Signal interface

A signal receiving circuit, comprising:

• a selector, for receiving a data signal wherein the data signal is a first single-end signal or a differential signal;
• a first register, electrically connected to the selector, the first register registering and outputting the first single-end signal;
• a differential signal receiver, electrically connected to the selector, the differential signal receiver converting the differential signal to a second single-end signal;
• and
• a second register, electrically connected to the differential signal receiver, the second register registering and outputting the second single-end signal.

An operation method of a signal interface, comprising:

• receiving a data signal wherein the data signal is a first single-end signal or a first differential signal;
• if the data signal is the first single-end signal, sending the first single-end signal to a first register and outputting the first single-end signal;
• if the data signal is the first differential signal, converting the first differential signal to a second single-end signal;
• sending the second single-end signal to a second register;
• inputting a second differential signal and converting the second differential signal to a third single-end signal;
• sending the third single-end signal to the second register;
• and
• outputting the second single-end signal and the third single-end signal.