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.