Ublox C212-NORA-B126 User Manual
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Ublox C212-NORA-B126 User Manual

Ublox C212-NORA-B126 User Manual

Nora-b126 bluetooth le audio application board
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C212-NORA-B126
NORA-B126 Bluetooth LE audio application board
User guide
Abstract
The C212-NORA-B126 Bluetooth LE audio application board is designed for evaluation of Bluetooth
LE audio and Auracast applications using the NORA-B1 series modules. Fully compliant with the
Bluetooth 5.3 standard, the board hosts the NORA-B126 stand-alone Bluetooth Low Energy module.
This user guide provides an overview and full functional description of the audio board, including a
detailed pin list, block diagram, mechanical and electrical specifications, and ordering information.
Aimed towards developers and other technical staff, this document provides the information
necessary for evaluation and design of LE audio applications on the NORA-B1 series modules.
UBXDOC-1023859458-11406 - R01
C1-Public
www.u-blox.com

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Summary of Contents for Ublox C212-NORA-B126

  • Page 1 User guide Abstract The C212-NORA-B126 Bluetooth LE audio application board is designed for evaluation of Bluetooth LE audio and Auracast applications using the NORA-B1 series modules. Fully compliant with the Bluetooth 5.3 standard, the board hosts the NORA-B126 stand-alone Bluetooth Low Energy module.

  • Page 2: Document Information

    C212-NORA-B126 ☞ Regulatory limitations: C212-NORA-B126 is an application board. It has not been RF certified with worldwide agencies. It may not be offered for sale as an end-user product. u-blox or third parties may hold intellectual property rights in the products, names, logos, and designs included in this document.

  • Page 3: Table Of Contents

    C212-NORA-B126 - User guide Contents Document information ..........................2 Contents ................................3 Functional description ......................... 4 1.1 Overview ................................ 4 1.2 Product features ............................4 1.3 Ordering information ..........................5 1.4 Block diagram .............................. 5 Hardware ..............................6 2.1 Interfaces ..............................6 2.1.1 Switches ...............................

  • Page 4: Functional Description

    For most use cases, we recommend using two or more application boards. The application board (C212-NORA-B126) is based on the existing the nRF5340 Audio Development Kit that already provides a tool for developing your Bluetooth® Low Energy Audio products like a USB dongle for sending or receiving audio data from a computer, a business headset, a broadcast receiver to catch audio streams, true Wireless Stereo (TWS) earbuds for personal audio playback.

  • Page 5: Ordering Information

    1.4 Block diagram Figure 1 shows a block diagram of the C212-NORA-B126 LE audio board. The board includes I/O ports accessible through pin header connectors. These connectors provide the physical interface for any external device and the USB type C interface used for power supply and communication. The board also features four user-programmable LEDs, five user-programmable buttons, and a microSD card holder for additional storage.

  • Page 6: Hardware

    Several LED indicators display the status and state of specific tasks. 2.1.1 Switches C212-NORA-B126 has two switches, Power On-Off and DEBUG ENABLE On-Off. The switches are located at the bottom-side and top-side of the board respectively, as shown in Figure 2 Figure 3.

  • Page 7: Buttons

    Buttons functionality depends on the application. For more details, see the nRF5340 Audio DK User Interface description [11]. 2.1.3 Microphone C212-NORA-B126 has on-board Pulse Density Modulation (PDM) microphone at the bottom side as seen in Figure 5. The PDM microphone (U5) captures audio input.

  • Page 8: Leds

    C212-NORA-B126 - User guide 2.1.4 LEDs C212-NORA-B126 has LED indicators that are located on the top and bottom side of the board, as shown in Figure 6 Figure Figure 6: LEDs on top side Figure 7: LEDs on bottom side LED functionality depends on the application.

  • Page 9: Connector Interface

    C212-NORA-B126 - User guide 2.2 Connector interface On the top side of the C212-NORA-B126 board, several pin headers provide the physical interface for communication with external devices. The pin connections for each of the headers are shown in Figure Figure Figure 10.
  • Page 10 C212-NORA-B126 - User guide Figure 8: C212-NORA-B126 board pin headers P1 – P5 UBXDOC-1023859458-11406 - R01 Hardware Page 10 of 38 C1-Public...
  • Page 11 C212-NORA-B126 - User guide Figure 9: C212-NORA-B126 board pin headers P10 Figure 10: C212-NORA-B126 board pin headers P11, P14- P15 UBXDOC-1023859458-11406 - R01 Hardware Page 11 of 38 C1-Public...

  • Page 12: Solder Bridges

    C212-NORA-B126 - User guide 2.3 Solder bridges The C212-NORA-B126 LE audio application board has a range of solder bridges for enabling or disabling selected functionalities. Changes to these are not needed for normal use of the board. Table 4 is a complete overview of the solder bridges on the board.
  • Page 13 C212-NORA-B126 - User guide Designator Description Size Board side TP13 VDD_EXT_HW_CODEC.1V2 External HW CODEC 1.2 V supply 1.5 mm TP14 VDD_EXT_HW_CODEC.1V8 External HW CODEC 1.8 V supply 1.5 mm TP15 BAT_NTC Li-poly battery NTC pin (battery not 1.5 mm supported)
  • Page 14 C212-NORA-B126 - User guide Designator Description Size Board side TP56 PMIC_ERR nPM1100 error indication (PMIC not 1.0 mm supported) TP57 PMIC_CHG nPM1100 charge indication (PMIC not 1.0 mm supported) TP58 P0.29 RGB LED 2 Green color input pin 1.0 mm TP59 P0.30...

