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ATmega3208系列MCU物联网解决方案

发布时间:2020-06-04 发布时间:
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  Microchip公司的ATmega3208/3209/4808/4809是采用AVR®处理器的megaAVR® 0系列MCU,具有工作高达20MHz的硬件乘法器,以及高达48KB闪存储器,6KB SRAM和256B EEPROM,采用最新的技术和灵活的低功率架构,包括事件系统和SleepWalking,精密模拟特性和先进的外设,采用28,32或48引脚封装,主要用在工业,医疗,家庭自动化和物联网(IoT)应用。本文介绍了ATmega3208/3209/4808/4809主要特性, 框图以及开发板AVR-IoT WG主要特性,电路图PCB设计图和材料清单。

  The ATmega3208/3209/4808/4809 microcontrollers of the megaAVR® 0-series are using the AVR®processor with hardware multiplier, running at up to 20 MHz, with a wide range of Flash sizes up to 48 KB, up to 6 KB of SRAM, and 256 bytes of EEPROM in 28-, 32-, or 48-pin package. The series uses the latest technologies from Microchip with a flexible and low-power architecture including Event System and SleepWalking, accurate analog features and advanced peripherals.

  The devices described here offer Flash sizes from 32 KB to 48 KB in a 32-pin package.

  ATmega3208/3209/4808/4809主要特性:

  • AVR® CPU

  – Single-cycle I/O access

  – Two-level interrupt controller

  – Two-cycle hardware multiplier

  • Memories

  – Up to 48 KB In-system self-programmable Flash memory

  – 256B EEPROM

  – Up to 6 KB SRAM

  – Write/Erase endurance:

  • Flash 10,000 cycles

  • EEPROM 100,000 cycles

  – Data retention: 20 Years at 85°C

  • System

  – Power-on Reset (POR) circuit

  – Brown-out Detection (BOD)

  – Clock options:

  • 20 MHz low power internal oscillator with fuse-protected frequency setting

  • 32.768 kHz Ultra Low Power (ULP) internal oscillator

  • 32.768 kHz external crystal oscillator

  • External clock input

  – Single pin Unified Program Debug Interface (UPDI)

  – Three sleep modes:

  • Idle with all peripherals running and mode for immediate wake-up time

  • Standby

  – Configurable operation of selected peripherals

  – SleepWalking peripherals

  • Power Down with limited wake-up functionality

  • Peripherals

  – One 16-bit Timer/Counter type A with dedicated period register, three compare channels (TCA)

  – Three 16-bit Timer/Counter type B with input capture (TCB)

  – One 16-bit Real Time Counter (RTC) running from external crystal or internal RC oscillator

  – Three USART with fractional baud rate generator, autobaud, and start-of-frame detection

  – Master/slave Serial Peripheral Interface (SPI)

  – Dual mode Master/Slave TWI with dual address match

  • Standard mode (Sm, 100 kHz)

  • Fast mode (Fm, 400 kHz)

  • Fast mode plus (Fm+, 1 MHz)

  – Event System for CPU independent and predictable inter-peripheral signaling

  – Configurable Custom Logic (CCL) with up to four programmable Lookup Tables (LUT)

  – One Analog Comparator (AC) with scalable reference input

  – One 10-bit 150 ksps Analog to Digital Converter (ADC)

  – Five selectable internal voltage references: 0.55V, 1.1V, 1.5V, 2.5V, and 4.3V

  – CRC code memory scan hardware

  • Optional automatic scan after reset

  – Watchdog Timer (WDT) with Window Mode, with separate on-chip oscillator

  – External interrupt on all general purpose pins

  • I/O and Packages:

  – 27 programmable I/O lines

  – 32-pin VQFN 5x5 and TQFP 7x7

  • Temperature Range: -40°C to 125°C

  • Speed Grades:

  – 0-5 MHz @ 1.8V – 5.5V

  – 0-10 MHz @ 2.7V – 5.5V

  – 0-20 MHz @ 4.5V – 5.5V, -40°C to 105°C

  

  图1. ATmega3208/3209/4808/4809框图

  开发板AVR-IoT WG

  The AVR-IoT WG development board is a small and easily expandable demonstration and development platform for IoT solutions, based on the AVR® microcontroller architecture using Wi-Fi® technology. It was designed to demonstrate that the design of a typical IoT application can be simplified by partitioning the problem into three blocks:

  • Smart - represented by the ATmega4808 microcontroller

  • Secure - represented by the ATECC608A secure element

  • Connected - represented by the WINC1510 Wi-Fi controller module

  The AVR-IoT WG development board features a USB interface chip Nano Embedded Debugger (nEDBG) that provides access to a serial port interface (serial to USB bridge), a mass storage interface for easy ‘drag and drop’ programming, configuration and full access to the AVR microcontroller UPDI interface for programming and debugging directly from Microchip MPLAB® X IDE and the Atmel® Studio 7.0 IDE. The AVR-IoT WG development board comes preprogrammed and configured for demonstrating connectivity

  to the Google Cloud IoT Core.

  开发板AVR-IoT WG 主要特性:

  • A light sensor

  • A high-accuracy temperature sensor - MCP9808

  

  Additionally, a mikroBUS™ connector is provided to expand the board capabilities with 450+ sensors and actuators offered by MikroElektronika () via a growing portfolio of Click boards™。

  

  图2. 开发板AVR-IoT WG 外形图

  

  图3. 开发板AVR-IoT WG 布局图

  The AVR-IoT WG development board combines a powerful 8-bit ATmega4808 MCU, an ATECC608A CryptoAuthentication™ secure element IC and the fully certified ATWINC1510 Wi-Fi® network controller - which provides the most simple and effective way to connect your embedded application to Google’s Cloud IoT core platform. The board also includes an on-board debugger, and requires no external hardware to program and debug the MCU.

  

  图4. 开发板AVR-IoT WG 电路图(1)

  

  图5. 开发板AVR-IoT WG 电路图(2)

  

  图6. 开发板AVR-IoT WG 电路图(3)

  

  图7. 开发板AVR-IoT WG PCB设计图(1)

  

  图8. 开发板AVR-IoT WG PCB设计图(2)

  

  图9. 开发板AVR-IoT WG PCB设计图(3)

  

  图10. 开发板AVR-IoT WG PCB设计图(4)

  

  图11. 开发板AVR-IoT WG PCB设计图(5)

  

  图12. 开发板AVR-IoT WG PCB设计图(6)

  

  图13. 开发板AVR-IoT WG PCB设计图(7)

  

  图14. 开发板AVR-IoT WG PCB设计图(8)

  

  图15. 开发板AVR-IoT WG PCB设计图(9)

  

  图16. 开发板AVR-IoT WG PCB设计图(10)

  

  图17. 开发板AVR-IoT WG PCB设计图(11)

  开发板AVR-IoT WG材料清单:

  

  


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