Functionalities overview. STMicroelectronics STSW-ST25001

UM2131

User manual

ST25 Android™ NFC tap application

Introduction

This document describes the functionalities of the ST25 Android™ NFC tap application, helping the user to understand the application features and how to use them.

The ST25 Android™ NFC tap application is linked to the STSW-ST25001 and 

STSW-ST25002 software categories, and operates with products belonging to the 

ST25 NFC / RFID Tags and ST25 Dynamic NFC tags.

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Contents

Contents

3

4

UM2131

List of acronyms and definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.1

Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.2

Functionalities overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Application description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1

Welcome screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

3.2

Tag detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

3.2.1

3.2.2

3.2.3

3.2.4

3.2.5

Tag info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

NDEF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

CC file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

SYSTEM file . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Memory dump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.3

NDEF editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3.1

3.3.2

3.3.3

NDEF editor access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

NDEF editor operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

NDEF records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Tag main features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.1

Memory features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.1.1

4.1.2

4.1.3

4.1.4

Read memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Write memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Dump memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Fill memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4.2

Registers management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.3

Configuration protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

4.4

Areas management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

4.5

Areas security status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

4.5.1

4.5.2

4.5.3

4.5.4

Area password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

R/W permissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Present password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Change password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

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Contents

4.6

Mailbox management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.7

Data transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

4.8

Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

4.9

Tamper detect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

4.10

Lock block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

4.11

Untraceable mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

4.12

Kill tag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

4.13

Electronic article surveillance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

4.14

Pulse-width modulation configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.15

Pulse-width modulation control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Demonstrations use cases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.1

Stopwatch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

5.2

Firmware update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

5.3

Picture transfers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

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List of figures

List of figures

UM2131

Figure 1.

ST25 Android™ NFC tap application overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2.

Welcome screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 3.

Tag detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 4.

Tag info screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 5.

NDEF screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 6.

CC file screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7.

System file screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 8.

Memory dump screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 9.

NDEF editor access screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 10.

NDEF edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 11.

Discover an NDEF multi record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 12.

NDEF TEXT screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 13.

NDEF URI screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 14.

NDEF VCard screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 15.

NDEF AAR screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 16.

NDEF Wi-Fi

®

screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 17.

NDEF Bluetooth

®

screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 18.

NDEF SMS screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 19.

NDEF Email screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 20.

NDEF Bluetooth

®

LE screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 21.

Tag features access examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 22.

Read memory screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 23.

Write memory screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 24.

Dump memory screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 25.

Fill memory screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 26.

Registers management screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 27.

Configuration protection screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 28.

Areas management screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 29.

Area security status screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 30.

Area password screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 31.

R/W permissions screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Figure 32.

Present password screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 33.

Change password screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 34.

Mailbox management screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 35.

Data transfer screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 36.

Counter configuration screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 37.

Tamper detect screens (ST25TV tags). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 38.

Lock block screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 39.

Untraceable mode screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Figure 40.

Kill tag screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Figure 41.

Electronic article surveillance screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Figure 42.

Electronic article surveillance alarm screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Figure 43.

PWM configuration features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Figure 44.

PWM control (normal mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 45.

PWM control (expert mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 46.

PWM control (musics mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 47.

Stopwatch screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 48.

Firmware update screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

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Figure 49.

Picture transfer screens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

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List of acronyms and definitions

1 List of acronyms and definitions

UM2131

AAR : Android™ Application Record

BLE : Bluetooth ® Low Energy

CC : Capability container

DAR : Display aspect ratio

FW : Firmware

I 2 C : Inter-integrated circuit

IEC : International Electro-technical Commission

ISO : International Organization for Standardization

ISO/IEC 14443 : Proximity standard

ISO/IEC 15693 : Vicinity standard

NDEF : NFC data exchange format

NFC : Near field communication

NFC Forum : Association of industry actors promoting the NFC technology

PWD : Password

PWM : Pulse-width modulation

RF : Radio frequency

Tag : PICC in form of a patch, key fob or any similar device, without own power source and not generating RF electromagnetic field, capable of communicating with a reader / writer

