Circuit structure and signal encoding method for a serial ATA external physical layer

A signal encoding method for a serial advanced technology attachment (ATA) external physical layer applying to data signal transmission between said serial ATA external physical layer and a storage medium controller, the method comprising:

• providing said serial ATA external physical layer;
• providing said storage medium controller;
• providing an integrated drive electronics (IDE) bus operatively coupling said serial ATA external physical layer to said storage medium controller;
• providing at least six continuous uniform bits as an identification symbol for various status signals and various control signals when an 8-bit parallel data signal of a parallel ATA external physical layer is converted into a 10-bit parallel data signal;
• and
• encoding said at least six continuous uniform bits in the 10-bit parallel data signal during a data conversion process, whereby the various control signals and status signals are encoded into the 10-bit parallel data signal to be transmitted.