Translation circuit from switching power supply domain parallel interface to normally-open power supply domain serial interface

The invention discloses a translation circuit from a switching power supply domain parallel interface to a normally-open power supply domain serial interface. The translation circuit comprises a control signal detecting module and a serial-parallel conversion module. The control signal detecting module and the serial-parallel conversion module are arranged between a switching power supply domain parallel interface circuit and a normally-open power supply domain serial interface circuit, the control signal detecting module is connected with the switching power supply domain parallel interface circuit through a data bus, an address bus, a control signal and a transmission response signal, and effective data and effective addresses are latched. An answering signal is arranged in the serial-parallel conversion module, and used for a deserializing process, and the answering signal is sent to the control signal detecting module when data transmission is completed. By means of the translationcircuit, on the one hand