ATxmega32A4U Atmel Corporation, ATxmega32A4U Datasheet - Page 165

• Manufacturer Part Number: ATxmega32A4U
• Manufacturer: Atmel Corporation

Specifications of ATxmega32A4U

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 4
• Eeprom (bytes): 1024
• 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: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

14.2.1
8331A–AVR–07/11
Definitions
There are two differences between timer/counter type 0 and type 1. Timer/counter 0 has four CC
channels, and timer/counter 1 has two CC channels. All information related to CC channels 3
and 4 is valid only for timer/counter 0. Only Timer/Counter 0 has the split mode feature that split
it into 2 8-bit Timer/Counters with four compare channels each.
Some timer/counters have extensions to enable more specialized waveform and frequency gen-
eration. The advanced waveform extension (AWeX) is intended for motor control and other
power control applications. It enables low- and high-side output with dead-time insertion, aswell
as fault protection for disabling and shutting down external drivers. It can also generate a syn-
chronized bit pattern across the port pins. The high-resolution (hi-res) extension can be used to
increase the waveform output resolution by four or eight times by using an internal clock source
running up to four times faster than the peripheral clock.
A block diagram of the 16-bit timer/counter with extensions and closely related peripheral mod-
ules (in grey) is shown in
Figure 14-1. 16-bit timer/counter and closely related peripherals.
The following definitions are used throughout the documentation:
Table 14-1.
In general, the term “timer” is used when the timer/counter clock control is handled by an internal
source, and the term “counter” is used when the clock control is handled externally (e.g. count-
ing external events). When used for compare operations, the CC channels are referred to as
Name
BOTTOM
MAX
TOP
UPDATE
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
Timer/counter definitions.
Description
The counter reaches BOTTOM when it becomes zero.
The counter reaches MAXimum when it becomes all ones.
The counter reaches TOP when it becomes equal to the highest value in the count
sequence. The TOP value can be equal to the period (PER) or the compare channel
A (CCA) register setting. This is selected by the waveform generator mode.
The timer/counter signals an update when it reaches BOTTOM or TOP, depending on
the waveform generator mode.
Control Logic
Generation
Waveform
Capture
Control
Figure 14-1 on page
Prescaler
System
AWeX
Event
165.
Dead-Time
Insertion
Atmel AVR XMEGA AU
clk
PER
Generation
Protection
Pattern
Fault
clk
PER4
165