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UBX-18009821 - R09

C1-Public

www.u-blox.com

ANNA-B112

Stand-alone Bluetooth 5 low energy module

System integration manual

Abstract

This document describes the system integration of ANNA-B112 stand-alone Bluetooth® low energy
modules. With embedded Bluetooth low energy stack and u-connectXpress software, this module is
tailored for OEMs who wish to have the shortest time-to-market. The OEMs can also embed their
own application using for example the Nordic nRF5 SDK, Wirepas Mesh or Arm® Mbed™ integrated
development environment (IDE).

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Содержание ANNA-B112

Страница 1: ...integration of ANNA B112 stand alone Bluetooth low energy modules With embedded Bluetooth low energy stack and u connectXpress software this module is tailored for OEMs who wish to have the shortest...

Страница 2: ...gos and designs included in this document Copying reproduction modification or disclosure to third parties of this document or any part thereof is only permitted with the express written permission of...

Страница 3: ...10 1 6 1 External crystal 10 1 6 2 Internal oscillator 11 1 6 3 External clock source 11 1 6 4 Low power clock settings for u connectXpress software 12 1 6 5 Selecting clock source 14 Debug serial wi...

Страница 4: ...interface 45 3 5 1 Battery protection 45 General High Speed layout guidelines 46 3 6 1 General considerations for schematic design and PCB floor planning 46 3 6 2 Module placement 46 3 6 3 Layout and...

Страница 5: ...s Page 5 of 66 C1 Public B 3 Reference design for external antennas U FL connector 59 B 4 Examples of application ground plane miniaturizations 61 B 4 1 Example application 1 61 B 4 2 Example applicat...

Страница 6: ...rvice GATT client and server beacons NFC and simultaneous peripheral and central roles all configurable from a host by using AT commands The OEMs can also embed their own application using for example...

Страница 7: ...ANNA B112 System integration manual UBX 18009821 R09 System description Page 7 of 66 C1 Public Product features Table 1 ANNA B112 main features summary...

Страница 8: ...he ANNA B112 module The different software options are described in more detail in section 2 The u connectXpress SW comes with a separate mesh SW variant that is available for download only The ANNA B...

Страница 9: ...a battery the I O voltage level will vary with the battery output voltage depending on the charge of the battery Level shifters might be needed depending on the I O voltage of the host system 1 4 3 V...

Страница 10: ...lock The ANNA B112 module uses a 32 768 kHz low power clock to enable different sleep modes This clock can be generated from an internal or external clock source Different options for generating the c...

Страница 11: ...clock stability 1 6 3 External clock source An external clock source generated from for example a host CPU can also be used The clock source can be either low swing signal or full swing signal The ele...

Страница 12: ...nly once The only way to clear the settings is to erase the flash memory See section 2 3 2 for details on SWD flashing This section describes the AT command and the available settings for the low powe...

Страница 13: ...10 PPM 9 5 PPM 10 2 PPM 11 1 PPM value2 Number When source 0 internal oscillator default 2 Temperature change calibration interval 0 Always calibrate even if the temperature has not changed 1 Invalid...

Страница 14: ...e of current is negligible So if the application will be in standby for longer periods of time then an external crystal might be worth adding Table 7 shows the average current consumption for a beacon...

Страница 15: ...ed to make the UART available either as test points or connected to a header for software upgrade The IO level of the UART will follow the VCC voltage and it can thus be in the range of 1 8 V and 3 6...

Страница 16: ...analog Analog comparator input Compare two voltages capable of generating wake up events and interrupts Any analog PWM output Output complex pulse width modulation waveforms Any Connection status ind...

Страница 17: ...tions 1 10 1 Integrated antenna The ANNA B112 is equipped with a certified integrated antenna in the module To take advantage of the ANNA B112 certification the customer is required to implement the s...

Страница 18: ...ied design that can be used to save costs and time during the certification process The antenna path is routed to a U FL connector and the external antenna is connected to the U FL connector To take a...

Страница 19: ...with the preflashed u connectXpress software The u connectXpress software enables the use of the Bluetooth Low Energy functions controlled by AT commands over the UART interface Examples of supported...

Страница 20: ...nd extract the latest nRF5 SDK available at http www nordicsemi com eng Products Bluetooth low energy nRF5 SDK Save the software container to the directory you want to use with the nRF5 SDK 4 Read the...

Страница 21: ...ode on different platforms 1 Add a build configuration in the Segger Studio project ifndef BOARD_CUSTOM_H define BOARD_CUSTOM_H ifdef __cplusplus extern C endif include nrf_gpio h In this case PIN 25...

