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1、Microchip PIC32 MCU音频开发方案关键字：工业控制,以太网,高性能音频Microchip公司的PIC32系列MCU采用5级流水线MIPS32 M4K 32位内核,工作频率80MHz,在零等待状态闪存接入时的性能为1.56 DMIPS/MHz (Dhrystone 2.1), MCU工作电压2.3V- 3.6V,具有众多的外设,有两个编程和调试接口,多达16路10位ADC和两个模拟比较器,主要用于超小型图像/用户接口,以太网/USB/CAN/连接,多任务嵌入控制和高性能音频.本文介绍了PIC32 MCU主要特性,方框图,以及PIC32音频开发板主要特性及主要元件,电路图和PCB布
2、局图. MicrochipMicrochips 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 marke
3、t 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 zero Wait
4、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 FlashMicrocontroller Features: Operating voltage range of 2.3V
5、to 3.6V 64K to 512K Flash memory (plus an additional 12 KB of Boot Flash) 16K to 128K 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 Tim
6、er with on-chip Low-Power RC oscillator for reliable operation Peripheral Features: Atomic SET, CLEAR and INVERT operation on select peripheral registers Up to 8-channels of hardware DMA with automatic data size detection USB 2.0-compliant full-speed device andOn-The-Go (OTG) controller:- Dedicated
7、DMA channels 10/100 Mbps Ethernet MAC with MII and RMII interface:Dedicated DMA channels CAN module:- 2.0B Active with DeviceNet addressing support- Dedicated DMA channels 3 MHz to 25 MHz crystal oscillatorPeripheral Features (Continued): Internal 8 MHz and 32 kHz oscillators Six UART modules with:-
8、 RS-232, RS-485 and LIN support- IrDA with on-chip hardware encoder and decoder Up to four SPI modules Up to five I2C modules Separate PLLs for CPU and USB clocks 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 (RT
9、CC) 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 outp
10、ut on digital I/O pinsDebug Features: Two programming and debugging Interfaces:- 2-wire interface with unintrusive access and real-time data exchange with application- 4-wire MIPS standard enhanced Joint Test Action Group (JTAG) interface Unintrusive hardware-based instruction trace IEEE Standard 11
11、49.2 compatible (JTAG) boundary scanAnalog Features: Up to 16-channel, 10-bit Analog-to-Digital Converter:- 1 Msps conversion rate- Conversion available during Sleep and Idle Two Analog ComparatorsPIC32 MCU主要应用:High Impact Graphics/User InterfacesEthernet/USB/CAN/ConnectivityMultitasking Embedded Co
12、ntrolHigh Performance Audio图1.PIC32 MCU方框图PIC32音频开发板Audio Development BoardThe 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 board also provides an interface to
13、Microchips 16/32-bit PIC MCU Accessory Development Platform for iPod and iPhone enabling Apple authorized MFi licensees.PIC32音频开发板主要特性: High-performance MCU Wolfson WM8960 audio codec with up to 48 kHz sampling rate and up to 24-bit resolution Headphone out, Line-in jacks, and an on-board MIC TFT color display with 220x176 resolution PICtail Plus Connector General purpose user switches and LEDs图2.音频开发板外形图和元件分布图音频开发板元件表:图3.音频开发板电路图:显示电路图4.音频开发板电路图:音频电路图5.音频开发板电路图:MCU和USB电路图6.开发板电路图:电源电路AO-Electronics 傲壹电子 官网： 中文网：图7.音频开发板电路图:通信电路(扩展连接器,ICSP,开关和LED)图8.音频开发板PCB布局图:顶层
