Embedded development core board and application thereof

The invention provides an embedded development core board. An onboard device comprises a processor module, a memory, a memory, a start mode selector, a program download port, a quick start selection key and a reset key. A power supply interface, an Ethernet interface, a video output interface, an audio interface, a video input interface, USB interfaces and an expansion interface are arranged, the Ethernet interface is integrated with two paths of GMAC Ethernet controllers, the video output interface is an HDMI2.0 interface, the audio interface is an I2S interface, the video input interface is an MIPI-CSI interface, the USB interfaces comprise a USB2.0 interface and a USB3.0 interface, and the expansion interface is integrated with two paths of GMAC Ethernet controllers. The expansion interface comprises an SDMMC interface, an I2C interface, an SPI interface, a UART interface, an ADC interface, a PWM interface and a GPIO interface; a first BTB connector and a second BTB connector which are used for being conne