ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 16

• Manufacturer Part Number: ATxmega256A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3U

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.6 to 3.6
• Operating Voltage (vcc): 1.6 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

9. Event System
9.1
9.2
8386A–AVR–07/11
Features
Overview
•
•
•
•
•
•
The Event System is system for direct peripheral to peripheral communication and signaling. It
enables the possibility for a change in one peripheral to automatically trigger actions in others
peripherals. It is designed for having a predictable system for short and guaranteed response
time between peripherals. It is simple and powerful since it allows for autonomous peripheral
control and interaction without use of interrupts, CPU or DMA Controller resources. It also
enables synchronized timing of actions in several peripheral modules.
The change in a peripheral is referred to as an event, and is it usually the same as the interrupt
conditions for the peripheral. These events can be directly passed to other peripherals using a
dedicated routing network called the Event Routing Network. How events are routed and used
by other peripherals is configured in software.
Figure 9-1 on page 17
System can directly connect together Analog and Digital converters, Analog Comparators, I/O
ports pins, the Real-time Counter, Timer/Counters, IR Communication Module (IRCOM), and
USB. It can also be used to trigger DMA transactions (DMA Controller). Events can also be gen-
erated from software and the Peripheral Clock.
System for direct peripheral to peripheral communication and signaling
Peripherals can directly send, receive and react to peripheral events
8 Event Channels for up to 8 different and parallel signal routines and configurations
Events can be sent and/or used by most peripherals, clock system and software
Additional functions include
Works in Active mode and Idle sleep mode
– CPU and DMA controller independent operation
– 100% predictable signal timing
– Short and guaranteed response time
– Quadrature Decoders
– Digital Filtering of I/O pin change
shows a basic block diagram of all connected peripherals. The Event
XMEGA A3U
16