ATxmega192A3U Atmel Corporation, ATxmega192A3U Datasheet - Page 189

• Manufacturer Part Number: ATxmega192A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega192A3U

• Flash (kbytes): 192 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): 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

15. TC2 –16-bit Timer/Counter type 2
15.1
15.2
8331A–AVR–07/11
Features
Overview
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A Timer/Counter 2 is realized when a Timer/Counter 0 is set in Split Mode. It is a system of two
8-bit Timer/Counters with 4 compare channels each This give eight configurable Pulse Width
Modulation (PWM) channels with individually controlled duty cycles, and is intended for applica-
tions that require ha high number of PWM channels.
The two 8-bit Timer/Counters are in this system referred to as the Low Byte Timer/Counter and
High Byte Timer/Counter, respectively. The difference between them is that only the Low Byte
Timer/Counter can be used to generate compare match interrupts, events and DMA triggers.
The two 8-bit Timer/Counters have shared clock source, and separate Period and Compare set-
tings. They can be clocked and timed from the Peripheral Clock with optional prescaling or from
the Event System. The Counters are always counting down.
The High Resolution (Hi-Res) extension can be used to increase the waveform output resolution
by up to eight times, by using an internal clock source running up to four times faster than the
Peripheral Clock.
The Timer/Counter 2 is set back to Timer/Counter 0 by setting it in Normal Mode, hence one
Timer/Counter can only exist as either type 0 or 2.
A detailed block diagram of the Timer/Counter 2 showing the Low Byte (L) and High Byte (H)
Timer/Counter register split and compare modules is shown in
A system of two 8-bit Timer/Counters
8 Compare Channels
Waveform Generation
Timer Underflow Interrupts / Events
One Compare Match interrupt / event per Compare Channel for the Low Byte Timer/Counter
Can be used with Event System For
Can be used to trigger DMA transactions
High-Resolution Extension
– Low Byte Timer/Counter
– High Byte Timer/Counter
– 4 Compare Channels for the Low Byte Timer/Counter
– 4 Compare Channels for the High Byte Timer/Counter
– o Single Slope Pulse Width Modulation
– Count control
– Increases frequency and waveform resolution by 4x or 8x
Atmel AVR XMEGA AU
Figure 15-1 on page
190.
189