ATxmega256A3BU Atmel Corporation, ATxmega256A3BU Datasheet - Page 164

• Manufacturer Part Number: ATxmega256A3BU
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3BU

• 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: 47
• Ext Interrupts: 49
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 8
• Twi (i2c): 2
• Uart: 6
• 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

14. TC0/1 - 16-bit Timer/Counter Type 0 and 1
14.1
14.2
8331A–AVR–07/11
Features
Overview
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AVR XMEGA devices have a set of flexible, 16-bit timer/counters (TC). Their capabilities include
accurate program execution timing, frequency and waveform generation, and input capture with
time and frequency measurement of digital signals. Two timer/counters can be cascaded to cre-
ate a 32-bit timer/counter with optional 32-bit capture.
A timer/counter consists of a base counter and a set of compare or capture (CC) channels. The
base counter can be used to count clock cycles or events. It has direction control and period set-
ting that can be used for timing. The CC channels can be used together with the base counter to
do compare match control, frequency generation, and pulse width waveform modulation, aswell
as various input capture operations. A timer/counter can be configured for either capture or com-
pare functions, but cannot perform both at the same time.
A timer/counter can be clocked and timed from the peripheral clock with optional prescaling or
from the event system. The event system can also be used for direction control and capture trig-
ger or to synchronize operations.
16-bit timer/counter
32-bit timer/counter support by cascading two timer/counters
Up to four compare or capture (CC) channels
Double buffered timer period setting
Double buffered capture or compare channels
Waveform generation:
Input capture:
Timer overflow and error interrupts/events
One compare match or input capture interrupt/event per CC channel
Can be used with event system for:
Can be used with DMA and to trigger DMA transactions
High-resolution extension
Advanced waveform extension:
– Four CC channels for timer/counters of type 0
– Two CC channels for timer/counters of type 1
– Frequency generation
– Single-slope pulse width modulation
– Dual-slope pulse width modulation
– Input capture with noise cancelling
– Frequency capture
– Pulse width capture
– 32-bit input capture
– Quadrature decoding
– Count and direction control
– Capture
– Increases frequency and waveform resolution by 4x (2-bit) or 8x (3-bit)
– Low- and high-side output with programmable dead-time insertion (DTI)
– Event controlled fault protection for safe disabling of drivers
Atmel AVR XMEGA AU
164