SEGGER Flasher Portable PLUS

Flasher Portable PLUS—The Mobile Flash Programmer

The handheld stand-alone Flash Programmer for on-chip and external flash memory. Flasher Portable PLUS is a battery driven programming tool for microcontrollers with on-chip and/or external flash memory. It has been designed to fill the need of an extremely portable, production grade flash programmer used for in-field firmware updates. Flasher Portable PLUS can be powered by its internal rechargeable battery or USB. Use the integrated 1,8 inch display to review your firmware and programming status.

Initial setup/preparation for stand-alone mode operation is done via the J-Flash software, also used by other Flasher models, which requires a PC running Microsoft Windows 2000, Windows XP, Windows 2003, Windows Vista, Windows 7, Windows 8 or Windows 10.

Flasher Portable PLUS also supports having up to eight configurations/image files stored on the Flasher, so one unit can be used for different targets, versions or configurations. Proper image selection is done by simply clicking a button. The currently selected image is displayed.

Isolators to optically isolate the Flasher Portable PLUS from Power Supply or the target and adapters for all common connectors are available for the Flasher Portable PLUS.


In order to set up Flasher Portable PLUS for stand-alone operation, you need the J-Flash software from the J-Link software and documentation package. 
Download J-Link Software and Documentation Package


Flasher can be used for programming flash targets with the J-Flash software or stand-alone.

In order to use Flasher for the first time you need to install the Flasher related software and documentation pack which, among others, includes the J-Flash software and connect Flasher to the host PC via USB.


In general, Flasher should be powered on before connecting it with the target device. That means you should first connect Flasher with the host system via USB / RS232 and then connect Flasher with the target device via JTAG. Power-on the device after you connected Flasher to it. If you use Flasher in stand-alone mode, just power-on Flasher via external power supply.


If the USB driver is working properly and your Flasher is connected with the host system, you may connect Flasher to your target hardware. Then start the J-Link command line tool JLink.exe, which should now display the normal Flasher related information and in addition to that it should report that it found a JTAG target and the target’s core ID. The screenshot below shows the output of JLink.exe. As can be seen, it reports a Flasher with 3 JTAG devices connected. 

Verifying target device connection with J-Link Commander


Another way to verify the target connection is to connect to the target using J-Flash. To connect to the target with J-Flash you have to choose an appropriate project file for the target first. After opening the project file choose Target --> Connect from the menu to connect to the target. If everything works as expected, follow the instructions in 2.2 to download a program to Flasher with J-Flash.


J-Flash is a software running on Windows (Windows 2000 or later) systems and enables you to program your flash EEPROM devices via the JTAG connector on your target system. 
J-Flash works with any device/core that is supported by J-Link and supports all common external flashes, as well as the programming of internal flash of ARM microcontrollers. It allows you to erase, fill, program, blank check, upload flash content, and view memory functions of the software with your flash devices.

Using Flasher with PC Software "J-Flash"


In order to setting up Flasher for the "stand-alone mode" it has to be in "J-Link mode". When the correct connection of Flasher to the host PC is verified start the J-Flash software. For more information about the general setup sequence to prepare Flasher for stand-alone mode, please refer to the Flasher User's Guide (UM08022).


Flasher Portable PLUS supports a wide range of CPU cores and an even wider range of different devices from various vendors. On this page, an overview of all supported CPU cores as well as devices for which flash programming is supported is given.


Any microcontroller, MPU, SoC with a supported CPU core with its debug interface accessible is supported and can be controlled by Flasher Portable.
The following CPU cores are supported by Flasher Portable PLUS:

  • ARM720T
  • ARM920T
  • ARM922T
  • ARM926EJ-S
  • ARM946E-S
  • ARM966E-S
  • ARM1136JF-S
  • ARM1136J-S
  • ARM1156T2-S
  • ARM1156T2F-S
  • ARM1176JZ-S
  • ARM1176JZF
  • ARM1176JZF-S
  • Cortex-A51
  • Cortex-A71
  • Cortex-A81
  • Cortex-A91
  • Cortex-A121
  • Cortex-A151
  • Cortex-A171
  • Cortex-M0
  • Cortex-M0+
  • Cortex-M1
  • Cortex-M3
  • Cortex-M4
  • Cortex-M7
  • Cortex-M23
  • Cortex-M33
  • Cortex-R41
  • Cortex-R51
  • Renesas RX610
  • Renesas RX621
  • Renesas RX62G
  • Renesas RX62N
  • Renesas RX62T
  • Renesas RX6301
  • Renesas RX6311
  • Renesas RX63N1
  • Renesas RX63T1
  • e200z0 (PowerPC)

No Flasher stand-alone support yet. Currently, flash programming is available via PC based J-Flash software only.


The following list gives an overview about which devices are known by Flasher Portable PLUS and are available for flash programming. In case of doubt, please feel free to get in touch with

The full list of supported devices is always valid for the latest version (highest version number) of the J-Link / Flasher software package. This may be a release (even version number) or beta version (odd version number), since support for some devices is usually added in a beta phase first.

 Full list of Supported Devices


Besides programming the flash memory via the debug interface (JTAG), there are some devices which are programmed via a device-specific programming interface. These interfaces can be supported by the Universal Flash Loader, a feature for the Flasher PRO and the Flasher Portable PLUS.

