Embedded developing board having strong expansibility

Abstract

The invention provides an embedded developing board having strong expansibility, which comprises four components: a system power supply, a processor minimum system, a board-loading base resource and an expansion function module, wherein the system power supply comprises a USB (universal serial bus) power supply interface, an external power source power supply interface, a self-recovering fuse, a voltage stabilizer, a power self-locking switch, a power light; the processor minimum system comprises a 51 single chip, an AVR (automatic voltage regulation) single chip and an ARM (advanced RISC machine) processor; the board-loading base resource comprises a light-emitting diode, a serial shift register, a 4-bit 8-section common cathode nixie tube, a passive buzzer, a matrix keyboard, an independent interruption key, a serial port circuit, a temperature sensor, a keyboard mouse interface, an infrared receiving circuit, an EEPROM (electrically erasable programmable read-only memory) memory, a real-time clock, a PWM (pulse-width modulation)/ DA (digital to analog) converter, an ADC (analog to digital converter) sampling circuit, a USB interface, a USB conversion serial port chip, a 1602 dot matrix liquid crystal module interface and a 12864 dot matrix liquid crystal module interface; and the expansion function module comprises an SD/MMC (safety data/multi media card) card interface circuit, a TFT (thin film transistor) color liquid crystal touch screen, an audio module, a wireless communication module and a network module.

Description

technical field [0001] The invention relates to an embedded experiment development device, in particular to a multifunctional embedded experiment development board with strong expansibility and supporting multiple single-chip computers and ARM processors. It is used in embedded experiments, teaching, research, and product development fields. Background technique [0002] Traditional embedded development boards only support the same type of microcontroller or ARM processor, and the onboard resources are fixed. This experimental development board has the following obvious disadvantages: [0003] 1. Only the specified processor can be used, and the development board cannot be upgraded; [0004] 2. The resources of the development board are fixed, and the scalability is greatly limited; [0005] 3. It only contains simple functions and cannot satisfy embedded advanced applications; [0006] 4. Due to the fixed processor and resources, the scope of application is small; [0...

AI Technical Summary

Problems solved by technology

[0003] 1. Only the specified processor can be used, and the development board cannot be upgraded;

[0004] 2. The resources of the development board are fixed, and the scalability is greatly limited;

[0005] 3. It only contains simple functions and cannot satisfy embedded advanced applications;

[0006] 4. Due to the fixed processor and resources, the scope of application is small;

[0007] 5. There is no integrated download circuit, and a special downloader needs to be purchased;

[0008] 6. Standard 9-pin RS232 serial ports are required for dow

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