NFC Digital Protocol - CWI

Type 2 Tag PlatformTable 52: READ Response FormatByte 1 - 16payloadRefer to [T2TOP] for further details regarding the payload coding.The format of the NACK Response is shown in Table 53.Table 53: NACK Response Formatb4 b3 b2 b1 Meaning0 x 0 x The NACK Response has a value of 0h, 1h, 4h, or 5h.Poll ModeRequirements 110: NACK Response9.6.2.3 When a NACK Response is received by the NFC Forum Device, this MUST be treatedas Protocol Error.9.7 WRITE[T2TOP] is the normative reference for this section.9.7.1 CommandThe format of the WRITE Command is shown in Table 54. Refer to [T2TOP] for further detailsregarding syntax and semantic of the WRITE Command.Byte 1 Byte 2 Byte 3 – 6A2h BNo DataTable 54: WRITE Command Format9.7.2 ResponseIn response to the WRITE Command, the NFC Forum Device returns an ACK or NACKresponse.Requirements 111: WRITE ResponsePoll Mode9.7.2.1 When an ACK Response is received,the WRITE Command MUST betreated as being successful.A NACK Response MUST betreated as Protocol Error.Listen Mode9.7.2.2 If the NFC Forum Device receivesa WRITE Command, it HAS TOreturn an ACK Response or aNACK Response.NFC Digital Protocol Page 99