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NFC Digital Protocol
Technical Specification
NFC Forum
TM
DIGITAL 1.0
NFCForum-TS-DigitalProtocol-1.0
2010-11-17
RESTRICTIONS ON USE
This specification is copyright © 2005-2010 by the NFC Forum, and was made available pursuant to a
license agreement entered into between the recipient (Licensee) and NFC Forum, Inc. (Licensor) and may
be used only by Licensee, and in compliance with the terms of that license agreement (License). If you are
not the Licensee, you may read this Specification, but are not authorized to implement or make any other
use of this specification. However, you may obtain a copy of this Specification and implementation rights
at the following page of Licensor's website:
http://www.nfc-forum.org/specs/spec_license after entering
into and agreeing to such license terms as Licensor is then requiring. On the date that this specification was
downloaded by Licensee, the non-implementation terms of that license were as follows:
1. LICENSE GRANT.
Licensor hereby grants Licensee the right, without charge, to copy (for internal purposes only) and share
this Specification with Licensee's members, employees and (to the extent related to Licensees use of this
Specification) consultants. This license grant does not include the right to sublicense, modify or create
derivative works based upon the Specification.
2. NO WARRANTIES.
THE SPECIFICATION IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, COMPLETENESS AND
NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL LICENSOR, ITS
MEMBERS OR ITS CONTRIBUTORS BE LIABLE FOR ANY CLAIM, OR ANY DIRECT, SPECIAL,
INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH
THE USE OR PERFORMANCE OF THE SPECIFICATION.
3. THIRD PARTY RIGHTS.
Without limiting the generality of Section 2 above, LICENSOR ASSUMES NO RESPONSIBILITY TO
COMPILE, CONFIRM, UPDATE OR MAKE PUBLIC ANY THIRD PARTY ASSERTIONS OF
PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS THAT MIGHT NOW OR IN THE
FUTURE BE INFRINGED BY AN IMPLEMENTATION OF THE SPECIFICATION IN ITS CURRENT,
OR IN ANY FUTURE FORM. IF ANY SUCH RIGHTS ARE DESCRIBED ON THE SPECIFICATION,
LICENSOR TAKES NO POSITION AS TO THE VALIDITY OR INVALIDITY OF SUCH
ASSERTIONS, OR THAT ALL SUCH ASSERTIONS THAT HAVE OR MAY BE MADE ARE SO
LISTED.
4. TERMINATION OF LICENSE.
In the event of a breach of this Agreement by Licensee or any of its employees or members, Licensor shall
give Licensee written notice and an opportunity to cure. If the breach is not cured within thirty (30) days
after written notice, or if the breach is of a nature that cannot be cured, then Licensor may immediately or
thereafter terminate the licenses granted in this Agreement.
5. MISCELLANEOUS.
All notices required under this Agreement shall be in writing, and shall be deemed effective five days from
deposit in the mails. Notices and correspondence to the NFC Forum address as it appears below. This
Agreement shall be construed and interpreted under the internal laws of the United States and the
Commonwealth of Massachusetts, without giving effect to its principles of conflict of law.
NFC Forum, Inc.
