Identifying apparatus, apparatus to be identified, identifying method, and printing apparatus

摘要

There is disclosed a main unit as an identifying apparatus for outputting an identification code and subjecting the identification code to encode by an encoding section to obtain a specific code. A process unit as an apparatus to be identifying subjects the identification code outputted from the main unit to the encoding by an encoding section by the same logic as that of the encoding section to obtain a response code, and returns the response code to an input port of the main unit. In the main unit, a collating section collates the specific code obtained by the encoding section and the signal inputted to the input port, and CPU judges the attached process unit to be original when a collation result indicates coincidence.