Skip to main content
  • Products
  • Evaluate our Software
  • Downloads
  • Free Utilities
  • Purchase
  • Silicon Vendors
  • Support
  • About Us
  • Blog
  • Forum
  • Search
  • Jobs
  • Newsletter
  • Blog
  • Contact
  • Shop
  • J-Link debug probes
  • J-Link OB Spansion

    J-Link OB-Spansion

    SEGGER offers a firmware running on the Spansion eval boards, which provide a on-board debug solution on Spansion MB9AF312K basis.

    J-Link-OB-Spansion
    1. 1.Getting Started
    2. 2.Terms of Use
    3. 3.Firmware Limitations
    4. 4.Limitations

    Overview

    This firmware makes the debug solution on these boards behaving compatible to J-Link LITE, allowing users to take advantage of most J-Link features like the ultra fast flash download and debugging speed or the free-to-use GDBServer, by using a low-cost Spansion eval board platform.

    Key features

    • Supports ARM Cortex-M based Spansion boards which come with a on-board debug solution
    • Implements JTAG and SWD debug protocol and virtual COM port functionality

    Getting Started

    In order to get started with the Spansion on-board debug solution just a few steps are necessary. Note that these steps are only necessary to performed once to initially get the J-Link firmware into the Spansion on-board debug solution. Further firmware updates are performed as with any other J-Link, via the J-Link DLL.

    • Download and install the Spansion USBDirect flash programming utility

    • Make sure that the Spansion eval board is configured to be powered via the USB connector of the on-board debug solution. Configuration may differ for various eval boards. In case a board is not listed here, please refer to the appropriate "firmware update" guide from Spansion, for this board.
      SK-FMx-xxxPMC-TFT: No special setup required
      SK-FM4-U120-9B560: Close J15 to enable power via 3.3V. Also close J7
      SK-FM3-176PMC-ETHERNET V2.0: Close J5
      SK-FM0-V48-S6E1A1: Close J4 to enable power via 3.3V. Also close J1
      BULB-BOARD-MINI: No special setup required
      SK-FM4-216-ETHERNET: Close JP62, JP76, JP77
      SK-FM4-176L-S6E2CC: Set J4 to 1-2

    • Make sure that the board is configured to boot up in firmware update mode. Configuration may differ for various eval boards. In case a board is not listed here, please refer to the appropriate "firmware update" guide from Spansion, for this board.
      SK-FMx-xxxPMC-TFT: Close JP30
      SK-FM4-U120-9B560: Close J5
      SK-FM3-176PMC-ETHERNET V2.0: Close JP47
      SK-FM0-V48-S6E1A1: Close J8
      BULB-BOARD-MINI: Close J2
      SK-FM4-216-ETHERNET: Close JP18
      SK-FM4-176L-S6E2CC: Close JP1

    • Plug-in the eval board via the USB connector that connects the on-board debug solution. It will show up as a virtual COM port at the PC.

    jlink-ob-spansion_USBDirect_VCOMList
    • Start the USBDirect flash programming utility and select MB9AF312K as target device Select the J-Link-OB-MB9AF312K-Spansion_150917.srec as image to be programmed Select the appropriate COM port Hit the "Full operation" button
    jlink-ob-spansion_USBDirect_Setup
    • If any jumpers have been set to boot the board in firmware update mode, remove these jumpers
    • Power-cycle the board. It will now boot up as a J-Link.
    • Make sure that the latest J-Link software package is installed: J-Link software package download

    Terms of Use

    jlink-ob-spansion_lic_dialog

    SEGGER created a firmware which runs on the Spansion on-board debug solution, making it J-Link compatible. In order to make use of this firmware, the following Terms Of Use must be accepted:

    • The firmware is only to be used with Spansion target devices. Using it with other devices is prohibited and illegal.

    • The firmware is for use with evaluation boards only. It is not for use with custom hardware.

    • The firmware may only be used for development and/or evaluation purposes. It may not be used for production purposes.

    • The firmware is made available without any warranty and without support.


    If there is any doubt if a certain use may be considered within the foregoing scope it is strongly recommended to consult SEGGER prior to use.
    When starting a debug session, the following license dialog shows up which must be accepted in order to be able to work with the J-Link firmware for the Spansion on-board debug solution:

    Firmware Limitations

    Limitations

    The firmware that makes the Spansion on-board debug solution J-Link compatible has some limitations in contrast to an original, industry leading SEGGER J-Link:

    • May be used with ARM Cortex-M based Spansion devices only.
    • Only debugging on evaluation boards is allowed. Debugging on custom hardware is not supported and not allowed.
    • No production flash programming support.
    • Unlimited breakpoints in flash available for evaluation only.
    • Due to limitations of the Spansion eval board PCBs, SWO cannot be supported by the on-board debug solution. In order to use SWO, an external J-Link connecting to the target CPU, is required.
    • No support is given.

    By using an original SEGGER J-Link Pro, J-Link ULTRA+ or J-Link PLUS, all these limitations will be gone. Learn more about J-Link.

    • User manual
    • Online documentation
    • List of downloads
    • Release notes
    • Update notification
    • Pricing
    • Support
    • Silicon vendor resources
    • J-Link Prime

    Headquarters

    SEGGER Microcontroller GmbH

    Ecolab-Allee 5
    40789 Monheim am Rhein, Germany
    info@segger.com
    Tel.: +49-2173-99312-0
    Fax: +49-2173-99312-28

    Locations

    USA: SEGGER Microcontroller Systems LLC

    Boston area
    101 Suffolk Lane
    Gardner, MA 01440, USA
    us-east@segger.com
    Tel.: +1-978-874-0299
    Fax: +1-978-874-0599

    Silicon Valley
    Milpitas, CA 95035, USA
    us-west@segger.com
    Tel.: +1-408-767-4068

    China: SEGGER Microcontroller China Co., Ltd.

    Room 218, Block A, Dahongqiaoguoji
    No. 133 Xiulian Road
    Minhang District, Shanghai 201199, China
    china@segger.com
    Tel.: +86-133-619-907-60

    ISO 9001 certified

    ISO 9001

    30+ years of experience

    First-class embedded software tools since 1992
    • Imprint
    • Disclaimer
    • Code of Conduct
    • Privacy Policy
    © 2025 SEGGER - All rights reserved.