Microchip PIC32M795F512音频开发方案

2012年07月27日 10:40 发布者：1770309616

Microchip公司的PIC32M7xx系列是高性能USB,CAN和以太网32位闪存MCU,采用MIPS M4K内核,具有5级流水线,80MHz最高工作频率,1.56 DMIPS/MHz (Dhrystone 2.1),单周期乘法和除法单元,工作电压2.3V 到3.6V,64K到512KB闪存,16KB到128KB SRAM,主要用在超小型图像/用户接口,以太网/USB/CAN连接,多任务嵌入控制和高性能音频设备.本文介绍了PIC32M7xx系列主要特性,方框图,PIC32 MCU音频开发板主要特性,电路图和PCB元件布局图.

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!

PIC32M7xx系列主要特性:

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

PIC32MX7系列应用:

High Impact Graphics/User Interfaces

Ethernet/USB/CAN/Connectivity

Multitasking Embedded Control

High Performance Audio

图1.PIC32M7xx系列框图

PIC32 MCU音频开发板

The Audio Development Board showcases a 16/32-bit audio development platform with a true 24-bit audio codec. In addition, the board also showcases the performance of PIC32 MCU/dsPIC33E DSC for complex audio algorithms.

PIC32 MCU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