USB JTAG conversion debugging device internally embedded in chip

The utility model provides a USB JTAG conversion debugging device internally embedded in a chip. A circuit module is arranged in a multi-core chip, one end of the circuit module is connected with a coprocessor in the chip to be used as a control processor, and the other end of the circuit module is connected with a JTAG interface gathering module of debugging processors. Meanwhile, the control processor is connected with a USB receiving and emitting device, and converts commands sent by the USB receiving and emitting device into JTAG signals to debug all the processors through a control processing module. Therefore, a USB JTAG conversion debugging device body arranged between a peripheral PC terminal and a development board is eliminated in the debugging process, and meanwhile online synchronous debugging of a plurality of CPUs in the multi-core chip is supported through software. Development board cost is lowered, and debugging flexibility is improved.