PICC (VICC) : Proximity (vicinity) IC card: a technology subset, defined in ISO/IEC standards for cards, with a defined set of commands

URI : Unified resource identifier

URL : Unified resource locator

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2 Overview

Overview

2.1 Prerequisites

Note:

The prerequisites to run the Android™ application are:

 an Android™ mobile phone or reader with NFC enabled

 minimum Android version: API level 15 corresponding to Android™ 4.0.4

(Ice Cream

Sandwich)

The ST25 Android™ NFC tap application is available on:

 ST site: www.st.com

 Google play: https://play.google.com/store/apps/details?id=com.st.st25nfc

Pictures used within this document illustrate the various application features. They are based on version 1.0.0 of the application. Some discrepancies may be noticed between this documentation and the application itself.

Figure 1. ST25 Android™ NFC tap application overview

Note: For more details regarding ST25 devices, refer to their corresponding datasheets (available on www.st.com

).

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Overview UM2131

Thanks to the ST25 Android™ NFC tap application the user can manage the following

STMicroelectronics products:

 Tags:

– ST25TN series NFC Tags

– ST25TV series NFC Tags

– ST25TA series NFC/RFID Tags

– LRI EEPROM tags

 Dynamic tags:

– ST25DV-I2C series Dynamic NFC Tags

– ST25DV-PWM series Dynamic NFC Tags

– M24SR series Dynamic NFC Tags

– M24LR series Dynamic NFC Tags

The application supports the ISO14443 protocol to communicate with NFC tags (ST25TA and ST25TN series) and Dynamic NFC tags (M24SR series), and the ISO15693 protocol to communicate with NFC tags (ST25TV and LRI series) and Dynamic NFC tags 

(ST25DV-I2C, ST25DV-PWM and M24LR series).

The ST25 Android™ NFC tap application demonstrates the following product features:

 Read / Write NDEF message, NFC forum compliant example

– Text, URI, SMS, Email, VCard, AAR, Wi-Fi

®

, Bluetooth

®

 Tag information retrieval (CC file, System file (a) )

 Tools functionalities (counters and GPO control according to tag)

(a)

 Password management (password authentication, tag Read Only/Write Only) (a)

 Energy harvesting

(a)

 Specific use cases usually implemented to work with STMicroelectronics Discovery boards and kits (a)

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UM2131 Application description

The application is composed of the following main activities:



Welcome screen (refer to Section 3.1

)



NDEF editor screen (refer to Section 3.3

)



Tag detail screen (refer to Section 3.2

) with a series of tabs dedicated to main features:

– Tag info (refer to

Section 3.2.1

)

–

NDEF (refer to Section 3.2.2

)

– CC file (refer to

Section 3.2.3

)

– SYSTEM file (refer to

Section 3.2.4

)

–

Memory dump (refer to Section 3.2.5

)

 Drawer menu allowing access to tag available features

– NFC forum: 

Tag info, NDEF editor (refer to

Section 3.3.1

), and CC file

– Tag features (refer mostly to

Section 4

): 

System file, memory dump, register management, areas management, areas content editor, areas security status, mailbox management, data transfer, counter, tamper detection, Lock block, Untraceable mode, Kill tag and Electronic article surveillance.

–

Tag demonstrations (refer to Section 5 ):



Stopwatch transfer, firmware update and picture transfer

The following sections describe the main activities and associated functionalities or demonstration use cases included in each tab.

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Application description UM2131

Note:

When the application is started, the welcome screen is displayed (see

Figure 2 ), inviting the

user to “tap” a tag.

When the tag has been discovered, and depending on the product discovered, sections including tabs become available or not.

If NFC is not enabled, a message is displayed inviting to use the NFC configuration menu.

Figure 2. Welcome screen

If a tag is tapped, the application starts the tag detail activity (refer to

Section 3.2

).

The drawer menu is updated according to tag and features. Demonstrations, if any, can be started from drawer menus.

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UM2131 Application description

This activity is started when a tag is discovered. Available screen and tabs are shown in

Figure 3 . Tab availabilities depend on the product discovered.

Figure 3. Tag detail

The following subsections describe the main features of each tab.

 TAG INFO: Provides information dealing with the tag (Manufacturer, Memory size, and

UID among others)

 NDEF: Displays the content of the NDEF, if any, according to the application implemented ones. Refers to the NDEF editor section for available list and screens.

