ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 66

• 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

6.3
6.3.1
6.3.2
8291A–AVR–10/11
Events
Signaling Events
Data Events
The event routing network consists of four software-configurable multiplexers that control how
events are routed and used. These are called event channels, and allow for up to four parallel
event configurations and routings. The maximum routing latency is two peripheral clock cycles.
The event system works in both active mode and idle sleep mode.
In the context of the event system, an indication that a change of state within a peripheral has
occurred is called an event. There are two main types of events: signaling events and data
events. Signaling events only indicate a change of state while data events contain additional
information about the event.
The peripheral from which the event originates is called the event generator. Within each periph-
eral (for example, a timer/counter), there can be several event sources, such as a timer compare
match or timer overflow. The peripheral using the event is called the event user, and the action
that is triggered is called the event action.
Figure 6-2.
Events can also be generated manually in software.
Signaling events are the most basic type of event. A signaling event does not contain any infor-
mation apart from the indication of a change in a peripheral. Most peripherals can only generate
and use signaling events. Unless otherwise stated, all occurrences of the word ”event” are to be
understood as meaning signaling events.
Data events differ from signaling events in that they contain information that event users can
decode to decide event actions based on the receiver information.
Although the event routing network can route all events to all event users, those that are only
meant to use signaling events do not have decoding capabilities needed to utilize data events.
How event users decode data events is shown in
Timer/Counter
Over-/Underflow
Compare Match
Event Source
Example of event source, generator, user, and action.
Error
|
Event Generator
Network
Routing
Event
Table 6-1 on page
Atmel AVR XMEGA B
Event User
Event Action Selection
67.
Event Action
Syncsweep
Conversion
ADC
Single
66