2013‐09‐27 NUR‐05WL2 Implementation Guide v1.
013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Change history Version Date Author Remarks 0.1 2.1.2013 Toni Heijari initial version 0.2 6.3.2013 Toni Heijari minor additions 0.3 4.4.2013 Toni Heijari changed sections 1.3 and 4.1 1.0 12.6.2013 Toni Heijari first released version 1.1 2.9.2013 Toni Heijari Changed section 11.2 and 11.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Table of contents 1 2 3 4 5 6 7 8 GENERAL DESCRIPTION ......................................................................................................................... 5 1.1 Block diagram.................................................................................................................................... 5 1.2 Key features .........................................................................................................
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 9 8.2 Channel scanner ............................................................................................................................. 24 8.3 Received signal strength (RSSI) ..................................................................................................... 24 DIMENSIONS ............................................................................................................................................... 25 9.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 1 GENERAL DESCRIPTION NUR‐05WL2 is a next generation compact UHF RFID reader / writer module. It is compatible with ISO18000‐6C (EPC C1G2) standard. Module fulfills ETSI, FCC and IC radio regulations. It is also compatible with DRM (dense reader mode) requirements. Maximum output power is +27dBm and it can be adjusted via SW API with 1 dB steps. Maximum sensitivity is ‐80dBm. 1.1 BLOCK DIAGRAM 1.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 1.3 TYPICAL APPLICATION SCHEMATICS Typical application schematic including: USB connection with ESD protection circuitry, 2 GPIO outputs for LED indicators, GPIO trigger input, NUR‐05WL2 module and MMCX antenna connector. A simple application schematic.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 2 ELECTRICAL CHARACTERISTICS 2.1 ABSOLUTE MAXIMUM RATINGS Violating these values may cause damage to the module. Also correct operation is not guaranteed if operating outside these values. NUR‐05WL2 is ESD sensitive component so it must be handled with care. Absolute maximum ratings Value Operating temperature ‐20°C to +55°C Storage temperature (package unopened) ‐30°C to +85°C Supply voltage and enable +6.0V GPIO pins +4.0V Other pins +4.0V 2.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 2.4 PERFORMANCE CHARACTERISTICS The performance of the reader module is highly dependent on the test environment, reader antenna and tag performance. Interferences from other radio sources operating in the same frequency may decrease the performance. Also the tag antenna and the tag IC may have significant effect on the values presented below. Also selected radio and inventory parameters have got a big influence to reading performance.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 3 PIN ASSIGNMENTS 3.1 PIN DESIGNATION Through top view. 3.2 PIN MAPPING Pin number Signal name Pin type Description 1 RFU Bidirectional RFU (do not connect) 2 GPIO_5 Bidirectional 3.3V GPIO 3 GPIO_4 Bidirectional 3.3V GPIO 4 GPIO_3 Bidirectional 3.3V GPIO 5 GPIO_2 Bidirectional 3.3V GPIO 6 GPIO_1 Bidirectional 3.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 This pin is used for module UART input signal. Logic level is 3.3V. If UART is used for communication the pin should be connected to the Host MCU serial TX port. Signal name: TX Pin number(s): 9 This pin is used for module UART output signal. Logic level is 3.3V. If UART is used for communication the pin should be connected to the Host MCU serial RX port. Signal name: USB_DN Pin number(s): 10 This pin is used as USB_D‐ device port.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 4 4.1 OEM DESIGN CONSIDERATIONS RF OUTPUT AND ANTENNA REQUIREMENTS The RF output / input impedance is 50Ω so the trace leaving from the RF_OUT pin shall be kept in that same impedance level to avoid reflections and mismatch of the RF signal. To provide an appropriate impedance match place the matching components close to RF_OUT pin.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 4.3 USB DEVICE PORT USB_DP, USB_DN and USB_DET pins are used to provide 2.0 compliant USB device port. It must be remembered that only one communication method can be used to communicate with the NUR‐05WL2 module at the time. Connecting the USB will automatically prevent communication via serial port. It is advised to use external ESD protection component if connected to user accessible USB connector.