 CC FILE: Provides CC file information if any

 SYSTEM FILE: Provides System file information if any (ST products)

 MEMORY DUMP: Provides ways to Write/Read memory or dump/fill memory to/from file

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Application description UM2131

Provides information related to the tag such as the manufacturer, the memory size or the

UID as shown in Figure 4

.

Figure 4. Tag info screen

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UM2131 Application description

3.2.2 NDEF

The NDEF tab displays the content of the NDEF, if any decoded, according to the application implemented ones as shown in

Figure 5 .

Available lists and screens are detailed in

Section 3.3

.

Figure 5. NDEF screen

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Application description

Provides CC file information (if any), as shown in Figure 6

.

Figure 6. CC file screen

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UM2131 Application description

Provides information retrieved from the System file and more (registers, counter) associated

with the product discovered. as shown in Figure 7

.

Figure 7. System file screen

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Application description UM2131

Refer to Section 4.1

for details about the possibilities provided by this activity. The memory

dump screen is shown in Figure 8

.

Figure 8. Memory dump screen

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UM2131 Application description

3.3.1

The NDEF editor screen enables to create, build, and modify NDEF messages containing one or more records.

NDEF editor access

The NDEF editor can be started from the following main screens:

 Drawer > NDEF editor in the NFC forum menu group for NFC related topics related to

Area 1

 Drawer > Areas Content Editor for tag full features in case of multiple areas available on the tag. This feature first presents the tag areas for selection, then the NDEF editor for the edition of functionalities.

Figure 9 shows NDEF editor access screens.

Figure 9. NDEF editor access screens

3.3.2 NDEF editor operations

The NDEF editor screen enables to read the NDEF content of an NFC tag or write an NDEF message (made of one or more NDEF records) into it. The NDEF editor screen displays all the NDEF records present in the tag.

As shown in

Figure 10

, the user can:

 Click on an NDEF record to view its content and edit it using the pencil icon, or delete it using the recycle bin icon

 Click on the bottom-right ‘+’ button to add an NDEF record, to be selected among all possible types.

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Application description

Figure 10. NDEF edition

UM2131

When a click on a disk pictogram is performed as shown in

Figure 11

, the built message is written on the tag as an NDEF message that can contain multiple records.

Figure 11. Discover an NDEF multi record

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UM2131 Application description

This section describes the main available NDEF records that can be used to compose an

NDEF message within the NDEF editor activity.

TEXT

Displays NDEF TEXT edition fields and enables to write a text NDEF message, as shown in

Figure 12

.

Figure 12. NDEF TEXT screen

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Application description UM2131

URI

Displays NDEF URI edition fields and enables to write a URI NDEF message, as shown in

Figure 13

.

Figure 13. NDEF URI screens

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Contact

Displays NDEF VCard edition fields and enables to write a VCard NDEF message, as

shown in Figure 14 .

Figure 14. NDEF VCard screen

Options:

 GetContact button to get a contact from the phone list and initiate all fields from the selected contact

 Capture from camera

 Export photo check box used to include the image into the NDEF message

 A slider is available under the picture to adjust the image size to fit within the tag available size

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Application description

AAR

Displays NDEF AAR edition fields and enables to write an AAR NDEF message.

Figure 15. NDEF AAR screen

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The selection of an installed application helps to retrieve the AAR message from an already installed application .

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Wi-Fi

®

Displays NDEF Wi-Fi ® edition fields and enables to write a Wi-Fi ® NDEF message.

Figure 16. NDEF Wi-Fi ® screen

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Application description UM2131

Bluetooth

®

Displays NDEF Bluetooth ® edition fields and enables to write a Bluetooth ® NDEF message.

Figure 17. NDEF Bluetooth ® screen

SMS

Displays NDEF SMS edition fields and enables to write an SMS NDEF message.

Figure 18. NDEF SMS screen

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Email

Displays NDEF Email edition fields and enables to write an email NDEF message.

Figure 19. NDEF Email screen

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Application description UM2131

Bluetooth

®

Low Energy

Displays NDEF Bluetooth ® Low Energy edition fields and enables to write a BLE NDEF

message, as shown in Figure 20 .

