dm00200641

UM1909
User manual
ST25TA NFC Forum Type 4 Tag IC evaluation board
Introduction
The CLOUD-ST25TA is an evaluation board based on the ST25TA02K-P device, allowing to
assess the features and capabilities of the ST25TA circuit series.
The kit consists in a ready-to-use printed circuit board equipped with an ST25TA02K-P
NFC/RFID Tag and a 19 mm single layer inductive antenna etched on the PCB.
The ST25TA is NFC/RFID Tag IC with a General Purpose Output (GPO) that features a
256 Bytes (2 Kbit) EEPROM with NDEF data support. Provision for a connector to operate
the ST25TA GPO is also provided.
The EEPROM is powered and operated through its contactless interface, compliant with
NFC Forum Type 4 Tag and ISO/IEC 14443 Type A.
An external power supply is needed to use the ST25TA GPO.
Figure 1. CLOUD-ST25TA board
Table 1. Ordering info
June 2015
Reference
Order code
CLOUD – ST25TA
CLOUDST25TA02K-P
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Contents
UM1909
Contents
1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
Hardware and layout description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
CLOUD-ST25TA powering and startup . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5
4.1
Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2
Using the GPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Federal Communications Commission (FCC) and
Industry Canada (IC) compliance statements . . . . . . . . . . . . . . . . . . . . 11
5.1
5.2
6
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FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.1.1
Part 15.19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.2
Part 15.105 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1.3
Part 15.21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.2.1
Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2.2
Déclaration de conformité . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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List of tables
List of tables
Table 1.
Table 2.
Table 3.
Ordering info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
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List of figures
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List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
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CLOUD-ST25TA board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CLOUD-ST25TA functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
CLOUD-ST25TA board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CLOUD-ST25TA schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Using the GPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
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1
Features
Features
•
•
•
•
Ready-to-use printed circuit board including:
–
ST25TA02K-P NFC/RFID Tag in UFDFPN5 ECOPACK2® package
–
19 mm single layer inductive antenna etched on the PCB
Contactless interface:
–
NFC Forum Type 4 Tag
–
ISO/IEC 14443 Type A
–
106 kbps data rate
–
Internal 50 pF tuning capacitance allowing small inductive antenna design
Memory:
–
256 Bytes (2 Kbit) EEPROM with NDEF data support
–
200 years data retention
–
1 million erase-write cycles endurance
–
128 bit password data protection
–
20 bit events counter for read or write access with anti-tearing feature
Digital pad
–
•
GPO: configurable General Purpose Output, indicating e.g. RF Field Detection
Associated Android application for smartphone used as a NFC Reader, available on
dedicated web pages on google.com and www.st.com.
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Description
2
UM1909
Description
The CLOUD- ST25TA is a ready-to-use demo board intended to evaluate the
ST25TA02K-P.
The ST25TA02K-P device is a dynamic NFC/RFID tag IC with a digital GPO embedding a
2 Kbit EEPROM that supports NDEF Tag Application for NFC Forum Type 4.
The device communicates using the ISO/IEC 14443 Type A protocol, and it’s fully powered
by the RF field. When the GPO output is used, an external reference voltage is required to
set the high level voltage of the GPO signal: this allows to be directly compatible with the I/O
voltage of the MCU or Host, without the need for any level shifter.
The GPO signal of the ST25TA02K-P is active (HIGH) when asserted and thus can be used
as a rising edge interrupt. It may be configured through the RF interface for various
functions, such as indicating Field Detection (by default) amongst others to wake-up an
MCU or Host like Bluetooth or Wi-Fi chipset.
Figure 2. CLOUD-ST25TA functional block diagram
9'&*
$QWHQQD
677$.3
*
3
2
*32
966
069
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Hardware and layout description
Hardware and layout description
The CLOUD-ST25TA board contains the ST25TA02K-P. It features a 2 Kbit EEPROM
memory with NDEF data support. The memory is only powered and accessed from the RF
interface, based on the ISO/IEC 14443 Type A standard.
The ST25TA02K-P is compatible with the NFC Forum Type 4 Tag specifications and
supports all corresponding commands.
Additionally, the ST25TA02K-P features a GPO which is configurable through the RF
interface and which indicates Tag activity. The GPO pad requests an external supply to
operate.