401 Edgewater Place, Suite 600
Wakefield, MA, USA 01880
NFC Digital Protocol Page i
Contents
1 Introduction .................................................................................................... 1
1.1 Scope ............................................................................................................................. 1
1.2 Audience ........................................................................................................................ 1
1.3 Applicable Documents or References ........................................................................... 1
1.4 Administration ............................................................................................................... 3
1.5 Name and Logo Usage .................................................................................................. 3
1.6 Intellectual Property ...................................................................................................... 4
1.7 Acknowledgements ....................................................................................................... 4
1.8 Special Word Usage ...................................................................................................... 4
1.9 Requirement Numbering ............................................................................................... 4
1.10 Implementation of Optional Items ................................................................................. 5
1.11 Notational Conventions ................................................................................................. 5
1.11.1 Notations ......................................................................................................... 5
1.11.2 Value of Parameters ........................................................................................ 5
1.12 Abbreviations ................................................................................................................ 6
1.13 Glossary ......................................................................................................................... 8
1.13.1 Device and Communication ............................................................................ 8
1.13.2 Protocol and Mode ........................................................................................ 10
1.13.3 Errors ............................................................................................................ 10
2 Overview ...................................................................................................... 12
3 Bit Duration .................................................................................................. 14
4 NFC-A Technology ...................................................................................... 15
4.1 Sequence Format ......................................................................................................... 15
4.1.1 Poll→Listen Modulation .............................................................................. 15
4.1.2 Listen→Poll Modulation .............................................................................. 17
4.1.3 Synchronization ............................................................................................ 18
4.1.4 De-synchronization ....................................................................................... 19
4.2 Bit Level Coding ......................................................................................................... 19
4.2.1 Poll→Listen Coding Scheme ........................................................................ 19
4.2.2 Listen→Poll Coding Scheme ........................................................................ 21
4.3 Frame Format .............................................................................................................. 21
4.3.2 Short Frame .................................................................................................. 22
4.3.3 Standard Frame ............................................................................................. 22
4.3.4 Bit Oriented SDD Frame .............................................................................. 23
4.4 Data and Payload Format ............................................................................................ 24
4.5 Command Set .............................................................................................................. 25
4.6 ALL_REQ and SENS_REQ ........................................................................................ 25
4.6.1 ALL_REQ Command ................................................................................... 26
4.6.2 SENS_REQ Command ................................................................................. 26
4.6.3 SENS_RES Response ................................................................................... 26
4.7 SDD_REQ ................................................................................................................... 27
4.7.1 SDD_REQ Command ................................................................................... 28
4.7.2 SDD_RES Response ..................................................................................... 31
4.8 SEL_REQ .................................................................................................................... 34
4.8.1 SEL_REQ Command .................................................................................... 34
4.8.2 SEL_RES Response ...................................................................................... 35
4.9 SLP_REQ .................................................................................................................... 36
NFC Digital Protocol Page ii
4.9.1 SLP_REQ Command .................................................................................... 36
4.9.2 SLP_REQ Response ..................................................................................... 37
4.10 Timing Requirements .................................................................................................. 37
4.10.1 Frame Delay Time Poll→Listen ................................................................... 37
4.10.2 Frame Delay Time Listen→Poll ................................................................... 40
4.10.3 Guard Time ................................................................................................... 42
5 NFC-B Technology ...................................................................................... 43
5.1 Sequence Format ......................................................................................................... 43
5.1.1 Poll→Listen Modulation .............................................................................. 43
5.1.2 Listen→Poll Modulation .............................................................................. 44
5.1.3 Synchronization ............................................................................................ 45
5.1.4 Pattern Synchronization ................................................................................ 48
5.1.5 De-synchronization ....................................................................................... 48
5.2 Bit Level Coding ......................................................................................................... 50
5.2.1 Poll→Listen Coding Scheme ........................................................................ 50
5.2.2 Listen→Poll Coding Scheme ........................................................................ 50
5.3 Frame Format .............................................................................................................. 51
5.4 Data and Payload Format ............................................................................................ 51
5.5 Command Set .............................................................................................................. 52
5.6 ALLB_REQ and SENSB_REQ .................................................................................. 52
5.6.1 ALLB_REQ and SENSB_REQ Command .................................................. 52
5.6.2 SENSB_RES Response ................................................................................ 55
5.7 SLOT_MARKER ........................................................................................................ 62
5.7.1 SLOT_MARKER Command ........................................................................ 62
5.7.2 SLOT_MARKER Response ......................................................................... 63