Страница 22: ...SDK Figure 6 Setting up board configuration to use evk_anna_b1 h board file The build for your configuration now uses your custom board file 2 2 2 Zephyr Zephyr 16 is a widely adopted open source Rea...

Страница 23: ...m the u blox shortrange open CPU github repository 17 You can copy the configuration to the install directory zephyr boards arm folder and the build the project from your preferred environment Buildin...

Страница 24: ...TOS and drivers for sensors and I O devices With an RTOS core based on the widely used open source CMSIS RTOS RTX Arm Mbed OS supports deterministic multithreaded real time software execution Arm Mbed...

Страница 25: ...T_NRF5 TARGET_MCU_NRF52832 For EVK ANNA B1 the folder is called TARGET_UBLOX_EVK_ANNA_B112 In this new folder there should be two files device h and PinNames h 1 device h contains the include object h...

Страница 26: ...ANNA B112 Figure 10 PinNames h Example code for EVK ANNA B112 ifndef MBED_PINNAMES_H define MBED_PINNAMES_H include cmsis h ifdef __cplusplus extern C endif typedef enum PIN_INPUT PIN_OUTPUT PinDirect...

Страница 27: ...ANNA_B112_IO_35 p19 ANNA_B112_IO_36 p22 ANNA_B112_IO_37 p23 ANNA_B112_IO_38 p24 ANNA_B112_IO_45 p20 EVK ANNA B112 board LED1 ANNA_B112_IO_29 Red LED2 ANNA_B112_IO_30 Green SW1 LED3 ANNA_B112_IO_31 Bl...

Страница 28: ...with an empty flash The MAC address is programmed in the CUSTOMER 0 and CUSTOMER 1 user information configuration registers of the of the nRF52832 chip The address can be read and written using eithe...

Страница 29: ...NNA B112 70B module variants do not have any software preloaded and must be flashed over SWD Flashing of u connectXpress software is normally done over UART If the flash is erased or any other softwar...

Страница 30: ...ce 2 ANNA B112 SWx x x bin contains the application 3 ANNA B112 Configuration x x x json contains the bin file name flash address size and crc for the SoftDevice It also includes the bin file name and...

Страница 31: ...rminal application 1 Connect to the module using Tera Term and set the serial settings as shown in Figure 13 Figure 13 Screenshot that shows serial settings 2 Start the bootloader mode using either of...

Страница 32: ...ce information from the json configuration file Figure 15 Screenshot that shows file transfer mode 4 When the bootloader displays ccc see also Figure 15 it is ready to receive the SoftDevice bin file...

Страница 33: ...nse indicates a successful file transfer Figure 18 Screenshot shown on successful file transfer 6 Verify the transferred file using the command c SOFTDEVICE SoftDevice size SoftDevice CRC32 The size a...

Страница 34: ...shown on successful verification of the transferred file Flashing the application software 1 Use command x Application address to set the bootloader in file transfer mode The application address can...

Страница 35: ...dy to receive the application bin file Figure 23 Screenshot shown during file transfer 3 Send the file using the XMODEM protocol as shown in Figure 23 Figure 24 Screenshot showing how to send the file...

Страница 36: ...ic Semiconductor to flash the module The external debugger SEGGER J Link BASE is verified to work with ANNA B112 The EVK ANNA B112 evaluation kit incorporates an on board debugger and can therefore be...

Страница 37: ...ox webpage the following hex files are available for u connectXpress software SoftDevice s132_nrf52_xxx hex Bootloader ANNA B112_BOOT_xxx hex Application ANNA B112_SW_xxx hex u connectXpress software...

Страница 38: ...e nrfjprog utility as described in section 2 2 5 Restoring the Bluetooth device address When the new u connectXpress software has been flashed to the module it is important to restore the Bluetooth de...

Страница 39: ...out design 9 System functions RESET_N I2C GPIO and other System input and output pins 10 Accurate design is required to guarantee that the voltage level is well defined during module boot 11 Other pin...

Страница 40: ...cted with minimum insertion losses Additional insertion loss will be introduced by low quality or long cable Large insertion loss reduces radiation performance A high quality 50 coaxial connector prov...

Страница 41: ...to comply with the radiation exposure limits specified by regulatory agencies Table 13 Summary of antenna interface requirements for ANNA B112 In both the cases while selecting external or internal an...

Страница 42: ...r are recommended to reduce losses Stack up should allow for thick 50 traces and at least 200 m trace width is recommended to assure good impedance control over the PCB manufacturing process FR 4 mate...

Страница 43: ...oaxial cable may be relatively fragile compared to other types of cables To increase application ruggedness connect U FL connector to a more robust connector such as SMA fixed on panel A de facto stan...

