Atmel 8284 datasheet: 高性能低功耗AVR微控制器详细特性

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本文档是Atmel公司针对其AVR系列8位微控制器8284的数据手册。该微控制器是一款高性能且低功耗的产品，集成了先进的RISC架构，具有高效能和灵活性。以下是该芯片的主要特点和规格： 1. **强大的处理能力**：8284采用RISC架构，拥有130条强大指令，其中许多可以在单个时钟周期内执行，这显著提高了处理速度。最高工作频率可达16MHz或20MHz，使得它在Atmel ATmega169A/169PA/649A/649P型号上能实现高达16MIPS（每秒百万指令数）的吞吐量，在Atmega329A/329PA/3290A/3290PA/6490A/6490P型号上则可达到20MIPS。 2. **内存配置**： - **闪存程序存储器**：非易失性存储部分非常重要，支持在系统内自我编程。根据型号不同，存储容量从16KB（如ATmega169A/169PA）扩展到64KB（如ATmega649A/649P/6490A/6490P）。 - **EEPROM**：用于存储数据，具有不同的容量，如512B（ATmega169A/ATmega169PA），1KB（ATmega329A/329PA/3290A/3290PA），以及2KB（ATmega649A/649P/6490A/6490P）。 - **内部SRAM**：作为临时数据存储，提供1KB（ATmega169A/169PA），2KB（ATmega329A/329PA/3290A/3290PA），以及4KB（ATmega649A/649P/6490A/6490P）的空间，支持高效的程序运行和数据处理。 3. **电源管理与稳定性**：8284微控制器具备全静态操作特性，无需外部时钟信号，能有效降低功耗。此外，它的高耐用性非易失性存储器确保了长期稳定的数据保存。 4. **内置功能**：芯片还包括一个2周期乘法器，这在处理复杂的算术运算时提供了额外的优势。 5. **写入/擦除寿命**：尽管这些内存区域具有较高的写入和擦除耐久性，但用户仍需注意其限制，比如闪存的写入次数大约为10,000次，而EEPROM的次数则为100,000次，以保持最佳性能和使用寿命。 Atmel 8284微控制器凭借其高性能、灵活的架构、丰富的内存选项和出色的能源效率，是工业级应用的理想选择，适用于需要高效处理能力和长久数据存储的系统设计。

ATmega169A/PA/329A/PA/649A/P/3290A/PA/6490A/P [DATASHEET SUMMARY]

8284FS–AVR–07/2014

single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving

throughputs up to ten times faster than conventional CISC microcontrollers.

The Atmel ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P provides the following

features: 16K/32K/64K bytes of In-System Programmable Flash with Read-While-Write capabilities, 512/1K/2K

bytes EEPROM, 1K/2K/4K byte SRAM, 54/69 general purpose I/O lines, 32 general purpose working registers, a

JTAG interface for Boundary-scan, On-chip Debugging support and programming, a complete On-chip LCD

controller with internal contrast control, three flexible Timer/Counters with compare modes, internal and external

interrupts, a serial programmable USART, Universal Serial Interface with Start Condition Detector, an 8-channel,

10-bit ADC, a programmable Watchdog Timer with internal Oscillator, an SPI serial port, and five software

selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port,

and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the

Oscillator, disabling all other chip functions until the next interrupt or hardware reset. In Power-save mode, the

asynchronous timer and the LCD controller continues to run, allowing the user to maintain a timer base and

operate the LCD display while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU

and all I/O modules except asynchronous timer, LCD controller and ADC, to minimize switching noise during ADC

conversions. In Standby mode, the XTAL/resonator Oscillator is running while the rest of the device is sleeping.

This allows very fast start-up combined with low-power consumption.

Atmel offers the QTouch library for embedding capacitive touch buttons, sliders and wheels functionality into AVR

microcontrollers. The patented charge-transfer signal acquisition offers robust sensing and includes fully

debounced reporting of touch keys and includes Adjacent Key Suppression

(AKS

) technology for unambiguous

detection of key events. The easy-to-use QTouch Suite toolchain allows you to explore, develop and debug your

own touch applications.

The device is manufactured using the Atmel high density non-volatile memory technology. The On-chip In-System

re-Programmable (ISP) Flash allows the program memory to be reprogrammed In-System through an SPI serial

interface, by a conventional non-volatile memory programmer, or by an On-chip Boot program running on the AVR

core. The Boot program can use any interface to download the application program in the Application Flash

memory. 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-bit RISC CPU with In-System Self-Programmable Flash on a monolithic chip, the

ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P is a powerful microcontroller that

provides a highly flexible and cost effective solution to many embedded control applications.

The ATmega169A/169PA/329A/329PA/3290A/3290PA/649A/649P/6490A/6490P AVR is supported with a full

suite of program and system development tools including: C Compilers, Macro Assemblers, Program

Debugger/Simulators, In-Circuit Emulators, and Evaluation kits.

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