ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 65

• Manufacturer Part Number: ATxmega128B1
• Manufacturer: Atmel Corporation

Specifications of ATxmega128B1

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 53
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Segment Lcd: 160
• 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
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 8
• Eeprom (bytes): 2048
• 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: 3
• Output Compare Channels: 10
• Input Capture Channels: 10
• Pwm Channels: 10
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

6. Event System
6.1
6.2
8291A–AVR–10/11
Features
Overview
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The event system enables direct peripheral-to-peripheral communication and signaling. It allows
a change in one peripheral’s state to automatically trigger actions in other peripherals. It is
designed to provide a predictable system for short and predictable response times between
peripherals. It allows for autonomous peripheral control and interaction without the use of inter-
rupts or CPU, or DMA controller resources, and is thus a powerful tool for reducing the
complexity, size and execution time of application code. It also allows for synchronized timing of
actions in several peripheral modules.
A change in a peripheral’s state is referred to as an event, and usually corresponds to the
peripheral’s interrupt conditions. Events can be directly passed to other peripherals using a ded-
icated routing network called the event routing network. How events are routed and used by the
peripherals is configured in software.
Figure 6-1 on page 65
can directly connect together analog converters, analog comparators, I/O port pins, the real-time
counter, timer/counter and IR communication module (IRCOM), and USB interface. It can also
be used to trigger DMA transactions (DMA controller). Events can also be generated from soft-
ware and the peripheral clock.
Figure 6-1.
System for direct peripheral-to-peripheral communication and signaling
Peripherals can directly send, receive, and react to peripheral events
Four event channels for up to four different and parallel signal routings 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 state
Event system overview and connected peripherals.
shows a basic diagram of all connected peripherals. The event system
ADC
AC
Software
Port pins
CPU /
Event Routing Network
Controller
System
Event
Controller
IRCOM
DMA
Atmel AVR XMEGA B
Real Time
Prescaler
Counters
Counter
Timer /
clk
USB
PER
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