原标题：Microchip PIC32MX1XX-2XX蓝牙开发方案

　　microchip公司的PIC32MX1XX/2XX是具有多达256KB闪存和64KB SRAM的32位MCU,并集成了音频和图像接口,USB和先进的模拟功能.处理器内核为50 MHz/83 DMIPS MIPS32® M4K®,工作电压2.3V-3.6V,主要用度高度紧凑图像/用户接口,以太网/B/CAN连接.多任务嵌入控制和高性能音频设备.本文介绍了 PIC32MX1XX/2XX主要特性和框图,MIPS32® M4K®处理器内核主要特性和框图,以及PIC32蓝牙开发板DM320018主要特性,框图,电路图和材料清单.

　　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!

　　PIC32MX1XX/2XX主要特性:

　　Operating Conditions

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

　　• 2.3V to 3.6V, -40℃ to +85℃, DC to 50 MHz

　　Core: 50 MHz/83 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 and Brown-out Reset

　　• 0.5 mA/MHz dynamic current (typical)

　　• 20 μA IPD current (typical)

　　Audio Interface Features

　　• Data communication: I2S, LJ, RJ, and DSP modes

　　• Control interface: SPI and I2C™

　　• Master clock:

　　- Generation of fractional clock frequencies

　　- Can be synchronized with USB clock

　　- Can be tuned in run-time

　　Advanced Analog Features

　　• ADC Module:

　　- 10-bit 1.1 Msps rate with one S&H

　　- Up to 10 analog inputs on 28-pin devices and 13 analog inputs on 44-pin devices

　　• Flexible and independent ADC trigger sources

　　• Charge Time Measurement Unit (CTMU):

　　- Supports mTouch™ capacitive touch sensing

　　- Provides high-resolution time measurement (1 ns)

　　- On-chip temperature measurement capability

　　• Comparators:

　　- Up to three Analog 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

　　• Peripheral Pin Select (PPS) to allow function remap

　　• Real-Time Clock and Calendar (RTCC) module

　　Communication Interfaces

　　• USB 2.0-compliant Full-speed OTG controller

　　• Two UART modules (12.5 Mbps):

　　- Supports LIN 2.0 protocols and IrDA® support

　　• Two 4-wire SPI modules (25 Mbps)

　　• Two I2C modules (up to 1 Mbaud) with SMBus support

　　• PPS to allow function remap

　　• Parallel Master Port (PMP)

　　Direct Memory Access (DMA)

　　• Four channels of hardware DMA with automatic data size detection

　　• Two additional channels dedicated for USB

　　• Programmable Cyclic Redundancy Check (CRC)

　　Input/Output

　　• 10 mA source/sink on all I/O pins and up to 14 mA on non-standard VOH

　　• 5V-tolerant pins

　　• Selectable open drain, pull-ups, and pull-downs

　　• External interrupts on all I/O pins

　　Qualification and Class B Support

　　• AEC-Q100 REVG (Grade 2 -40℃ to +105℃) 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 sca

　　PIC32MX1XX/2XX应用:

　　High Impact Graphics/User Interfaces

　　Ethernet/USB/CAN Connectivity

　　Multitasking Embedded Control

　　High Performance Audio

　　图1. PIC32MX1XX/2XX框图

　　MIPS32® M4K®处理器内核

　　The MIPS32® M4K® Processor Core is the heart of the PIC32MX1XX/2XX family processor. The CPU fetches instructions, decodes each instruction, fetches source operands, executes each instruction and writes the results of instruction execution to the destinations.