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 5 5.1 RF PARAMETERS TX LEVEL The maximum output power is +27dBm (500mW). The power can be adjusted by 1dB steps. In total there are 19 steps meaning the minimum output power value is +8dBm that equals to 6mW of power. When using higher output power levels the antennas VSWR value becomes more and more important factor.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 tuning does not match the RF_OUT with an antenna so the good VSWR (return loss) of the antenna is an essential factor of the good performance of the system. 5.4 MODULATION It is possible to use ASK (amplitude shift keying) or PR‐ASK (phase reversed amplitude shift keying) modulation. Tags that are compliant with ISO18000‐6C (EPC C1G2) must support both of these modulations.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Like stated above the Miller sub‐carrier encoding scheme affects also tag to reader data rate. In practice the Miller encoding value affects the number of clock cycles that tag uses to modulate one symbol. So when using higher Miller encoding schemes tag to reader data rate will be slower but at the same time it is more robust to interferences. Also tags response spectrum is more concentrated around the link frequency when using higher Miller schemes.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 2 People's Republic of China 920.5 – 924.5 MHz / 250 kHz 3 Malaysia 919 – 923 MHz / 500 kHz 4 Brazil 915 – 928 MHz / 500 kHz 5 Australia 920 – 926 MHz / 500 kHz 6 New Zealand 921.5 – 928 MHz / 500 kHz 7 Japan 250mW LBT 916.8 – 923.4 MHz / 200 kHz 8 Japan 916.8 – 920.4 MHz / 200 kHz 9 Custom 840 – 960 MHz If you want to use custom frequencies or hop tables you need to feed parameter described below.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 6 6.1 READING PARAMETERS Q‐VALUE The Q‐value defines the amount of open response slots that tags can use per one inventory round. Number of slots can be calculated by formula 2Q. It is advised to use twice as much slots compared to amount of tags that you have in your readers reading field simultaneously. Selectable values are 0 – 15 and value 0 means automatic Q‐value adjustment.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Table indicating persistence characteristics of gen2 tags. Flag Persistence: tag power ON Persistence: tag power OFF S0 indefinite none S1 500ms < t < 5s 500ms < t < 5s S2 indefinite t > 2s S3 indefinite t > 2s By changing the target setting from A target to B target reader is able to read also tags that has flipped its state to B state. This would happen if tags would have been read recently using Session 1 2 or 3.
13‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Besides Q‐value one important parameter is session. In general it could be stated that if the size of tag population is measured in thousands rather than in hundreds it is wise to use sessions 2 or 3. Because then every tag will be read only once and that makes large tag population much faster and easier to read. When using session 2 or 3 it is advised to use Miller 8 encoding scheme to avoid data transfer errors as much as possible.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 7 GPIO CONFIGURATIONS NUR‐05WL2 has 5 programmable GPIOs. All of them can be used as an input or output. They can be also configured to have different predefined functions. 7.1 INPUT / OUTPUT All GPIOs can be configured via SW API to be inputs or outputs. IO voltage level is 3.3V and maximum source current is 3mA and sink current 6mA. When configured as input SW API can check what the state (high / low) of the GPIO pin is.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 function can be used for example driving a LED indicator. Note that this function requires a “scan tag” or “inventory” trigger from another GPIO pin set as an input. Beeper (GPIO type: OUTPUT) When “beeper” function is used will GPIO pin drive high for a short period of time after a timeout has surpassed after last successful tag reading. The timeout can be defined as a parameter for the function.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 8 8.1 DIAGNOSTIC FUNCTIONS REFLECTED POWER MEASUREMENTS This measurement can be used to check what is the matching of the antenna(s) and feed line(s). When this function is triggered will NUR‐05WL2 module put carrier wave ON at full power and then measure the absolute power level that is coming to receiver port. Attenuation in the RX‐line is 11 dB and full output power is 27 dBm.