Figure 20. NDEF Bluetooth ® LE screen

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4 Tag main features

Tag main features

This section describes the tag main features that can be reached from the

Drawer > <Tag name> features menu. Examples for various tags are shown in

Figure 21

.

Figure 21. Tag features access examples

The memory features illustrated in

Section 4.1.1

to Section 4.1.4

provide ways of reading or writing to tag memory with the possibility to store or restore memory content to or from a file.

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The read memory feature enables to dump a number of bytes from the memory starting at a given address. Read memory screen examples are shown in

Figure 22 .

Figure 22. Read memory screens

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The write memory feature enables to write a given value to the memory at a given address.

A write memory screen example is shown in

Figure 23

.

Figure 23. Write memory screen

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The dump memory feature enables to write to a given file a number of bytes from the memory starting at a given address. A dump memory screen example is shown in

Figure 24

.

Figure 24. Dump memory screen

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The fill memory feature enables to write the content of a given file to the memory starting at a given address. A fill memory screen example is shown in

Figure 25 .

Figure 25. Fill memory screen

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This section illustrates the way to configure tag registers if any. The configuration of tag registers is tag-implementation specific including:

 Display of registers values

 Change of registers values

 Refresh of registers values

 Tag update and write of values to tag

Registers management examples are shown in

Figure 26 .

Figure 26. Registers management screens

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The configuration protection screen is specific to some tags like ST25DV-I2C and ST25TV.

The configuration password is needed each time the user wants to change a configuration register.

This screen can be used for:

 The presentation of the configuration password

 Changing the configuration password

 Permanently locking the configuration. In that case, it is not be possible anymore to change any register through RF.



Note: it is still possible to unlock the products with an I 2

ST25DV-I2C tags, through their I 2 C interface.

C interface, like the 

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Figure 27. Configuration protection screen

Tag main features

This section illustrates the way to configure the tag memory with areas. This configuration is tag-dependent and tag-implementation specific.

Areas management example screens are shown in

Figure 28 .

Figure 28. Areas management screens

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Tag main features

4.5 Areas security status

UM2131

This section and its sub-sections illustrate the way to configure the tag areas security status, usually composed of a password and R/W permission. The configuration of tag areas security status is tag-dependent and tag-implementation specific including:

 Change of area password

 Change of area R/W permission

 Password presentation

 Password change

The area security status main screen is shown in Figure 29 .

Figure 29. Area security status screen

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Figure 30

shows a tag area password configuration example.

Figure 30. Area password screen

Tag main features

Figure 31

shows a tag R/W attributes configuration example.

Figure 31. R/W permissions screens

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Tag main features

Figure 32

shows a tag password presentation example.

Figure 32. Present password screens

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Figure 33

illustrates how to change tag passwords.

Figure 33. Change password screens

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This section illustrates the way to configure the tag mailbox. The configuration of the tag mailbox is specific to the tag and possible for ST25DV-I2C products only. The main configuration items are listed below.

 Mailbox field status

 Refresh status

 Mailbox reset

 Mailbox enable

The mailbox management screen is shown in

Figure 34

.

Figure 34. Mailbox management screen

Note:

The Fast Transfer Mode basic demonstration illustrates the data transfer features of

ST25DV-I2C products. This demonstration is dedicated to the ST25DV-I2C tag and requires a specific firmware driving the TAG through I 2 C on a Discovery board. The firmware reads and/or writes the data to transfer.

Refer to ST25DV-DISCOVERY firmware for details. The Mailbox must be enabled first through firmware or RF (refer to the mailbox management features introduced in

Section 4.6

).

The data transfer features are:

 Send data to tag

 Receive data from tag

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Tag main features

Data transfer is observable by means of:

 A progression bar displayed during the transfer

 A stopwatch counter displayed and triggered by actions

Figure 35

shows examples of data transfer screens.

Figure 35. Data transfer screens

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4.8 Counter

Some tags (like ST25TA02K and ST25TV) have their counter incremented when the user reads from, or writes to their memory, with slight differences (tag-dependent).

 Depending on the features of the tag, the counter configuration screen allows:

 Activating the counter

 Displaying the current value of the counter

 Locking the counter

 Resetting the counter

 Selecting if the counter is incremented by read or write operations

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Figure 36

shows the counter configuration screens for an ST25TV tag as well as for an

ST25TA02K tag.

