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. DMAC – Direct Memory Access Controller
- 9. Event System
- 10. System Clock and Clock options
- 10.1 Features
- 10.2 Overview
- 10.3 Clock Sources
- 10.3.1 32kHz Ultra Low Power Internal Oscillator
- 10.3.2 32.768kHz Calibrated Internal Oscillator
- 10.3.3 32.768kHz Crystal Oscillator
- 10.3.4 0.4 - 16MHz Crystal Oscillator
- 10.3.5 2MHz Run-time Calibrated Internal Oscillator
- 10.3.6 32MHz Run-time Calibrated Internal Oscillator
- 10.3.7 External Clock Sources
- 10.3.8 PLL with 1x-31x Multiplication Factor
- 11. Power Management and Sleep Modes
- 12. System Control and Reset
- 13. WDT – Watchdog Timer
- 14. Interrupts and Programmable Multilevel Interrupt Controller
- 15. I/O Ports
- 16. TC0/1 – 16-bit Timer/Counter Type 0 and 1
- 17. TC2 - Timer/Counter Type 2
- 18. AWeX – Advanced Waveform Extension
- 19. Hi-Res – High Resolution Extension
- 20. RTC – 16-bit Real-Time Counter
- 21. USB – Universal Serial Bus Interface
- 22. TWI – Two-Wire Interface
- 23. SPI – Serial Peripheral Interface
- 24. USART
- 25. IRCOM – IR Communication Module
- 26. AES and DES Crypto Engine
- 27. CRC – Cyclic Redundancy Check Generator
- 28. ADC – 12-bit Analog to Digital Converter
- 29. DAC – 12-bit Digital to Analog Converter
- 30. AC – Analog Comparator
- 31. Programming and Debugging
- 32. Pinout and Pin Functions
- 33. Peripheral Module Address Map
- 34. Instruction Set Summary
- 35. Packaging information
- 36. Electrical Characteristics
- 36.1 ATxmega16A4U
- 36.1.1 Absolute Maximum Ratings
- 36.1.2 General Operating Ratings
- 36.1.3 Current consumption
- 36.1.4 Wake-up time from sleep modes
- 36.1.5 I/O Pin Characteristics
- 36.1.6 ADC characteristics
- 36.1.7 DAC Characteristics
- 36.1.8 Analog Comparator Characteristics
- 36.1.9 Bandgap and Internal 1.0V Reference Characteristics
- 36.1.10 Brownout Detection Characteristics
- 36.1.11 External Reset Characteristics
- 36.1.12 Power-on Reset Characteristics
- 36.1.13 Flash and EEPROM Memory Characteristics
- 36.1.14 Clock and Oscillator Characteristics
- 36.1.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
- 36.1.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
- 36.1.14.3 Calibrated and tunable 32MHz internal oscillator characteristics
- 36.1.14.4 32kHz Internal ULP Oscillator characteristics
- 36.1.14.5 Internal Phase Locked Loop (PLL) characteristics
- 36.1.14.6 External clock characteristics
- 36.1.14.7 External 16MHz crystal oscillator and XOSC characteristic
- 36.1.14.8 External 32.768kHz crystal oscillator and TOSC characteristics
- 36.1.15 SPI Characteristics
- 36.1.16 Two-Wire Interface Characteristics
- 36.2 ATxmega32A4U
- 36.2.1 Absolute Maximum Ratings
- 36.2.2 General Operating Ratings
- 36.2.3 Current consumption
- 36.2.4 Wake-up time from sleep modes
- 36.2.5 I/O Pin Characteristics
- 36.2.6 ADC characteristics
- 36.2.7 DAC Characteristics
- 36.2.8 Analog Comparator Characteristics
- 36.2.9 Bandgap and Internal 1.0V Reference Characteristics
- 36.2.10 Brownout Detection Characteristics
- 36.2.11 External Reset Characteristics
- 36.2.12 Power-on Reset Characteristics
- 36.2.13 Flash and EEPROM Memory Characteristics
- 36.2.14 Clock and Oscillator Characteristics
- 36.2.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
- 36.2.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
- 36.2.14.3 Calibrated and tunable 32MHz internal oscillator characteristics
- 36.2.14.4 32kHz Internal ULP Oscillator characteristics
- 36.2.14.5 Internal Phase Locked Loop (PLL) characteristics
- 36.2.14.6 External clock characteristics
- 36.2.14.7 External 16MHz crystal oscillator and XOSC characteristic
- 36.2.14.8 External 32.768kHz crystal oscillator and TOSC characteristics
- 36.2.15 SPI Characteristics
- 36.2.16 Two-Wire Interface Characteristics
- 36.3 ATxmega64A4U
- 36.3.1 Absolute Maximum Ratings
- 36.3.2 General Operating Ratings
- 36.3.3 Current consumption
- 36.3.4 Wake-up time from sleep modes
- 36.3.5 I/O Pin Characteristics
- 36.3.6 ADC characteristics
- 36.3.7 DAC Characteristics
- 36.3.8 Analog Comparator Characteristics
- 36.3.9 Bandgap and Internal 1.0V Reference Characteristics
- 36.3.10 Brownout Detection Characteristics
- 36.3.11 External Reset Characteristics
- 36.3.12 Power-on Reset Characteristics
- 36.3.13 Flash and EEPROM Memory Characteristics
- 36.3.14 Clock and Oscillator Characteristics
- 36.3.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
- 36.3.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
- 36.3.14.3 Calibrated and tunable 32MHz internal oscillator characteristics
