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Microchip公司的PIC32系列MCU采用5級流水線MIPS32® M4K® 32位內核,工作頻率80MHz,在零等待狀態閃存接入時的性能為1.56 DMIPS/MHz (Dhrystone 2.1), MCU工作電壓2.3V- 3.6V,具有眾多的外設,有兩個編程和調試接口,多達16路10位ADC和兩個模擬比較器,主要用于超小型圖像/用戶接口,以太網/USB/CAN/連接,多任務嵌入控制和高性能音頻.本文介紹了PIC32 MCU主要特性,方框圖,以及PIC32音頻開發板主要特性及主要元件,電路圖和PCB布局圖. 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 zero 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 • 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 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 8-channels of hardware DMA with automatic data size detection • USB 2.0-compliant full-speed device and On-The-Go (OTG) controller: - Dedicated 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 oscillator Peripheral Features (Continued): • Internal 8 MHz and 32 kHz oscillators • Six UART modules with: - 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 (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 Joint Test Action Group (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: - 1 Msps conversion rate - Conversion available during Sleep and Idle • Two Analog Comparators PIC32 MCU主要應用: High Impact Graphics/User Interfaces Ethernet/USB/CAN/Connectivity Multitasking Embedded Control High Performance Audio 
圖1.PIC32 MCU方框圖 PIC32音頻開發板 Audio Development Board 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 board also provides an interface to Microchip’s 16/32-bit PIC® MCU Accessory Development Platform for iPod and iPhone enabling Apple® authorized MFi licensees. PIC32音頻開發板主要特性: • 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
圖2.音頻開發板外形圖和元件分布圖 音頻開發板元件表:
圖3.音頻開發板電路圖:顯示電路
圖4.音頻開發板電路圖:音頻電路
圖5.音頻開發板電路圖:MCU和USB電路
圖6.開發板電路圖:電源電路
圖7.音頻開發板電路圖:通信電路(擴展連接器,ICSP,開關和LED)
圖8.音頻開發板PCB布局圖:頂層 詳情請見: 
61156G.pdf
(5.22 MB)
ADB for PIC32 User Guide.pdf
(1.08 MB)
來源：網絡 |
