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ATXMEGA16D4-AU Datasheet(PDF) 5 Page - ATMEL Corporation |
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ATXMEGA16D4-AU Datasheet(HTML) 5 Page - ATMEL Corporation |
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5 / 100 page  5 8135G–AVR–08/10 XMEGA D4 3. Overview The XMEGA D4 is a family of low power, high performance and peripheral rich CMOS 8/16-bit microcontrollers based on the AVR® enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the XMEGA D4 achieves throughputs approaching 1 Million Instructions Per Second (MIPS) per MHz allowing the system designer to optimize power con- sumption versus processing speed. The AVR CPU combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction, executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs many times faster than conven- tional single-accumulator or CISC based microcontrollers. The XMEGA D4 devices provide the following features: In-System Programmable Flash with Read-While-Write capabilities, Internal EEPROM and SRAM, four-channel Event System, Pro- grammable Multi-level Interrupt Controller, 34 general purpose I/O lines, 16-bit Real Time Counter (RTC), four flexible 16-bit Timer/Counters with compare modes and PWM, two USARTs, two Two-Wire Interfaces (TWIs), two Serial Peripheral Interfaces (SPIs), one Twelve- channel 12-bit ADC with optional differential input with programmable gain, two analog compar- ators with window mode, programmable Watchdog Timer with separate Internal Oscillator, accurate internal oscillators with PLL and prescaler and programmable Brown-Out Detection. The Program and Debug Interface (PDI), a fast 2-pin interface for programming and debugging, is available. The XMEGA D4 devices have five software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Event System, Interrupt Controller and all peripherals to continue functioning. The Power-down mode saves the SRAM and register contents but stops the oscillators, disabling all other functions until the next TWI or pin-change interrupt, or Reset. In Power-save mode, the asynchronous Real Time Counter continues to run, allowing the appli- cation to maintain a timer base while the rest of the device is sleeping. In Standby mode, the Crystal/Resonator Oscillator is kept running while the rest of the device is sleeping. This allows very fast start-up from external crystal combined with low power consumption. In Extended Standby mode, both the main Oscillator and the Asynchronous Timer continue to run. To further reduce power consumption, the peripheral clock to each individual peripheral can optionally be stopped in Active mode and in Idle sleep mode. The device is manufactured using Atmel's high-density nonvolatile memory technology. The pro- gram Flash memory can be reprogrammed in-system through the PDI. A Bootloader running in the device can use any interface to download the application program to the Flash memory. The Bootloader software in the Boot Flash section will continue to run while the Application Flash section is updated, providing true Read-While-Write operation. By combining an 8/16-bit RISC CPU with In-System Self-Programmable Flash, the Atmel XMEGA D4 is a powerful microcon- troller family that provides a highly flexible and cost effective solution for many embedded applications. The XMEGA D4 devices are supported with a full suite of program and system development tools including: C compilers, macro assemblers, program debugger/simulators, programmers, and evaluation kits. |
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