Figure 36. Counter configuration screens

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Tag main features UM2131

The tamper detection feature is specific to ST25TV tags.

Each time the ST25TV tag is powered on, it checks if there is a closed loop between pins

TD0 and TD1. This feature can be used to check if a good, for example a bottle, has been opened (tampered).

Figure 37

shows the tamper detect screens for an ST25TV tag with the corresponding register for each of the two detection cases.

Figure 37. Tamper detect screens (ST25TV tags)

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This feature is specific to NFC Type 5 tags.

In NFC Type 5 tags, the memory is divided into blocks of a given number of bytes. For

STMicroelectronics Type 5 products, each block is made of 4 bytes.

Thanks to the Lock block screen it is possible to read the status of each block (locked or unlocked) and the permanent lock of any block in the memory. This action is irreversible. It can be used when the user wants to be sure that the content of the block(s) will never be changed.

Figure 38

shows a Lock block screen example.

Figure 38. Lock block screen

The Lock block and Area Read/Write permissions

described in Section 4.5.2

are two

possible means to prevent the modification of parts of the memory:

 Lock block is permanent and must be done for each block one by one

 Area configuration is global and applicable to a whole area. The area can be protected by password for read, write, or both. It also offers a mode for which the content of the area cannot be written anymore. This is the mode for which the reading of the memory is protected by password and the writing is impossible, even if the password is presented.

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Tag main features UM2131

This feature is specific to ST25TV products, it is enabled through the Untraceable mode screen. Once enabled, the tag is no longer seen by NFC Type 5 inventory. However, it is possible to communicate with it if its UID is known. For doing so, the Untraceable mode password must be presented (the UID must be specified in the command). The tag answers to every command.

Figure 39. Untraceable mode screen

Caution: If the Untraceable mode is enabled, the tag cannot be discovered by smartphones.

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This feature is specific to ST25TV products. It can be used to permanently kill the tag.

The Lock kill password button allows preventing modifications of the kill password. Once activated, it is not possible anymore to change the kill password.

Figure 40. Kill tag screen

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4.13 Electronic article surveillance

This feature is specific to ST25TV products.

Electronic article surveillance (EAS) can be used to control goods (e.g. books, CDs, DVDs, and others in a library). NFC gate readers at the library exit raise an alarm each time an article, with EAS enabled, goes through the gate.

Figure 41. Electronic article surveillance screen

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With this screen, the user can:

 Enable Electronic article surveillance

 Set the Electronic article surveillance protection:

– This protection is needed to prevent a user of the library to disable the alarm. Only library employees are able to disable the EAS protection when an article is rented thanks to the configuration password.

– The EAS can be permanently locked. In such a case, it is not possible to disable it and the only way to turn the alarm off is to kill the tag. This can be used when the

EAS is used to protect a product in a shop. Once the product is purchased, the tag can be killed.

 The EAS ID is a 16-bit identifier, which can be set freely to identify the article.

 The EAS Telegram is a text limited to 32 characters describing the article.

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UM2131 Tag main features

The ST25 Android™ NFC tap application demonstrates how the EAS alarm can be handled.

Each time a ST25TV tag is found by the inventory, the application checks if the EAS is

enabled. If it is enabled, it raises an alarm, as illustrated in Figure 42

.

Figure 42. Electronic article surveillance alarm screen

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Tag main features UM2131

This feature is specific to ST25DV-PWM products.

Due to RF high-sensitivity levels, and because of the switching noise generated by a PWM output (by construction), the adjustment of different PWM parameters is proposed to improve the coexistence between the PWM interface and the RF interface:

 PWM output driver trimming

 PWM output coexistence with RF interface

Also available in the configuration, the PWM control access rights, to define R/W permissions and password for PWM control area.

Figure 43. PWM configuration features

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This feature is specific to ST25DV-PWM products.

PWM control enables to set PWM registers using the following main setting attributes:

 Disable/Enable PWM

 Period value

 Pulse-width value

Four profiles are available, with different level of detail and features:

 Normal : sets the duty cycle of each PWM with simple bar sliders (frequency already set through the Expert mode).

 Expert : provides detail setting for PWM attributes and corresponding registers values.

 Auto : demonstrator use case for autonomous changing of the duty cycle on the two channels, like one going up and the other down. Same as the normal profile with automatic setting.

