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ATtiny1614/ATtiny1616/ATtiny1617 tinyAVR 8-bit Microcontroller
ATtiny1614/ATtiny1616/ATtiny1617 tinyAVR 8-bit Microcontroller
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ATtiny1614 ATtiny1616 ATtiny1617
  1. Home
  2. 33 UPDI - Unified Program and Debug Interface
  3. 33.3 Functional Description
  4. 33.3.2 Operation

tinyAVR 8-bit Microcontroller

  • Introduction
  • Features
  • 1 tinyAVR 1-Series Overview
  • 2 Ordering Information
  • 3 Block Diagram
  • 4 Pinout
  • 5 I/O Multiplexing and Considerations
  • 6 Memories
  • 7 Peripherals and Architecture
  • 8 AVR CPU
  • 9 NVMCTRL - Non Volatile Memory Controller
  • 10 CLKCTRL - Clock Controller
  • 11 SLPCTRL - Sleep Controller
  • 12 RSTCTRL - Reset Controller
  • 13 CPUINT - CPU Interrupt Controller
  • 14 EVSYS - Event System
  • 15 PORTMUX - Port Multiplexer
  • 16 PORT - I/O Pin Configuration
  • 17 BOD - Brownout Detector
  • 18 VREF - Voltage Reference
  • 19 WDT - Watchdog Timer
  • 20 TCA - 16-bit Timer/Counter Type A
  • 21 TCB - 16-bit Timer/Counter Type B
  • 22 TCD - 12-bit Timer/Counter Type D
  • 23 RTC - Real Time Counter
  • 24 USART - Universal Synchronous and Asynchronous Receiver and Transmitter
  • 25 SPI - Serial Peripheral Interface
  • 26 TWI - Two Wire Interface
  • 27 CRCSCAN - Cyclic Redundancy Check Memory Scan
  • 28 CCL – Configurable Custom Logic
  • 29 AC – Analog Comparator
  • 30 ADC - Analog to Digital Converter
  • 31 DAC - Digital to Analog Converter
  • 32 PTC - Peripheral Touch Controller
  • 33 UPDI - Unified Program and Debug Interface
    • 33.1 Features
    • 33.2 Overview
    • 33.3 Functional Description
      • 33.3.1 Principle of Operation
      • 33.3.2 Operation
        • 33.3.2.1 UPDI Enable with Fuse Override of RESET pin
        • 33.3.2.2 UPDI Enable with 12V Override of RESET pin
        • 33.3.2.3 UPDI Disable
        • 33.3.2.4 Output Enable Timer Protection for GPIO Configuration
        • 33.3.2.5 UPDI Communication Error Handling
        • 33.3.2.6 Direction Change
      • 33.3.3 UPDI Instruction Set
      • 33.3.4 System Clock Measurement with UPDI
      • 33.3.5 Interbyte Delay
      • 33.3.6 System Information Block
      • 33.3.7 Enabling of KEY Protected Interfaces
      • 33.3.8 Events
      • 33.3.9 Sleep Mode Operation
    • 33.4 Register Summary - UPDI
    • 33.5 Register Description
  • 34 Instruction Set Summary
  • 35 Conventions
  • 36 Acronyms and Abbreviations
  • 37 Electrical Characteristics ATtiny1614/1616/1617
  • 38 Typical Characteristics
  • 39 Package Drawings
  • 40 Errata
  • 41 Datasheet Revision History
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33.3.2 Operation

The UPDI must be enabled before the UART communication can start:
  • 33.3.2.2 UPDI Enable with 12V Override of RESET pin
  • 33.3.2.1 UPDI Enable with Fuse Override of RESET pin

The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.

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