ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 150

• Manufacturer Part Number: ATXMEGA256A3B-MH
• Description: MCU AVR 256KB FLASH A3B 64-QFN
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA256A3B-MH

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 256KB (128K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 16x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Processor Series: ATXMEGA256x
• Core: AVR8
• Data Bus Width: 8 bit, 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 49
• Number Of Timers: 7
• Operating Supply Voltage: 1.6 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 12 bit, 2 Channel
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATXMEGA256A3B-MU; ATXMEGA256A3B-MU

8077H–AVR–12/09
Figure 14-1. 16-bit Timer/Counter and Closely Related Peripheral
The 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, waveform generation (FRQ or PWM) or various input cap-
ture operations.
Compare and capture cannot be done at the same time, i.e. a single Timer/Counter cannot
simultaneously perform both waveform generation and capture operation. When used for com-
pare operations, the CC channels is referred to as compare channels. When used for capture
operations, the CC channels are referred to as capture channels.
The Timer/Counter comes in two versions: Timer/Counter 0 that has four CC channels, and
Timer/Counter 1 that has two CC channels. Hence, all registers and register bits that are related
to CC channel 3 and CC channel 4 will only exist in Timer/Counter 0.
All Timer/Counter units are connected to the common peripheral clock prescaler, the Event Sys-
tem, and their corresponding general purpose I/O port.
Some of the Timer/Counters will have Extensions. The function of the Timer/Counter Extensions
can only be performed by these Timers. The Advanced Waveform Extension (AWeX) can be
used for Dead Time Insertion, Pattern Generation and Fault Protection. The AWeX Extension is
only available for Timer/Counter 0.
Waveform outputs from a Timer/Counter can optionally be passed through to a Hi-Resolution
(Hi-Res) Extension before forwarded to the port. This extension, running at up to four times the
Peripheral Clock frequency, to enhance the resolution by four times. All Timer/Counters will
have the Hi-Res Extention.
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
Capture
Control
Prescaler
System
AWeX
Event
Dead-Time
Insertion
DTI
clk
PER
Generation
Protection
Pattern
Fault
XMEGA A
clk
PER4
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