Страница 44: ...ntenna close to buses such as DDR or consider taking specific countermeasures like metal shields or ferrite sheets to reduce the interference Take care of interaction between co located RF systems lik...

Страница 45: ...will give tuning capacitors in the range of 130 pF on each pin For good performance match the total capacitance on NFC1 and NFC2 The ANNA B112 module have been tested with a 3x3 cm PCB trace antenna...

Страница 46: ...tenna to high frequency busses like DDRs and other related components or consider an optional metal shield to reduce interferences that could otherwise be picked up by the antenna and subsequently red...

Страница 47: ...e EMC Directive 89 336 EEC and the Low Voltage Directive 73 23 EEC issued by the Commission of the European Community Compliance with these directives implies conformity to the following European Norm...

Страница 48: ...I EN 301 489 1 ETSI EN 301 489 7 ETSI EN 301 489 24 ANNA B112 is manufactured with consideration to specific standards that minimize the occurrence of ESD events The highly automated process complies...

Страница 49: ...nt of contact when handling the PCB must always be between the local GND and PCB GND Before mounting an antenna patch connect ground of the device When handling the RF pin do not come into contact wit...

Страница 50: ...ss and PCB layout Process parameter Unit Value Pre heat Ramp up rate to TSMIN K s 3 TSMIN C 150 TSMAX C 200 tS from 25 C s 110 tS Pre heat s 60 Peak TL C 217 tL time above TL s 60 TP absolute max C 24...

Страница 51: ...0 17 Modulus 25 C MPa 20000 Modulus 260 C MPa 500 Table 17 Parameters potting If the antenna and or antenna trace is covered by the potting it will affect the RF characteristics of the module This mig...

Страница 52: ...d in detail to improve the production quality This is achieved with automatic test equipment ATE in production line which logs all production and measurement data A detailed test report for each unit...

Страница 53: ...e result The standard operational module firmware and test software on the host can be used to perform functional tests communication with the host controller check interfaces and to perform basic RF...

Страница 54: ...I2C Inter Integrated Circuit JSON JavaScript Object Notation LDO Low Drop Out LED Light Emitting Diode MAC Media Access Control MSL Moisture Sensitivity Level NSMD Non Solder Mask Defined PCB Printed...

Страница 55: ...lidated parts for antenna matching PCB layout must be identical to the one provided by u blox Implement one of the reference designs included in this section or contact u blox The designer must use th...

Страница 56: ...NA B112 System integration manual UBX 18009821 R09 Appendix Page 56 of 66 C1 Public Figure 30 Reference design for internal antenna corner version top layer Traces and vias for other signals not prese...

Страница 57: ...Traces and vias for other signals not present B 2 Internal antenna reference design with module along PCB edge When using the ANNA B112 together with this antenna reference design the circuit trace la...

Страница 58: ...age 58 of 66 C1 Public Figure 32 Reference design for internal antenna edge version top layer Traces and vias for other signals are not present Figure 33 Reference design for internal antenna edge ver...

Страница 59: ...ust be kept as indicated in the reference design The reference design uses a micro coaxial connector that is connected to the external antenna via a 50 pigtail This section describes where the critica...

Страница 60: ...r signals are not present The 50 coplanar micro strip dimensions used in the reference design are stated in Figure 36 and Table 20 The GND plane beneath the RF trace must be intact Figure 36 Coplanar...

Страница 61: ...the left as shown in Figure 3737 is the first example that shows what can be achieved by shrinking the board size The below graph visualizes the correlation between the total radiated power TRP and t...

Страница 62: ...atterns Integrating the graph the TRP is achieved 5 67 dBm A spherical shape is ideal B 4 2 Example application 2 The tiny device in Figure 4040 is an example of building with both range and miniaturi...

Страница 63: ...40 A tiny ANNA B1 application including coin cell battery with the range of about 100 m size 7 5 x 12 mm Theta 60 Phi 45 Theta 1 4 Phi 189 5 Figure 41 The tiny ANNA B1 graphs show the total radiation...

Страница 64: ...ces from electrostatic phenomena General requirements 10 ETSI EN 60950 1 2006 Information technology equipment Safety Part 1 General requirements 11 FCC Regulatory Information Title 47 Telecommunicati...

Страница 65: ...tenna reference designs appendix B Replaced u blox connectivity software with u connectXpress software in all instances Replaced all references to the ANNA B112 GettingStarted guide with the new docum...

Страница 66: ...om Regional Office China Beijing Phone 86 10 68 133 545 E mail info_cn u blox com Support support_cn u blox com Regional Office China Chongqing Phone 86 23 6815 1588 E mail info_cn u blox com Support...

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