　　MIPS32® M4K®处理器内核主要特性:

　　• 5-stage pipeline

　　• 32-bit address and data paths

　　• MIPS32 Enhanced Architecture (Release 2)

　　- Multiply-accumulate and multiply-subtract instructions

　　- Targeted multiply instruction

　　- Zero/One detect instructions

　　- WAIT instruction

　　- Conditional move instructions (MOVN, MOVZ)

　　- Vectored interrupts

　　- Programmable exception vector base

　　- Atomic interrupt enable/disable

　　- Bit field manipulation instructions

　　• MIPS16e® code compression

　　- 16-bit encoding of 32-bit instructions to improve code density

　　- Special PC-relative instructions for efficient loading of addresses and constants

　　- SAVE and RESTORE macro instructions for setting up and tearing down stack frames within

　　subroutines

　　- Improved support for handling 8 and 16-bit data types

　　• Simple Fixed Mapping Translation (FMT) mechanism

　　• Simple dual bus interface

　　- Independent 32-bit address and data buses

　　- Transactions can be aborted to improve interrupt latency

　　• Autonomous multiply/divide unit

　　- Maximum issue rate of one 32x16 multiply per clock

　　- Maximum issue rate of one 32x32 multiply every other clock

　　- Early-in iterative divide. Minimum 11 and maximum 33 clock latency (dividend (rs) sign

　　extension-dependent)

　　• Power control

　　- Minimum frequency: 0 MHz

　　- Low-Power mode (triggered by WAIT instruction)

　　- Extensive use of local gated clocks

　　• EJTAG debug and instruction trace

　　- Support for single stepping

　　- Virtual instruction and data address/value

　　- Breakpoints

　　图2. MIPS32® M4K®处理器内核框图

　　PIC32蓝牙开发板DM320018

　　Thank you for purchasing the Microchip Technology PIC32 Bluetooth® Starter Kit (P/N:DM320018). This starter kit provides a low-cost solution for developing Bluetooth Serial Port Profile (SPP) applications

　　The PIC32 Bluetooth Starter Kit is a low-cost Bluetooth development platform featuring the PIC32MX270F256D MCU. This kit features a HCI-based Bluetooth radio, pushbuttons, Cree high-output multi-color LED, standard single-color LEDs, accelerometer, temperature sensor and GPIO for rapid development of Bluetooth Serial Port Profile (SPP), USB and General Purpose applications.

　　The Starter kit offers an Android App, Demo code and Serial Port Profile stack for free to get you started.

　　The Free Android App & Demo showcases:

　　• Color Mixing of Cree High Output Multi Color LED

　　• Temperature Display

　　PIC32蓝牙开发板DM320018主要特性:

　　• PIC32MX270F256D for Central Processing

　　• Bluetooth HCI module

　　• Cree high output multi-color LED

　　• Analog 3-axis accelerometer

　　• Analog Temp Sensor

　　• 3 standard single color LEDs for display

　　• 5 Push Buttons for user defined inputs

　　• On Board Debugging

　　PIC32蓝牙开发板DM320018包括:

　　• PIC32 Bluetooth Starter Kit development board, which includes:

　　- An integrated HCI-based Bluetooth radio

　　- USB host and device connectors

　　- High output multi-color LED

　　- Accelerometer and temperature sensor.

　　• USB Type-A to B-mini cable for power and debug of the development board

　　图3. PIC32蓝牙开发板DM320018顶层元件布局图

　　图3中的元件对应如下:

　　1. PIC32MX270F256D 32-bit microcontroller (U1).

　　2. CREE high output multi-color LED with PWM input.

　　3. USB Type-A connector to support USB host.

　　4. USB mini-B connector for on-board debugging support.

　　5. Device Reset push button.

　　6. Five user-definable push buttons (SW1-SW5).

　　7. SPI Serial EEPROM (2 Mb).

　　8. Daughter board expansion connector (DAC or codec support).

　　9. Integrated Certified HCI Class 1 Bluetooth radio module.

　　10. Authentication connector.

　　11. Integrated 3-axis accelerometer and temperature sensor.

　　图4. PIC32蓝牙开发板DM320018底层元件布局图

　　图4中对应的元件如下:

　　1. PIC24FJ256GB106 USB microcontroller for on-board debugging.

　　2. USB micro-AB receptacle for USB Host or Device connectivity for PIC32 USB applications.

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

　　PIC32蓝牙开发板DM320018材料清单: