reset and Reset Pulsewidth
- 22. Register Summary
- 23. Instruction Set Summary
- 24. Ordering Information
- 25. Packaging Information
- 26. Errata
- 27. Datasheet Revision History
- Table of Contents
132
8006K–AVR–10/10
ATtiny24/44/84
16. Analog to Digital Converter
16.1 Features
• 10-bit Resolution
• 1.0 LSB Integral Non-linearity
• ± 2 LSB Absolute Accuracy
• 13µs Conversion Time
• 15 kSPS at Maximum Resolution
• Eight Multiplexed Single Ended Input Channels
• Twelve Differential Input Channels with Selectable Gain (1x, 20x)
• Temperature Sensor Input Channel
• Optional Left Adjustment for ADC Result Readout
• 0 - V
CC
ADC Input Voltage Range
• 1.1V ADC Reference Voltage
• Free Running or Single Conversion Mode
• ADC Start Conversion by Auto Triggering on Interrupt Sources
• Interrupt on ADC Conversion Complete
• Sleep Mode Noise Canceler
• Unipolar / Bipolar Input Mode
• Input Polarity Reversal Mode
16.2 Overview
The ATtiny24/44/84 features a 10-bit successive approximation ADC. The ADC is connected to
8-pin port A for external sources. In addition to external sources internal temperature sensor can
be measured by ADC. Analog Multiplexer allows eight single-ended channels or 12 differential
channels from Port A. The programmable gain stage provides ampification steps 0 dB (1x) and
26 dB (20x) for 12 differential ADC channels.
The ADC contains a Sample and Hold circuit which ensures that the input voltage to the ADC is
held at a constant level during conversion. A block diagram of the ADC is shown in Figure 16-1
on page 133.
Internal reference voltage of nominally 1.1V is provided On-chip. Alternatively, V
CC
can be used
as reference voltage for single ended channels. There is also an option to use an external volt-
age reference and turn-off the internal voltage reference.