Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller TQFP 44 (10x10) 8/16-Bit 32 MHz I/O number 34

Table Of Contents

Features
1. Ordering Information
2. Pinout/Block Diagram
3. Overview
- 3.1 Block Diagram
4. Resources
- 4.1 Recommended reading
5. Capacitive touch sensing
6. AVR CPU
- 6.1 Features
- 6.2 Overview
- 6.3 Architectural Overview
- 6.4 ALU - Arithmetic Logic Unit
  - 6.4.1 Hardware Multiplier
- 6.5 Program Flow
- 6.6 Status Register
- 6.7 Stack and Stack Pointer
- 6.8 Register File
7. Memories
- 7.1 Features
- 7.2 Overview
- 7.3 Flash Program Memory
- 7.4 Fuses and Lock bits
- 7.5 Data Memory
- 7.6 EEPROM
- 7.7 I/O Memory
  - 7.7.1 General Purpose I/O Registers
- 7.8 Memory Timing
- 7.9 Device ID and Revision
- 7.10 I/O Memory Protection
- 7.11 Flash and EEPROM Page Size
8. Event System
- 8.1 Features
- 8.2 Overview
9. System Clock and Clock options
- 9.1 Features
- 9.2 Overview
- 9.3 Clock Sources
10. Power Management and Sleep Modes
- 10.1 Features
- 10.2 Overview
- 10.3 Sleep Modes
11. System Control and Reset
- 11.1 Features
- 11.2 Overview
- 11.3 Reset Sequence
- 11.4 Reset Sources
12. WDT – Watchdog Timer
- 12.1 Features
- 12.2 Overview
13. Interrupts and Programmable Multilevel Interrupt Controller
- 13.1 Features
- 13.2 Overview
- 13.3 Interrupt vectors
14. I/O Ports
- 14.1 Features
- 14.2 Overview
- 14.3 Output Driver
- 14.4 Input sensing
- 14.5 Alternate Port Functions
15. TC0/1 – 16-bit Timer/Counter Type 0 and 1
- 15.1 Features
- 15.2 Overview
16. TC2 – Timer/Counter Type 2
- 16.1 Features
- 16.2 Overview
17. AWeX – Advanced Waveform Extension
- 17.1 Features
- 17.2 Overview
18. Hi-Res – High Resolution Extension
- 18.1 Features
- 18.2 Overview
19. RTC – 16-bit Real-Time Counter
- 19.1 Features
- 19.2 Overview
20. USB – Universal Serial Bus Interface
- 20.1 Features
- 20.2 Overview
21. TWI – Two-Wire Interface
- 21.1 Features
- 21.2 Overview
22. SPI – Serial Peripheral Interface
- 22.1 Features
- 22.2 Overview
23. USART
- 23.1 Features
- 23.2 Overview
24. IRCOM – IR Communication Module
- 24.1 Features
- 24.2 Overview
25. CRC – Cyclic Redundancy Check Generator
- 25.1 Features
- 25.2 Overview
26. ADC – 12-bit Analog to Digital Converter
- 26.1 Features
- 26.2 Overview
27. AC – Analog Comparator
- 27.1 Features
- 27.2 Overview
28. Programming and Debugging
- 28.1 Features
- 28.2 Overview
29. Pinout and Pin Functions
- 29.1 Alternate Pin Function Description
- 29.2 Alternate Pin Functions
30. Peripheral Module Address Map
31. Instruction Set Summary
32. Packaging information
- 32.1 64A
- 32.2 64M2
33. Electrical Characteristics TBD
34. Typical Characteristics TBD
35. Errata
- 35.1 ATxmega32C4
  - 35.1.1 rev. H
- 35.2 ATxmega16C4
  - 35.2.1 rev. H
36. Datasheet Revision History
- 36.1 8493A – 02/12
Table of Contents

8493A–AVR–02/12

XMEGA C4

It is possible to disable the TWI drivers in the device, and enable a four-wire digital interface for

connecting to an external TWI bus driver. This can be used for applications where the device

operates from a different V

voltage than used by the TWI bus.

PORTC and PORTE each has one TWI. Notation of these peripherals are TWIC and TWIE.