 Musics : demonstrator use case that enables the playback of music note using frequency/period setting. A simple finite music list is available for selection (a buzzer must be connected to the PWM1 output for playback).

The PWM controls are shown in figures

44

to 46 .

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Tag main features

Figure 44. PWM control (normal mode)

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Figure 45. PWM control (expert mode)

Tag main features

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Figure 46. PWM control (musics mode)

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5 Demonstrations use cases

Note:

Demonstrations use cases

The demonstrations are product specific. The available demonstrations related to a given product can be reached through the tag drawer demonstration menu.

Some demonstrations require boards with specific firmwares associated.

5.1 Stopwatch

Note:

Stopwatch demonstration (ST25DV-I2C product only) - Discovery board

This demonstration is dedicated to the ST25DV-I2C tag and requires a specific firmware driving the TAG through I

2

C on a Discovery board. The firmware reads and/or writes the data to transfer.

Refer to ST25DV-DISCOVERY firmware for details.

The stopwatch feature is:

 Stopwatch information transfer between phone and board

Stopwatch observability is provided thanks to a counter, displayed and triggered by actions

The stopwatch screen is shown in Figure 47

.

Figure 47. Stopwatch screen

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Demonstrations use cases UM2131

Note:

Firmware update demonstration (ST25DV-I2C product only) - Discovery board

This demonstration is dedicated to the ST25DV-I2C tag and requires a specific firmware driving the TAG through I

2

C on a Discovery board. The firmware reads and/or writes the data to transfer.

Refer to ST25DV-DISCOVERY firmware for details.

The firmware update feature is:

 Pick a firmware to upload: enables to send file content to host through tag 

Password exchange is part of the transfer protocol. Refer to ST25DV-DISCOVERY firmware documentation for default settings

Firmware update can be monitored thanks to:

 a progression bar displayed during the transfer

 a stopwatch counter displayed and triggered by actions

Figure 48

shows examples of firmware update screens.

Figure 48. Firmware update screens

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Note:

Picture transfer demonstration (ST25DV-I2C product only) - Discovery board

This demonstration is dedicated to the ST25DV-I2C tag and requires a specific firmware driving the TAG through I

2

C on a Discovery board. The firmware reads and/or writes the data to transfer.

Refer to ST25DV-DISCOVERY firmware for details.

The picture transfer features are:

 Send picture to tag

 Receive picture from tag

Picture transfer observability is provided by means of the following status:

 A progression bar is displayed during the transfer

 A stopwatch counter is displayed and triggered by actions

Figure 49

shows examples of picture transfer screens.

Figure 49. Picture transfer screens

Note: For download features, start the demonstration on board first, and then click on the start button of the application.

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Revision history UM2131

Date

27-Feb-2017

30-May-2017

08-Jun-2017

10-Apr-2018

26-Jun-2018

05-Aug-2021

Revision

Table 1. Document revision history

Changes

1

2

3

4

5

6

Initial release.

Full document update in relation with the application update: sections updated and reordered in all chapters. All figures updated.

Updated application URL in Section 2.1: Prerequisites .

Document scope extended to the ST25TV series NFC tags and new feature descriptions added or updated:

– Updated Section 2.2: Functionalities overview

– Updated Section 3.3.2: NDEF editor operations

– Added Section 4.3: Configuration protection

– Added Section 4.8: Counter

– Added Section 4.9: Tamper detect

– Added Section 4.10: Lock block

– Added Section 4.11: Untraceable mode

– Added Section 4.12: Kill tag

– Added Section 4.13: Electronic article surveillance

Application renamed “ST25 Android™ NFC tap application”.

Document scope extended to PWM features:

– Updated Introduction

– Updated Section 2.2: Functionalities overview

– Added Section 4.14: Pulse-width modulation configuration

– Added Section 4.15: Pulse-width modulation control

Updated

Introduction

,

Section 2.2: Functionalities overview ,

Section 4.7: Data transfer ,

Section 5.1: Stopwatch

,

Section 5.2:

Firmware update

and Section 5.3: Picture transfers

.

Updated

Figure 35: Data transfer screens ,

Figure 48: Firmware update screens

and Figure 49: Picture transfer screens .

Minor text edits across the whole document.

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Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products.

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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.

© 2021 STMicroelectronics – All rights reserved

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