The antenna has a 19 mm diameter, and it’s etched only on one side of the PCB, as shown
in Figure 3.
Figure 3. CLOUD-ST25TA board description
PPGLDPHWHUHWFKHGDQWHQQD
677$.3
*32
FRQQHFWRUV
069
The electrical schematic diagram is shown in Figure 4, while Table 2 provides the list of
used parts.
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Hardware and layout description
UM1909
Figure 4. CLOUD-ST25TA schematics
GND
ST25TA02K-P Demo Board SCHEMATIC
C2
C1
AC1
0
R1
VDCG
4
AC1
AC0
L1
5
10nF
NC
VCC
1
2
3
GPO
VSS
1
2
3
U1
GND
1
3
Antenna
2
AC0
NC
ST1
ST25TA02K-P
Table 2. Bill of material
Quantity
Description
Reference
Package
Manufacturer
Part
Fitted
1
Capacitor
MLCC 0603 NP0
50V 2% NC
C1
0603
-
-
No
1
Capacitor
MLCC 0603 X7R
16V 10% 10nF
C2
0603
-
-
-
1
Resistor
CMS 0805 0 ohm
L1
0805
-
-
-
1
Resistor
CMS 0603 0,1W
5% NC
R1
0605
-
-
No
1
ST25TA02K-P
U1
UFDFPN5
STMicroelectronics
-
-
1
Connector
3PTS 2,54, NC
ST1
CON_3PTS_P2.54
FCI
77311-401-36LF
No
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CLOUD-ST25TA powering and startup
CLOUD-ST25TA powering and startup
The CLOUD-ST25TA is powered by the RF field which means that users do not need
external power supply for either reading or writing the memory. However, an external power
is needed to use the GPO.
4.1
Startup
The CLOUD-ST25TA is already programmed with an URI which will automatically redirect to
the associated ST web page. User needs to:
•
enable NFC on the phone (Settings → Wireless and Networks → NFC) and make sure
it is also connected to the Internet;
•
bring the phone close to the CLOUD-ST25 antenna to be redirected to ST25TA web
page.
Various uses of the CLOUD-ST25TA with a smartphone are allowed with application for
Android.
To download the application and for more use cases and details user should visit the
dedicated pages on google.com and www.st.com.
4.2
Using the GPO
By default the GPO is not powered on the CLOUD-ST25TA board, however the GPO output
voltage can easily accommodate supply voltage of associated Host. To use the GPO, users
must provide the relevant supply (voltage ranging from 1.65 to 5.5 V) between VSS and
VDCG pins, then probe the GPO behavior with an oscilloscope connected to the GPO pin
(see Figure 5).
Figure 5. Using the GPO
*1'
*32
WR9
069
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CLOUD-ST25TA powering and startup
UM1909
The GPO pin is active positive and by default configured as Field Detection which means
that GPO voltage varies from LOW to HIGH when a field is sufficient to power the
ST25TA02K-P.
User should enable the NFC on the phone, and bring it close to the CLOUD-ST25 antenna
(2 centimeters or less), GPO goes HIGH. Taking the phone away from the Tag, GPO goes
back to LOW.
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UM1909Federal Communications Commission (FCC) and Industry Canada (IC) compliance state-
5
Federal Communications Commission (FCC) and
Industry Canada (IC) compliance statements
5.1
FCC Compliance Statement
5.1.1
Part 15.19
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.
5.1.2
Part 15.105
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference's by one or more of the following measures:
5.1.3
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and the receiver.
•
Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
•
Consult the dealer or an experienced radio/TV technician for help.
Part 15.21
Any changes or modifications to this equipment not expressly approved by
STMicroelectronics may cause harmful interference and void the user’s authority to operate
this equipment.
5.2
IC Compliance Statement
5.2.1
Compliance Statement
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation.
5.2.2
Déclaration de conformité
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils
radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: (1)
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Federal Communications Commission (FCC) and Industry Canada (IC) compliance statements
l’appareil ne doit pas produire de brouillage, et (2) l’utilisateur de l’appareil doit accepter tout
brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le
fonctionnement.
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Revision history
Revision history
Table 3. Document revision history
Date
Revision
18-Jun-2015
1
Changes
Initial release.
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© 2015 STMicroelectronics – All rights reserved
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