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 DocID027948 Rev 1 1/14 www.st.com 1 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 2/14 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 DocID027948 Rev 1 UM1909 List of tables List of tables Table 1. Table 2. Table 3. Ordering info . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 DocID027948 Rev 1 3/14 3 List of figures UM1909 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. 4/14 CLOUD-ST25TA board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 CLOUD-ST25TA functional block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 CLOUD-ST25TA board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 CLOUD-ST25TA schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Using the GPO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 DocID027948 Rev 1 UM1909 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. DocID027948 Rev 1 5/14 13 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 6/14 DocID027948 Rev 1 UM1909 3 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. DocID027948 Rev 1 7/14 13 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 8/14 DocID027948 Rev 1 UM1909 4 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 DocID027948 Rev 1 9/14 13 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. 10/14 DocID027948 Rev 1 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) DocID027948 Rev 1 11/14 13 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. 12/14 DocID027948 Rev 1 UM1909 6 Revision history Revision history Table 3. Document revision history Date Revision 18-Jun-2015 1 Changes Initial release. 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All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2015 STMicroelectronics – All rights reserved 14/14 DocID027948 Rev 1