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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

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
  • System requirements
  • Latest news

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
Jun.26
J-Link
J-Link and Flasher devices next to GigaDevice GD32C2  microcontroller

SEGGER provides debug and flash-programming support for GigaDevice's GD32C2 series

With the release of the V8.46 version of the J-Link and Flasher Software and Documentation Packs, SEGGER has added debug and flash-programming support for GigaDevice's general purpose ARM® Cortex®-M23-based GD32C2 range of microcontrollers.

[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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