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<strong>NFC</strong>-A Technology4 <strong>NFC</strong>-A TechnologyThis section specifies the <strong>NFC</strong>-A Technology-related features of the <strong>NFC</strong> Forum Device.Information defined elsewhere is included for readability reasons.If not explicitly stated otherwise, [ISO/IEC_18092] is the normative reference for this section.Deviations from and restrictions of [ISO/IEC_18092] are indicated within the text on the topicsfor which deviations and restrictions apply.4.1 Sequence FormatThis section describes the sequence format for <strong>NFC</strong>-A Technology.4.1.1 Poll→Listen ModulationIn Poll Mode, the analog signal is modulated using Modified Miller coding with ASK 100%modulation, as illustrated in Figure 1.Figure 1: Modified Miller Coding with ASK 100%The modulation principle of ASK 100% of the Operating Field is used to create V 2 . Refer to[ANALOG] for the definition of V 2 .Modified Miller coding uses these V 2 to define three particular patterns: X, Y, and Z.<strong>NFC</strong> <strong>Digital</strong> <strong>Protocol</strong> Page 15
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