The Universal Flash Loader supports the serial programming interface of the Renesas RL78 device family, based on a 16 bit microcontroller including over 1000 devices.


The Universal Flash Loader Configurator is a software utility to prepare the Flasher for programming. It includes a device database and a comfortable user interface for configuration.

The configuration and data files can be directly downloaded via USB to a connected Flasher PRO or Flasher Portable PLUS. The utility is able to save the configuration settings into a project file for later use, so the image file can easily be upgraded.

The Universal Flash Loader Configurator is available for download here.

Universal Flash Loader Configurator


Besides using the Universal Flash Loader Configurator, it is also possible to manually create or edit a configuration. This might be of interest for very new devices which are not yet known to the configuration utility. The configuration files for the Universal Flash Loader are in the human readable ini file format. For a detailed description of the individual properties please refer to the Flasher User's Guide (UM08022).


There are special adapters to use with the Universal Flash Loader.

RL78 evaluation boards typically come with a 14-pin connector. SEGGER offers an adapter to connect the Flasher to these evaluation boards.

Target Connection

Example: Flasher RL78 adapter connected to Flasher PRO. The adapter can be used with Flasher Portable PLUS as well.


The following list gives an overview about which devices are available for flash programming using the Universal Flash Loader. In case of doubt, please feel free to get in touch with
The list below is always valid for the latest version (highest version number) of the J-Link/Flasher software package. This may be a release (even version number) or beta version (odd version number), since support for some devices is usually added in a beta phase first.

 List of known devices

Flasher Portable PLUS Specifications
Flasher Portable PLUS SpecificationsPower Supply

Via internal lithium-ion rechargeable battery (Sony US14500VR) or USB

Flasher Portable PLUS SpecificationsCharging via USBFlasher Portable PLUS Specifications70 minutes (at 1A charging current)
Flasher Portable PLUS SpecificationsUSB Host InterfaceFlasher Portable PLUS SpecificationsUSB 2.0
Flasher Portable PLUS SpecificationsTarget InterfaceFlasher Portable PLUS Specifications Standard 20-pin J-Link target connector (optional adapters available)
Flasher Portable PLUS SpecificationsMax. target cable lengthFlasher Portable PLUS SpecificationsRecommended (delivered): 20cm (8")
Max. 2m (6.5") allowed but might reduce max. target interface speed.
Flasher Portable PLUS SpecificationsSerial Transfer Rate between Flasher Portable and TargetFlasher Portable PLUS SpecificationsUp to 15MHz
Flasher Portable PLUS SpecificationsSupported Target VoltageFlasher Portable PLUS Specifications 1.2 - 5V
Flasher Portable PLUS SpecificationsCurrent drawn from target voltage sense pin (VTRef)Flasher Portable PLUS Specifications< 25µA
Flasher Portable PLUS SpecificationsTarget supply voltageFlasher Portable PLUS Specifications

4.5V max. (depends on current battery voltage)

Flasher Portable PLUS SpecificationsTarget supply currentFlasher Portable PLUS SpecificationsMax. 400mA
Flasher Portable PLUS SpecificationsOperating TemperatureFlasher Portable PLUS Specifications

+ 5 °C ... + 60 °C (Normal operation)

+ 5 °C ... + 45 °C (Battery charging)

Flasher Portable PLUS SpecificationsStorage TemperatureFlasher Portable PLUS Specifications- 20 °C ... + 45 °C
Flasher Portable PLUS SpecificationsRelative Humidity (non-condensing)Flasher Portable PLUS Specifications< 90% rH
Flasher Portable PLUS SpecificationsSize (without cables)Flasher Portable PLUS Specifications126mm x 70mm x 28mm
Flasher Portable PLUS SpecificationsWeight (without cables)Flasher Portable PLUS Specifications140g
Flasher Portable PLUS SpecificationsSupported OSFlasher Portable PLUS SpecificationsMicrosoft Windows 2000
Microsoft Windows XP
Microsoft Windows XP x64
Microsoft Windows 2003
Microsoft Windows 2003 x64
Microsoft Windows Vista
Microsoft Windows Vista x64
Microsoft Windows 7
Microsoft Windows 7 x64
Microsoft Windows 8
Microsoft Windows 8 x64
Microsoft Windows 10
Microsoft Windows 10 x64
  • Stand-alone in-circuit-programmer (Once set up, Flasher can be controlled without the use of a PC program)
  • Powered by internal battery rechargeable Li-Ion 680mAh, no external power supply required
  • Full insights with the new 1,8 inch display
  • Up to 10 hours programming with one battery charge
  • Supports having up to eight configurations/data files being stored on Flasher
  • Push button allows easy selection between multiple images/configurations stored on Flasher
  • 128 MB internal memory for configuration and data file storage
  • Supports ARM, Cortex, PowerPC and Renesas RX cores.
  • Supports internal and external flash devices
  • Free updates
  • Data files can be updated via mass storage or via J-Flash
  • Target interface: JTAG / SWD / FINE / SPD
  • Programming speed typically between 30 KB/second and 1 MByte/second. Max. programming speed highly depends on target hardware and max. programming speed of the flash itself
  • SECURITY: Flasher Portable and Flasher Portable PLUS support Authorized Flashing. It allows to limit the number of flash programming cycles and to protect the Flasher against non-authorized access in case of external production
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