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2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 All measures are in mm.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 10 SMT ASSEMBLY PROCESS AND THERMAL PROCESSING NUR‐05WL2 module contains single sided assembly of SMT components reflow‐soldered on multilayer HDI (high density interconnections) glass‐fiber re‐enforced epoxy printed board. The bottom side terminations are ENIG (NiP/Au) plated. Soldering alloy used for attaching module components is eutectic SnAgCu. Module internal components soldering has been optimized for minimal thermal stress.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 MSL level and open time MSL level 5 Open time (floor life out of the 48h bag) 10.2 SOLDERING PROCESS Boundary conditions Acceptable soldering methods Convection reflow in air or nitrogen atmosphere Condensation reflow soldering (vapor phase) Recommended stencil thickness 125um ±10um Pad design on motherboard See recommended pad pattern Stencil openings See recommended stencil pattern Recommended solder alloy SnAg3.8±0.2Cu0.7±0.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 ‐delta T on assembly max. 10°C at end of preheating Soldering phase ‐total duration 190s ‐max. time above 217°C (mp.) 30s ‐Tpeak max. 235°C, measured at module bottom ‐Tpeak max.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 11 REGULATORY AGENCIES INFORMATION When OEM prefers to leverage Nordic ID’s grants and certifications of the NUR‐05WL2 UHF RFID module, the host device documentation shall include regulatory compliance information on the NUR‐05WL2 module.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Česky [Czech] [name of manufacture] tímto prohlašuje, že tento [type of apparatus] je ve shodě sezákladními požadavky a dalšími příslušnými ustanoveními směrnice1999/5/ES. Dansk [Danish] Undertegnede [name of manufacture] erklærer herved, at følgende udstyr [type of apparatus] overholder de væsentlige krav og øvrige relevante krav i direktiv 1999/5/EF.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 Italiano [Italian] Con la presente [name of manufacture] dichiara che questo [type of apparatus] è conforme ai requisiti essenziali ed alle altre disposizioni pertinenti stabilite dalla direttiva 1999/5/CE. Latviski [Latvian] Ar šo [name of manufacture] deklarē, ka [type of apparatus] atbilst Direktīvas 1999/5/EK būtiskajām prasībām un citiem ar to saistītajiem noteikumiem.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 [name of manufacture] declara que este [type of apparatus] está conforme com os requisitos essenciais e outras disposições da Directiva 1999/5/CE. Slovensko [Slovenian] [name of manufacture] izjavlja, da je ta [type of apparatus] v skladu z bistvenimi zahtevami in ostalimi relevantnimi določili direktive 1999/5/ES.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 11.2 FCC 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.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 The antenna used with the NUR‐05WL2 transmitter module can have a gain of 8 dBi at the maximum. Higher gain antennas may be used if cable loss compensates the exceeded antenna gain. For example 2dB antenna cable loss reduces EIRP so that 10dBi antenna may be used.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 APPROVED ANTENNAS Option 1: Manufacturer: Nordic ID Antenna Description: Circular polarized patch antenna Frequency range: 902 – 928 MHz Manufacturer Part Number: Sampo S0 Gain: 7dBi Option 2: Manufacturer: TBD Antenna Description: TBD Frequency range: TBD Manufacturer Product Name: TBD Gain: TBD Option 3: Manufacturer: TBD Antenna Description: TBD Frequency range: TBD Manufacturer Product Name: TBD Gain: TBD 11.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 To leverage the Nordic ID’s IC grant, the device with the integrated NUR‐05WL2 module shall be met the following conditions: 1. The antenna used with the NUR‐05WL2 module must be installed so that the distance of the antenna from all persons can be maintained at least 20 cm in every situation. 2.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.1 11.4 INDUSTRIE CANADA 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) 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.
2013‐09‐27 NUR‐05WL2 Implementation Guide v1.
