ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 32

• 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

16. T/C - 16-bit Timer/Counter
16.1
16.2
8386A–AVR–07/11
Features
Overview
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There are seven flexible 16-bit Timer/Counters (TC). Their capabilities include accurate program
execution timing, frequency and waveform generation, and input capture with time and fre-
quency measurement of digital signals. Two Timer/Counters can be cascaded to create 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 setting 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 modula-
tion, or various input capture operations. A Timer/Counter can be configured for either capture or
compare functions, and not perform both at the same time.
Seven 16-bit Timer/Counters
32-bit Timer/Counter support by cascading two Timer/Counters
Up to 4 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 trigger DMA transactions
High-Resolution Extension
Advanced Waveform Extension
Event controlled fault protection for safe disabling of external drivers
– Four Timer/Counters of type 0
– Three Timer/Counters of type 1
– 4 CC Channels for Timer/Counters of type 0
– 2 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)
XMEGA A3U
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