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Nordic Semiconductor nRF24LU1 User Manual

Compact usb dongle for wireless peripherals
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nRF24LU1 Reference Design
"Compact USB Dongle for wireless peripherals"
User Guide v1.0
All rights reserved.
Reproduction in whole or in parts is prohibited without the prior written permission of the copyright holder.
September 2007

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Summary of Contents for Nordic Semiconductor nRF24LU1

  • Page 1 Reference Design “Compact USB Dongle for wireless peripherals” User Guide v1.0 All rights reserved. Reproduction in whole or in parts is prohibited without the prior written permission of the copyright holder. September 2007...
  • Page 2 Reference Design User Guide Liability disclaimer Nordic Semiconductor ASA reserves the right to make changes without further notice to the product to improve reliability, function or design. Nordic Semiconductor ASA does not assume any liability arising out of the application or use of any product or circuits described herein. All application information is advisory and does not form part of the specification.

  • Page 3: Table Of Contents

    Reference Design User Guide Content Introduction ..................... 4 Content of the nRF24LU1 Reference Design ........5 Hardware ..................5 Software.................... 6 Documentation.................. 6 Accessories..................6 How to use the reference design ............7 nRF24LU1 USB Dongle Schematics ............8 Power supply ..................

  • Page 4: Introduction

    EMC tested. RF qualification test reports and USB compliance report are included on the The nRF24LU1 will typically be used in a USB dongle for mouse, keyboard, remote control, data collection and transfer, communication with peripheral units etc.

  • Page 5: Content Of The Nrf24Lu1 Reference Design

    Reference Design User Guide 2 Content of the nRF24LU1 Reference Design This chapter describes the content of the nRF24LU1 Reference Design. In addition to the nRF24LU1 USB dongle, the reference design kit contains tools for programming the flash of the nRF24LU1.

  • Page 6: Software

    2.2 Software All software is supplied on the packaged CD. • nRF24LU1 Configuration and Evaluation Suite (CES), v1.0, build 1926. Installed by running “nRF24LU1_DK_v1.0_setup.exe.” The program file is named “LU1Config.exe.” • nRF24LU1 Flash Programmer application, v1.2, build 1891. Installed by running “nRF24LU1_SDK_v1.2_setup.exe.”...

  • Page 7: How To Use The Reference Design

    The USB dongle can be used as a development platform as it is. To start using the reference design, the first step is normally to develop the firmware. The nRF24LU1 Software Development Kit, SDK, is a good starting point. It has libraries and code examples that can be used as a base for your own code.

  • Page 8: Nrf24Lu1 Usb Dongle Schematics

    The antenna is a quarter wave meander type on PCB. The antenna impedance is matched to the 50ohm output in the matching network with the use of L4 and C13. When the nRF24LU1 USB Dongle is connected to a PC, the PC will add a significant ground plane to the nRF24LU1 USB Dongle. This Revision 1.0...
  • Page 9 Reference Design User Guide means than any antenna measurements must be done with the dongle connected to the PC. Of course not all PC’s are equal, so there will be compromises. The antenna in this design is tuned for this layout only.

  • Page 10: Nrf24Lu1 Usb Dongle Pcb Specification

    Figure 4 shows the stack up of the board. The nRF24LU1 is mounted on layer 1. To keep the distance between the RF components to ground as large as possible, layer 3 is used an inner ground plane.

  • Page 11: Flash Programming

    Since the connector, J2, on the nRF24LU1 USB Dongle only have 5 pins, there is no direct access to the VDD of the nRF24LU1. The 5v VBUS is regulated down to 3.0v on the Programming Adapter and will give the level shifters on the ISP dongle the same voltage as on the nRF24LU1 USB Dongle.
  • Page 12 Reference Design User Guide The nRF24LU1 Flash Programmer program must then be installed on the PC. When the program is started, the following screen will appear: Figure 7 - nRF24LU1 Flash Programmer When the ISP Dongle is connected to the USB port, the text “USB Dongle not connected” will change to “USB Dongle connected”...

  • Page 13: Configuration And Evaluation Suite

    7 Configuration and evaluation suite The nRF24LU1 USB dongle is configured with the configuration and evaluation suite (CES.) The use of this is described in detail in the nRF24LU1 Development Kit User Guide available on the CD. Revision 1.0 Page 13 of 15...

  • Page 14: Appendix 1: Pcb Layout

    Reference Design User Guide APPENDIX 1: PCB layout Bottom Silkscreen Top silkscreen Inner layer 1 Top signal layer Inner layer 2 Bottom signal layer Figure 8 - nRF24LU1 USB Dongle layout Revision 1.0 Page 14 of 15...

  • Page 15: Appendix 2: Bill Of Material

    Chip Inductor +/-5%, Murata LQP15-series 0402 0402 R3, R4 0402 R6, R8 0402 0402 nRF24LU1 QFN32L/5x5 Nordic Semiconductor Epson Toyocom FA-20H 16MHz, CL=12pF, 16MHz XTAL 2520 +/-20ppm 0004KJO Table 1 - nRF24LU1 USB Dongle Bill of Material. Revision 1.0 Page 15 of 15...

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