his part of IEC 62779 defines a functional type of a semiconductor interface for human body communication (HBC). An interface for HBC includes an electrode that is physical structure to transmit a data signal to the human body or receive a transmitted data signal from the body. An electrode directly contacts with the human body in many cases, but it cannot maintain the contact condition when an object, such as clothes, exists between the interface and the body or a near field communication is required; hence, depending on the contact condition, an interface for HBC can be categorized into a contact and non-contact type as shown in Figure 1. This part includes the categorization of the interface for HBC according to the contact condition; and performance parameters characterizing the interface of each category.