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Microchip PIC32MX4系列多媒体开发方案

来源： eccn

2019-08-20

类别：工业控制

拍明

原标题：Microchip PIC32MX4系列多媒体开发方案

　　microchip公司的PIC32MX4系列是高性能通用和USB的32位闪存微控制器(MCU),它的MIPS32 M4K内核是32位内核,有5级流水线,最大频率为80MHz,性能达到1.56 DMIPS/MHz (Dhrystone 2.1),MCU工作电压从2.3V到3.6V,闪存32KB到512KB(另有12KB引导闪存),8K到32K SRAM,主要用在嵌入式系统如家庭娱乐, 个人娱乐和家庭网络等.本文介绍了PIC32MX4主要特性,方框图,以及PIC32MX4多媒体板主要特性,方框图,以及各个模块如ZigBee模块,RS-232串行模块, TFT 320x240触摸屏显示器,USB连接器,温度传感器等和MCU连接电路图与多媒体板完整电路图.

　　Microchip’s 32-bit portfolio with the MIPS® M4K® offers high performance microcontrollers, and all the tools needed to develop your embedded project. With free software, low cost development tools, and pin/peripheral compatibility from 16-bit product lines, PIC32 MCUs shorten time to market and allow your designs to grow. PIC32 gives your application the processing power, memory and peripherals your design needs!

　　PIC32MX4主要特性:

　　High-Performance 32-bit RISC CPU:

　　• MIPS32® M4K® 32-bit core with 5-stage pipeline

　　• 80 MHz maximum frequency

　　• 1.56 DMIPS/MHz (Dhrystone 2.1) performance at 0 wait state Flash access

　　• Single-cycle multiply and high-performance divide unit

　　• MIPS16e® mode for up to 40% smaller code size

　　• Two sets of 32 core register files (32-bit) to reduce interrupt latency

　　• Prefetch Cache module to speed execution from Flash

　　Microcontroller Features:

　　• Operating voltage range of 2.3V to 3.6V

　　• 32K to 512K Flash memory (plus an additional 12 KB of boot Flash)

　　• 8K to 32K SRAM memory

　　• Pin-compatible with most PIC24/dsPIC® DSC devices

　　• Multiple power management modes

　　• Multiple interrupt vectors with individually programmable priority

　　• Fail-Safe Clock Monitor Mode

　　• Configurable Watchdog Timer with on-chip Low-Power RC Oscillator for reliable operation

　　Peripheral Features:

　　• Atomic SET, CLEAR and INVERT operation on select peripheral registers

　　• Up to 4-channel hardware DMA with automatic data size detection

　　• USB 2.0-compliant full-speed device and On-The-Go (OTG) controller

　　• USB has a dedicated DMA channel

　　• 3 MHz to 25 MHz crystal oscillator

　　• Internal 8 MHz and 32 kHz oscillators

　　• Separate PLLs for CPU and USB clocks

　　• Two I2C™ modules

　　• Two UART modules with:

　　- RS-232, RS-485 and LIN 1.2 support

　　- IrDA® with on-chip hardware encoder and decoder

　　• Parallel Master and Slave Port (PMP/PSP) with 8-bit and 16-bit data and up to 16 address lines

　　• Hardware Real-Time Clock and Calendar (RTCC)

　　• Five 16-bit Timers/Counters (two 16-bit pairs combine to create two 32-bit timers)

　　• Five capture inputs

　　• Five compare/PWM outputs

　　• Five external interrupt pins

　　• High-Speed I/O pins capable of toggling at up to 80 MHz

　　• High-current sink/source (18 mA/18 mA) on all I/O pins

　　• Configurable open-drain output on digital I/O pins

　　Debug Features:

　　• Two programming and debugging Interfaces:

　　- 2-wire interface with unintrusive access and real-time data exchange with application

　　- 4-wire MIPS® standard enhanced JTAG interface

　　• Unintrusive hardware-based instruction trace

　　• IEEE Standard 1149.2-compatible (JTAG) boundary scan

　　Analog Features:

　　• Up to 16-channel 10-bit Analog-to-Digital Converter:

　　- 1000 ksps conversion rate

　　- Conversion available during Sleep, Idle

　　• Two Analog Comparators

　　• 5V tolerant input pins (digital pins only)

　　图1.PIC32MX4系列方框图

　　PIC32MX4多媒体板

　　The MultiMedia Board® is a compact development system which provides a convenient platform to develop devices with multimedia content. The heart of the system is a 32-bit microcontroller PIC32MX4XXL which is programmed using external programmers ICD2® and ICD3® from Microchip®. The MultiMedia Board features integrated modules such as ZigBee wireless communication, RS-232 serial communication, TFT 320x240 touch screen display, two USB connectors for communication with the microcontroller, temperature sensor, etc.