Multi-channel synchronous serial communication circuit and method

The invention discloses a multichannel synchronous serial communication circuit and a multichannel synchronous serial communication method, which belong to the field of digital interface communication, and comprise a main control FPGA (Field Programmable Gate Array) and modules 1 to n, the modules 1 to n are the same in composition form, and the multichannel synchronous serial communication circuit mainly comprises an isolation circuit and a control FPGA. According to the invention, three working modes of JTAG debugging, JTAG program downloading and three-wire serial communication are provided; three working modes are adopted, and lead functions are multiplexed and do not interfere with one another; in the main control FPGA, an independent three-wire serial communication wire is adopted tocommunicate with each module to achieve multi-channel control; three-wire serial communication is adopted, and full duplex data transmission can be achieved, so that the transmission efficiency is improved; 64 clock periods