- 36.3.14.4 32kHz Internal ULP Oscillator characteristics
- 36.3.14.5 Internal Phase Locked Loop (PLL) characteristics
- 36.3.14.6 External clock characteristics
- 36.3.14.7 External 16MHz crystal oscillator and XOSC characteristic
- 36.3.14.8 External 32.768kHz crystal oscillator and TOSC characteristics
- 36.3.15 SPI Characteristics
- 36.3.16 Two-Wire Interface Characteristics
- 36.4 ATxmega128A4U
- 36.4.1 Absolute Maximum Ratings
- 36.4.2 General Operating Ratings
- 36.4.3 Current consumption
- 36.4.4 Wake-up time from sleep modes
- 36.4.5 I/O Pin Characteristics
- 36.4.6 ADC characteristics
- 36.4.7 DAC Characteristics
- 36.4.8 Analog Comparator Characteristics
- 36.4.9 Bandgap and Internal 1.0V Reference Characteristics
- 36.4.10 Brownout Detection Characteristics
- 36.4.11 External Reset Characteristics
- 36.4.12 Power-on Reset Characteristics
- 36.4.13 Flash and EEPROM Memory Characteristics
- 36.4.14 Clock and Oscillator Characteristics
- 36.4.14.1 Calibrated 32.768kHz Internal Oscillator characteristics
- 36.4.14.2 Calibrated 2MHz RC Internal Oscillator characteristics
- 36.4.14.3 Calibrated and tunable 32MHz internal oscillator characteristics
- 36.4.14.4 32kHz Internal ULP Oscillator characteristics
- 36.4.14.5 Internal Phase Locked Loop (PLL) characteristics
- 36.4.14.6 External clock characteristics
- 36.4.14.7 External 16MHz crystal oscillator and XOSC characteristic
- 36.4.14.8 External 32.768kHz crystal oscillator and TOSC characteristics
- 36.4.15 SPI Characteristics
- 36.4.16 Two-Wire Interface Characteristics
- 36.1 ATxmega16A4U
- 37. Typical Characteristics
- 37.1 ATxmega16A4U
- 37.1.1 Current consumption
- 37.1.2 I/O Pin Characteristics
- 37.1.3 ADC Characteristics
- 37.1.4 DAC Characteristics
- 37.1.5 Analog Comparator Characteristics
- 37.1.6 Internal 1.0V reference Characteristics
- 37.1.7 BOD Characteristics
- 37.1.8 External Reset Characteristics
- 37.1.9 Power-on Reset Characteristics
- 37.1.10 Oscillator Characteristics
- 37.1.11 Two-Wire Interface characteristics
- 37.1.12 PDI characteristics
- 37.2 ATxmega32A4U
- 37.2.1 Current consumption
- 37.2.2 I/O Pin Characteristics
- 37.2.3 ADC Characteristics
- 37.2.4 DAC Characteristics
- 37.2.5 Analog Comparator Characteristics
- 37.2.6 Internal 1.0V reference Characteristics
- 37.2.7 BOD Characteristics
- 37.2.8 External Reset Characteristics
- 37.2.9 Power-on Reset Characteristics
- 37.2.10 Oscillator Characteristics
- 37.2.11 Two-Wire Interface characteristics
- 37.2.12 PDI characteristics
- 37.3 ATxmega64A4U
- 37.3.1 Current consumption
- 37.3.2 I/O Pin Characteristics
- 37.3.3 ADC Characteristics
- 37.3.4 DAC Characteristics
- 37.3.5 Analog Comparator Characteristics
- 37.3.6 Internal 1.0V reference Characteristics
- 37.3.7 BOD Characteristics
- 37.3.8 External Reset Characteristics
- 37.3.9 Power-on Reset Characteristics
- 37.3.10 Oscillator Characteristics
- 37.3.11 Two-Wire Interface characteristics
- 37.3.12 PDI characteristics
- 37.4 ATxmega128A4U
- 37.4.1 Current consumption
- 37.4.2 I/O Pin Characteristics
- 37.4.3 ADC Characteristics
- 37.4.4 DAC Characteristics
- 37.4.5 Analog Comparator Characteristics
- 37.4.6 Internal 1.0V reference Characteristics
- 37.4.7 BOD Characteristics
- 37.4.8 External Reset Characteristics
- 37.4.9 Power-on Reset Characteristics
- 37.4.10 Oscillator Characteristics
- 37.4.11 Two-Wire Interface characteristics
- 37.4.12 PDI characteristics
- 37.1 ATxmega16A4U
- 38. Errata
- 39. Datasheet Revision History
- Table of Contents
34
XMEGA A4U [DATASHEET]
Atmel-8387H-AVR-ATxmega16A4U-34A4U-64A4U-128A4U-Datasheet_09/2014
15.4 Input sensing
Input sensing is synchronous or asynchronous depending on the enabled clock for the ports, and the configuration is
shown in Figure 15-7.
Figure 15-7. Input sensing system overview.
When a pin is configured with inverted I/O, the pin value is inverted before the input sensing.
15.5 Alternate Port Functions
Most port pins have alternate pin functions in addition to being a general purpose I/O pin. When an alternate function
is enabled, it might override the normal port pin function or pin value. This happens when other peripherals that
require pins are enabled or configured to use pins. If and how a peripheral will override and use pins is described in
the section for that peripheral. “Pinout and Pin Functions” on page 55 shows which modules on peripherals that
enable alternate functions on a pin, and which alternate functions that are available on a pin.
INVERTED I/O
Interrupt
Control
IREQ
Event
Pn
D
Q
R
D
Q
R
Synchronizer
INn
EDGE
DETECT
Asynchronous sensing
Synchronous sensing
EDGE
DETECT