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  • J-Link debug probes
  • J-Mem

    J-Mem
    Display memory contents of microcontrollers

    J-Mem is a GUI application that displays memory contents of microcontrollers and allows modifications of RAM as well as special function registers while the target is running.

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    SEGGER Debug & Trace Probes
    1. 1.Licensing
    2. 2.System requirements
    3. 3.Latest news

    Overview

    J-Mem is a small stand-alone application available for Windows, macOS and Linux. J-Mem makes it possible to look into the memory of a chip at run-time using J-Link or J-Trace.

    The memory accesses can be selected to be 8, 16 or 32 bit. J-Mem works nicely when modifying SFRs, especially because it writes the SFR only after the complete value has been entered.

    JMem

    Key features

    • RAM can be modified
    • Special Function Registers (SFRs) can be written
    • Whole regions in RAM can be filled with a desired value
    • Memory sections can be saved to a .bin file
    • A periodic refresh of the displayed memory contents can be set

    Licensing

    J-Mem comes as part of the J-Link Software and Documentation Package. The software package is free for any J-Link or J-Trace device and can be downloaded here:

    DownloadJ-Link Software and Documentation Pack

    System requirements

    Supported OS
    WindowsMicrosoft Windows (x86/x64)
    macOSmacOS (x86/Apple Silicon)
    LinuxLinux (x86/x64/Arm)

    Latest news

    2025
    Jul.09
    J-Link
    J-Link devices alongside Renesas RA8P1

    SEGGER delivers J-Link and Flasher support for Renesas Electronics's RA8P1

    SEGGER's J-Link series of debug probes and Flasher programmers are now compatible with Renesas Electronics's high-performance group of RA8P1 microcontrollers (MCUs). The MCUs are powered by the Arm® Cortex®-M85 (CM85) processor with a Helium™ M-Profile Vector Extension and Ethos™-U55 neural processing unit.

    [Read more...]

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    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

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