ISO IEC 17982-2021 pdf Information technology — Telecommunications and information exchange between systems — Close capacitive coupling communication physical layer (CCCC PHY)

4 Conventions and notations The following conventions and notations apply in this document. — A sequence of characters of ‘A’, ‘B ’, ‘C ”, ‘D, ‘E ’ or ‘F ’ and decimal digits in parentheses represent numbers in hexadecimal notation unless followed by a ‘b’ character. — Numbers in binary notation and bit patterns are represented by a sequence of 0 and 1 digits or ‘X ’ characters in parentheses followed by a ‘b’ character, e.g. (0X11X010)b. Where X indicates that the setting of a bit is not specified, and the leftmost bit is the most significant bit unless the sequence is a bit pattern. 5 Conformance Conforming entities implement: — both talker and listener; — listen before talk (LBT) for both talker and listener; — the capability to execute association on FDC2 and to communicate on (FDC0 and FDC1), (FDC3 and FDC4), or (FDC0, FDC1, FDC3 and FDC4); — the capability for talkers and listeners to use any of the 8 TDS on an FDC; — both full duplex and broadcast communication, and pass the tests specified in Annex A . 6 Architecture The protocol architecture of CCCC follows ISO/IEC 7498-1 as the basic model. CCCC devices communicate through mediators, such as conductive and dielectric materials. Plate-electrodes for CCCC device E and F are equivalent to the reference plate-electrode assembly. The plate-electrode A faces to the imaginary point at infinity and the plate-electrode B faces to the mediator. The plate-electrode C faces to the mediator and the plate-electrode D faces to the imaginary point at infinity. See Figure 1 . Figure 2 is the equivalent circuit of Figure 1 . The voltage of X is the potential of the point at infinity. The voltage of Y is the potential of the point at infinity. It is deemed that the potential of X and Y is identical.