5.8 SLPB_REQ ................................................................................................................. 63
5.8.1 SLPB_REQ Command ................................................................................. 63
5.8.2 SLPB_RES Response ................................................................................... 63
5.9 Timing Requirements .................................................................................................. 63
5.9.1 Frame Delay Time Poll→Listen ................................................................... 63
5.9.2 Frame Delay Time Listen→Poll ................................................................... 66
5.9.3 Guard Time ................................................................................................... 68
6 NFC-F Technology ....................................................................................... 70
6.1 Sequence Format ......................................................................................................... 70
6.1.1 Modulation .................................................................................................... 70
6.1.2 Synchronization ............................................................................................ 71
6.1.3 De-synchronization ....................................................................................... 73
6.2 Bit Level Coding ......................................................................................................... 73
6.3 Frame Format .............................................................................................................. 73
6.4 Data and Payload Format ............................................................................................ 74
6.5 Command Set .............................................................................................................. 75
6.6 SENSF_REQ ............................................................................................................... 75
6.6.1 SENSF_REQ Command ............................................................................... 75
6.6.2 SENSF_RES Response ................................................................................. 78
6.7 Timing Requirements .................................................................................................. 83
6.7.1 Frame Delay Time Poll→Listen ................................................................... 83
6.7.2 Frame Delay Time Listen→Poll ................................................................... 85
6.7.3 Guard Time ................................................................................................... 87
NFC Digital Protocol Page iii
7 Half-duplex Protocols ................................................................................. 88
8 Type 1 Tag Platform .................................................................................... 89
8.1 Sequence Format ......................................................................................................... 89
8.2 Bit Level Coding ......................................................................................................... 89
8.3 Frame Format .............................................................................................................. 89
8.4 Data and Payload Format ............................................................................................ 90
8.5 Command Set .............................................................................................................. 91
8.6 Read Identifier (RID) .................................................................................................. 92
8.6.1 RID Command .............................................................................................. 92
8.6.2 RID Response ............................................................................................... 93
8.7 Timing Requirements .................................................................................................. 93
8.7.1 Reader-Reader Data Delay ........................................................................... 93
8.7.2 Frame Delay Time ........................................................................................ 94
9 Type 2 Tag Platform .................................................................................... 96
9.1 Sequence Format ......................................................................................................... 96
9.2 Bit Level Coding ......................................................................................................... 96
9.3 Frame Format .............................................................................................................. 96
9.4 Data and Payload Format ............................................................................................ 97
9.5 Command Set .............................................................................................................. 98
9.6 READ .......................................................................................................................... 98
9.6.1 Command ...................................................................................................... 98
9.6.2 Response ....................................................................................................... 98
9.7 WRITE ........................................................................................................................ 99
9.7.1 Command ...................................................................................................... 99
9.7.2 Response ....................................................................................................... 99
9.8 SECTOR SELECT .................................................................................................... 100
9.8.1 SECTOR SELECT Command Packet 1 ..................................................... 100
9.8.2 SECTOR SELECT Command Packet 2 ..................................................... 100
9.8.3 Response ..................................................................................................... 100
9.9 Timing Requirements ................................................................................................ 102
10 Type 3 Tag Platform .................................................................................. 103
10.1 Sequence Format ....................................................................................................... 103
10.2 Bit Level Coding ....................................................................................................... 103
10.3 Frame Format ............................................................................................................ 103
10.4 Data and Payload Format .......................................................................................... 103
10.5 Command Set ............................................................................................................ 104
10.6 Timing Requirements ................................................................................................ 104
11 Type 4A Tag Platform ................................................................................ 106
11.1 Sequence Format ....................................................................................................... 106
11.2 Bit Level Coding ....................................................................................................... 106
11.3 Frame Format ............................................................................................................ 106
11.4 Data and Payload Format .......................................................................................... 106
11.5 Command Set ............................................................................................................ 107
11.6 Request for Answer to Select (RATS) ...................................................................... 107
11.6.1 RATS Command......................................................................................... 107
11.6.2 RATS Response (Answer To Select) .......................................................... 109
11.7 Timing Requirements ................................................................................................ 115
11.7.1 FWT ............................................................................................................ 115
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