ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 33

• 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

8386A–AVR–07/11
A Timer/Counter can be clocked and timed from the Peripheral Clock with optional prescaling or
the Event System. The Event System can also be used for direction control, capture trigger or to
synchronize operations.
Figure 16-1. Overview of a Timer/Counter and closely related peripherals
Figure 16-2. Overview of a Timer/Counter and closely related peripherals
The only difference between Timer/Counter type 0 and 1 is the number of CC Channels.
Timer/Counter 0 has four CC channels, and Timer/Counter 1 has two CC channels. All informa-
tion related to CC channel 3 and 4 is only valid for Timer/Counter 0.
The High Resolution (Hi-Res) extension can be used to increase the waveform output resolution
by up to eight times, by using internal clock source running up to four times faster than the
Peripheral Clock. See
The Advanced Waveform Extension can be enabled to provide extra and more advanced fea-
tures for the Timer/Counter. This are only available for Timer/Counter 0. See
Waveform Extension” on page 34
PORTC, PORTD and PORTE each has one Timer/Counter 0 and one Timer/Counter1. PORTF
has one Timer/Counter 0. Notation of these are TCC0 (Time/Counter C0), TCC1, TCD0, TCD1,
TCE0, TCE1 and TCF0, respectively.
Timer/Counter
Base Counter
Compare/Capture Channel A
Timer Period
Comparator
Compare/Capture Channel B
Counter
Buffer
Compare/Capture Channel C
Compare/Capture Channel D
Control Logic
Generation
Waveform
”Hi-Res - High Resolution Extension” on page 35
Capture
Control
for more details.
Prescaler
System
AWeX
Event
Dead-Time
Insertion
clk
PER
Generation
Protection
Pattern
Fault
XMEGA A3U
for more details.
”AWeX - Advanced
clk
PER4
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