原标题：MIcrochip PIC32 32位RISC MCU开发方案

　　microchip公司的PIC32系列是高性能通用和USB的闪存微控制器,其中的32位RISCCPU采用5级流水线的MIPS M4K 32位内核,CPU最大工作频率80MHz,具有1.56 DMIPS/MHz (Dhrystone 2.1),而MCU工作电压2.3V-3.6V,32KB-512KB闪存(另加12KB引导闪存)以及8K-32K SRAM存储器.器件具有丰富外设和模拟特性,主要用在消费类电子,工业,医疗电子和汽车电子.本文介绍了PIC32 MCU主要特性,方框图,以及PIC32 MCU入门开发套件主要特性,方框图,电路图和材料厂清单.

　　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!

　　PIC32 MCU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 temperature range of -40ºC to +105ºC

　　• 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 support

　　- IrDA® with on-chip hardware encoder and decoder

　　• Up to two SPI modules

　　• 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

　　PIC32 MCU主要应用:

　　These new MCUs include a host of additional useful features that make them suitable for applications in the consumer, industrial, medical and automotive markets.

　　图1.PIC32 MCU方框图

　　PIC32 MCU入门开发套件

　　PIC32 Starter Kit provides a low-cost, modular development system for Microchip’s line of 32-bit microcontrollers (MCUs).

　　The starter kit comes preloaded with demonstration software for the user to explore the new features of the PIC32. It is also expandable through a modular expansion interface, which allows the user to extend its functionality. The starter kit also supplies on-board circuitry for full debug and programming capabilities.

　　The PIC32 Starter Kit contains the following items:

　　• PIC32 Starter Kit Board

　　• USB Mini-B cable

　　图2.PIC32 MCU入门开发套件外形图

　　PIC32 MCU入门开发套件主要特性:

　　The board includes these key features, as indicated in the diagram:

　　1. PIC32MX360F512L 32-bit microcontroller.

　　2. Green power indicator LED.

　　3. Regulated +3.3V power supply for powering the starter kit board via USB or expansion board.

　　4. On-board crystal for precision microcontroller clocking (8 MHz).

　　5. USB connectivity for on-board debugger communications.

　　6. PIC18LF4550 USB microcontroller for on-board debugging.

　　7. Orange Debug indicator LED.

　　8. Three push-button switches for user-defined inputs.

　　9. Three user-defined indicator LEDs.

　　10. Connector for connecting various expansion boards (on the underside of board).

　　图3.PIC32 MCU入门开发板元件布局图

　　图4.PIC32 MCU入门开发板方框图

　　图5.PIC32 MCU入门开发板电路图: PIC32MX CPU

　　图6.PIC32 MCU入门开发板电路图: PIC18LF4550调试CPU

　　图7.PIC32 MCU入门开发板电路图:应用板连接器

　　图8.PIC32 MCU入门开发板电路图:开关和LED

　　图9.PIC32 MCU入门开发板电路图:电源

　　PIC32 MCU入门开发板材料清单: