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<strong>NFC</strong>-A TechnologyTable 8: Byte 2 of SENS_RESb8 b7 b6 b5 b4 b3 b2 b1 Meaning0 0 0 0 RFU1 1 0 0 Type 1 Tag platform configurationall other valuesOther than Type 1 Tag platform configurationRequirements 17: <strong>NFC</strong>ID1 LengthPoll Mode4.6.3.1 The <strong>NFC</strong> Forum Device MUSTaccept an <strong>NFC</strong>ID1 of 4, 7, or10 bytes.Listen Mode4.6.3.2 The <strong>NFC</strong>ID1 of the <strong>NFC</strong> ForumDevice MUST have a length of 4, 7,or 10 bytes.NOTEIn [ISO/IEC_18092], the <strong>NFC</strong>ID1 is specified to be only 4 bytes long.Requirement 4.6.3.2 overrules this restriction.Requirements 18: Type 1 Tag Platform ConfigurationPoll Mode4.6.3.3 The <strong>NFC</strong> Forum Device MUSTtreat a SENS_RES Response as<strong>Protocol</strong> Error:• With b5-b1 of Byte 1 set to00000b, but b4-b1 of Byte 2set to a value different from1100b or• With b4-b1 of Byte 2 set to1100b, but b5-b1 of Byte 1set to a value different from00000bListen ModeThe <strong>NFC</strong> Forum Device MAY be configured forType 1 Tag platform and set b5-b1 of Byte 1 to00000b and b4-b1 of Byte 2 to 1100baccordingly.NOTERequirement 4.6.3.3 extends [ISO/IEC_18092].4.7 SDD_REQThe SDD_REQ Command is used to obtain the <strong>NFC</strong>ID1 of an <strong>NFC</strong> Forum Device in ListenMode and to detect whether more than one device of the same Technology is in the OperatingField of the <strong>NFC</strong> Forum Device in Poll Mode. Furthermore, the SDD_REQ Command is used forcollision resolution if there is more than one <strong>NFC</strong> Forum Device in Listen Mode in the OperatingField. Refer to [ACTIVITY] for details regarding the collision resolution mechanism.<strong>NFC</strong> <strong>Digital</strong> <strong>Protocol</strong> Page 27
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