原标题：Microchip PIC32MX系列32位MCU音频开发方案

　　microchip公司的PIC32MX系列32位MCU采用80MHz/105DMIPS性能的MIPS microAptiv或M4K内核,集成了开发嵌入式项目所需的所有工具,通信接口包括USB 2.0兼容的全速OTG控制器,10/100 Mbps以太网MAC,CAN模块,支持LIN 1.2协议和IrDA®,多达4个4线SPI模块(25Mbps),5个I2C模块等.主要用在高度紧凑图像/用户接口,以太网/USB/CAN连接,多任务嵌入控制和高性能音频设备.本文介绍了PIC32MX5XX/6XX/7XX系列主要特性,框图以及PIC32音频开发板DM320011主要特性,电路入和PCB元件布局图.

　　Microchip’s 32-bit portfolio with the MIPS microAptiv or M4K core offer high performance microcontrollers, and all the tools needed to develop your embedded projects. With MPLAB® Harmony software framework, 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!

　　PIC32MX5XX/6XX/7XX主要特性:

　　Operating Conditions

　　• 2.3V to 3.6V, -40℃ to +105℃, DC to 80 MHz

　　Core: 80 MHz/105 DMIPS MIPS32® M4K®

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

　　• Code-efficient (C and Assembly) architecture

　　• Single-cycle (MAC) 32x16 and two-cycle 32x32 multiply

　　Clock Management

　　• 0.9% internal oscillator

　　• Programmable PLLs and oscillator clock sources

　　• Fail-Safe Clock Monitor (FSCM)

　　• Independent Watchdog Timer

　　• Fast wake-up and start-up

　　Power Management

　　• Low-power management modes (Sleep and Idle)

　　• Integrated Power-on Reset, Brown-out Reset

　　• 0.5 mA/MHz dynamic current (typical)

　　• 41 μA IPD current (typical)

　　Graphics Features

　　• External graphics interface with up to 34 Parallel MasterPort (PMP) pins:

　　- Interface to external graphics controller

　　- Capable of driving LCD directly with DMA andinternal or external memory

　　Analog Features

　　• ADC Module:

　　- 10-bit 1 Msps rate with one Sample and Hold (S&H)

　　- 16 analog inputs

　　- Can operate during Sleep mode

　　• Flexible and independent ADC trigger sources

　　• Comparators:

　　- Two dual-input Comparator modules

　　- Programmable references with 32 voltage points

　　Timers/Output Compare/Input Capture

　　• Five General Purpose Timers:

　　- Five 16-bit and up to two 32-bit Timers/Counters

　　• Five Output Compare (OC) modules

　　• Five Input Capture (IC) modules

　　• Real-Time Clock and Calendar (RTCC) module

　　Communication Interfaces

　　• USB 2.0-compliant Full-Speed OTG controller

　　• 10/100 Mbps Ethernet MAC with MII and RMII interface

　　• CAN module:

　　- 2.0B Active with DeviceNet™ addressing support

　　• Six UART modules (20 Mbps):

　　- Supports LIN 1.2 protocols and IrDA® support

　　• Up to four 4-wire SPI modules (25 Mbps)

　　• Up to five I2C modules (up to 1 Mbaud) with SMBussupport

　　• Parallel Master Port (PMP)

　　Direct Memory Access (DMA)

　　• Up to eight channels of hardware DMA with automaticdata size detection

　　• 32-bit Programmable Cyclic Redundancy Check (CRC)

　　• Six additional channels dedicated to USB, Ethernet andCAN modules

　　Input/Output

　　• 15 mA or 10 mA source/sink for standard VOH/VOL andup to 22 mA for non-standard VOH1

　　• 5V-tolerant pins

　　• Selectable open drain and pull-ups

　　• External interrupts

　　Qualification and Class B Support

　　• AEC-Q100 REVG (Grade 2 -40ºC to +105ºC) planned

　　• Class B Safety Library, IEC 60730

　　Debugger Development Support

　　• In-circuit and in-application programming

　　• 4-wire MIPS® Enhanced JTAG interface

　　• Unlimited program and six complex data breakpoints

　　• IEEE 1149.2-compatible (JTAG) boundary scan

　　PIC32MX5XX/6XX/7XX应用:

　　High Impact Graphics/User Interfaces

　　Ethernet/USB/CAN Connectivity

　　Multitasking Embedded Control

　　High Performance Audio

　　图1.PIC32MX5XX/6XX/7XX框图

　　PIC32音频开发板DM320011

　　Audio Development Board for PIC32 MCUs

　　The audio development board for PIC32 (DM320011) provides developers a flexible platform for 24-bit audio record and playback, USB Digital Audio, MP3 Decode and Sample Rate Conversion.

　　The audio board can be easily connected through the MFi dock edge connector to the accessory development platform for iPod and iPhone enabling users to develop applications for iPod and iPhone.

　　图2.PIC32音频开发板DM320011外形图

　　PIC32音频开发板DM320011主要特性:

　　On-board PIC32MX795F512 with 80 MIPS of performance, 512KB Flash and 128KB of RAM

　　24-bit Wolfson CODEC

　　USB Type A interface

　　On-board Microphone

　　Headphone out and Line in

　　High quality 2” Color LCD

　　Pre-loaded demo code

　　MFi Dock Edge Connector

　　图3.PIC32音频开发板DM320011电路图(1)

　　图4.PIC32音频开发板DM320011电路图(2)

　　图5.PIC32音频开发板DM320011电路图(3)

　　图6.PIC32音频开发板DM320011电路图(4)

　　图7.PIC32音频开发板DM320011电路图(5)