Datasheet
Table Of Contents
- Features
- 1. Ordering Information
- 2. Pinout/Block Diagram
- 3. Overview
- 4. Resources
- 5. Capacitive touch sensing
- 6. AVR CPU
- 7. Memories
- 8. Event System
- 9. System Clock and Clock options
- 9.1 Features
- 9.2 Overview
- 9.3 Clock Sources
- 9.3.1 32kHz Ultra Low Power Internal Oscillator
- 9.3.2 32.768kHz Calibrated Internal Oscillator
- 9.3.3 32.768kHz Crystal Oscillator
- 9.3.4 0.4 - 16MHz Crystal Oscillator
- 9.3.5 2MHz Run-time Calibrated Internal Oscillator
- 9.3.6 32MHz Run-time Calibrated Internal Oscillator
- 9.3.7 External Clock Sources
- 9.3.8 PLL with 1x-31x Multiplication Factor
- 10. Power Management and Sleep Modes
- 11. System Control and Reset
- 12. WDT – Watchdog Timer
- 13. Interrupts and Programmable Multilevel Interrupt Controller
- 14. I/O Ports
- 15. TC0/1 – 16-bit Timer/Counter Type 0 and 1
- 16. TC2 – Timer/Counter Type 2
- 17. AWeX – Advanced Waveform Extension
- 18. Hi-Res – High Resolution Extension
- 19. RTC – 16-bit Real-Time Counter
- 20. USB – Universal Serial Bus Interface
- 21. TWI – Two-Wire Interface
- 22. SPI – Serial Peripheral Interface
- 23. USART
- 24. IRCOM – IR Communication Module
- 25. CRC – Cyclic Redundancy Check Generator
- 26. ADC – 12-bit Analog to Digital Converter
- 27. AC – Analog Comparator
- 28. Programming and Debugging
- 29. Pinout and Pin Functions
- 30. Peripheral Module Address Map
- 31. Instruction Set Summary
- 32. Packaging information
- 33. Electrical Characteristics TBD
- 34. Typical Characteristics TBD
- 35. Errata
- 36. Datasheet Revision History
- Table of Contents
51
8493A–AVR–02/12
XMEGA C4
28. Programming and Debugging
28.1 Features
• Programming
– External programming through PDI interface
Minimal protocol overhead for fast operation
Built-in error detection and handling for reliable operation
– Boot loader support for programming through any communication interface
• Debugging
– Nonintrusive, real-time, on-chip debug system
– No software or hardware resources required from device except pin connection
– Program flow control
Go, Stop, Reset, Step Into, Step Over, Step Out, Run-to-Cursor
– Unlimited number of user program breakpoints
– Unlimited number of user data breakpoints, break on:
Data location read, write, or both read and write
Data location content equal or not equal to a value
Data location content is greater or smaller than a value
Data location content is within or outside a range
– No limitation on device clock frequency
• Program and Debug Interface (PDI)
– Two-pin interface for external programming and debugging
– Uses the Reset pin and a dedicated pin
– No I/O pins required during programming or debugging
28.2 Overview
The Program and Debug Interface (PDI) is an Atmel proprietary interface for external program-
ming and on-chip debugging of a device.
The PDI supports fast programming of nonvolatile memory (NVM) spaces; flash, EEPOM, fuses,
lock bits, and the user signature row.
Debug is supported through an on-chip debug system that offers nonintrusive, real-time debug.
It does not require any software or hardware resources except for the device pin connection.
Using the Atmel tool chain, it offers complete program flow control and support for an unlimited
number of program and complex data breakpoints. Application debug can be done from a C or
other high-level language source code level, as well as from an assembler and disassembler
level.
Programming and debugging can be done through the PDI physical layer. This is a two-pin inter-
face that uses the Reset pin for the clock input (PDI_CLK) and one other dedicated pin for data
input and output (PDI_DATA). Any external programmer or on-chip debugger/emulator can be
directly connected to this interface.