JTAG-based burning device

A JTAG-based burning device, comprising a JTAG host, N chips, a master controllable switch module and N controllable switches;

• wherein
• an input terminal of a first controllable switch is connected to a TDI terminal of the JTAG host, a first output terminal is connected to a TDI terminal of a first chip, and a second output terminal is connected to TDI terminals of ith to Nth chips respectively;
• an input terminal of an ith controllable switch is connected to a TDO terminal of an i-1th chip, the first output terminal is connected to an i-1th input terminal of the master controllable switch module, and the second output terminal is connected to the TDI terminal of the ith chip;
• an output terminal of the Nth chip is connected to an Nth input terminal of the master controllable switch module, an output terminal of the master controllable switch module is connected to a TDO terminal of the JTAG host, 2 ≤1≤N;
• the JTAG host is also connected to control terminals of the N controllable switches and a control terminal of the master controllable switch module respectively, and used to, according to a burning instruction, control the corresponding input terminals of the controllable switches to be connected to corresponding output terminals and control the output terminal of the master controllable switch module to be connected to a corresponding input terminal.