  • Page 15: Electrical Specifications

    VBUS USB input supply voltage Table 7: Input characteristics of voltage supply pins 3.1.4 Current consumption Table 8 shows the current consumption of C212-NORA-B126 LE audio board during a typical use (USB powered). Mode Condition Average Peak Active with FEM enabled 82.5 mA...

  • Page 16: Software

    On the RF5340 Audio DK, the LED is located on the underside of the board and illuminates the NXP logo. The same LED on the C212-NORA-B126 board is placed in the center of the top side of the C212-NORA-B126. Moreover, C212-NORA-B126 uses the u-blox NORA- B126 module, which includes the nRF5340 chip and a front-end module PA/LNA (FEM) for better range and coverage.
  • Page 17 C212-NORA-B126 - User guide Replace the configuration of file with: nrf21540ek\nrf21540ek_fwd.overlay &gpio_fwd { nrf21540-gpio-if { gpios = <&gpio1 8 0>, <&gpio1 9 0>, <&arduino_header 15 0>, /* pdn-gpios */ <&arduino_header 10 0>, /* ant-sel-gpios */ <&arduino_header 8 0>; /* mode-gpios */ nrf21540-spi-if { gpios = <&arduino_header 16 0>,...

  • Page 18: Mechanical Specification

    C212-NORA-B126 - User guide Mechanical specification 5.1 Physical dimensions Figure 11: Physical dimensions of the C212-NORA-B126 LE Audio board UBXDOC-1023859458-11406 - R01 Mechanical specification Page 18 of 38 C1-Public...

  • Page 19: Limitations

    C212-NORA-B126 - User guide Limitations ☞ Regulatory limitations: C212-NORA-B126 is an application board. It has not been RF certified with worldwide agencies. It may not be offered for sale as an end-user product. 6.1 Hardware The current hardware revision can only accommodate a single microSD card with a storage capacity of up to 16 GB.

  • Page 20: Schematics

    C212-NORA-B126 - User guide Schematics Figure 12: Top-level schematic (1 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 20 of 38 C1-Public...
  • Page 21 C212-NORA-B126 - User guide Figure 13: Interface schematic (2 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 21 of 38 C1-Public...
  • Page 22 C212-NORA-B126 - User guide Figure 14: Connectors schematic (3 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 22 of 38 C1-Public...
  • Page 23 C212-NORA-B126 - User guide Figure 15: User interface schematic (4 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 23 of 38 C1-Public...
  • Page 24 C212-NORA-B126 - User guide Figure 16: Reference circuitry schematic (5 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 24 of 38 C1-Public...
  • Page 25 C212-NORA-B126 - User guide Figure 17: Hardware codex schematic (6 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 25 of 38 C1-Public...
  • Page 26 C212-NORA-B126 - User guide Figure 18: PMIC schematic (7 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 26 of 38 C1-Public...
  • Page 27 C212-NORA-B126 - User guide Figure 19: Supportive circuitry schematic (9 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 27 of 38 C1-Public...
  • Page 28 C212-NORA-B126 - User guide Figure 20: FTDI schematic (10 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 28 of 38 C1-Public...
  • Page 29 C212-NORA-B126 - User guide External Figure 21: Hardware codec select (11 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 29 of 38 C1-Public...
  • Page 30 C212-NORA-B126 - User guide Figure 22: Power switch (12 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 30 of 38 C1-Public...
  • Page 31 C212-NORA-B126 - User guide Figure 23: Hardware codec SPI debug (13 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 31 of 38 C1-Public...
  • Page 32 C212-NORA-B126 - User guide Figure 24: MCU interface schematic (14 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 32 of 38 C1-Public...
  • Page 33 C212-NORA-B126 - User guide Figure 25: Power management schematic (15 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 33 of 38 C1-Public...
  • Page 34 C212-NORA-B126 - User guide Figure 26: Current monitor (16 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 34 of 38 C1-Public...
  • Page 35 C212-NORA-B126 - User guide Figure 27: Switch (17 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 35 of 38 C1-Public...
  • Page 36 C212-NORA-B126 - User guide Figure 28: USB Hub (18 of 19) UBXDOC-1023859458-11406 - R01 Schematics Page 36 of 38 C1-Public...

  • Page 37: Appendix

    C212-NORA-B126 - User guide Appendix A Glossary Abbreviation Definition Inter-IC-Sound Integrated Circuit Pulse Density Modulation microSD card micro Secure Digital card Serial Peripheral Interface UART Universal Asynchronous Receiver-Transmitter Universal Serial Bus Input /Output Voltage Table 10: Explanation of the abbreviations and terms used...

  • Page 38: Related Documentation

    C212-NORA-B126 - User guide Related documentation NORA-B1 series data sheet, UBX-20027119 NORA-B1 system integration manual, UBX-20027617 nRF Connect SDK installation guide Nordic Semiconductor nRF5340 Audio DK application guide Nordic Semiconductor nRF Connect SDK, Adding support for front-end modules using Simple...

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