Mirohip PI32MX5 32位MU多媒体开发方案_电工文摘

Mirohip PI32MX5 32位MU多媒体开发方案

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Microchip 公司的PIC32MX5 是高性能32位MCU，具有USB，CAN和以太网接口，它采用5级流水线的MIPS32® M4K® 32位内核，最大频率达80MHz，1.56 DMIPS/MHz (Dhrystone 2.1)，工作电压2.3V- 3.6V，64KB到512KB闪存，16KB到128KB SRAM多达，8路硬件DMA，USB 2.0兼容的OTG控制器，带MII和RMII接口的10/100Mbps以太网MAC，主要用在消费类和工业应用的多媒体开发，包括高性能图像，音频，无线网络和电容触摸屏。本文介绍PIC32MX5主要特性，方框图，多媒体扩展板方框图，详细电路图和材料清单（BOM）。

New PIC32 Development Tools Support High-Performance Graphics, Audio, Wireless Networking, and Capacitive Touch-Sensing Buttons & Sliders

High-Performance, USB, CAN and Ethernet 32-bit Flash Microcontrollers PIC32MX5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 1.2 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

• 5V tolerant input pins (digital pins only)

图1。PIC32MX5XX/6XX/7XX 系列方框图

图2。PIC32MX5XX/6XX/7XX推荐最低限度连接图

图3。PIC32MX5XX/6XX/7XX 系列时钟方框图

多媒体扩展板

The Multimedia Expansion Board kit contains the following items:

• Multimedia Expansion Board

• Multimedia Expansion Board Information Sheet

图4。多媒体扩展板外形和元件分布图（正面）

The front side of the board includes these key features, as shown in Figure 4:

1. 3.2 inch (8.1 cm) QVGA touch screen display with backlight.

2. Five user-controlled LEDs.

3. Four-way joystick (S2).

4. Fire button (S1).

5. Headphone jack.

6. Line output jack.

7. Microphone input jack.

8. Power LED.

9. I/O expansion connector.

图5。多媒体扩展板外形和元件分布图（背面）

The back side of the board includes these key features, as indicated in Figure 5:

1. Solomon Systech Graphics Controller (SSD1926).

2. microSD card slot.

3. Regulated 3.3V and 1.8V power supply for powering the board via a starter kit or

9-14V power supply.

4. Accelerometer and temperature sensor (BMA150).

5. 24LC08 EEPROM.

6. 2 MB SPI Flash (SST25VF016).

7. 24-bit stereo audio codec (WM8731).

8. CPLD for SPI and Chip Select configuration.

9. PIC32 starter kit connector.

10. Integrated 802.11 wireless connectivity.