SEGGER Flasher Compact

The space-efficient programmer

Flasher Compact is the compact twin to the Flasher PRO, primarily designed for installation into production rigs or automated test equipment (ATE) where production space is limited.

Flasher Compact is an in-circuit flash programming tool, designed to program the internal and external memory of an MCU or SOC as well as program a (Q)SPI memory chip to which it is directly connected. Users control it in stand alone mode without the need of a PC program. Thanks to its compact nature and the mounting holes, integration into size-limited production setups is easier. Powered by USB, this stand-alone flash programmer has 128 MB of internal memory for storing firmware images and programming configurations. The built-in web server can be used to configure or setup the Flasher.

Flasher comes with the setup and control software for Windows, Linux and macOS.  Software and firmware updates are included. Similarly, all supported devices can be used without additional cost. Support for devices added in the future is also included.

Supported devices

SEGGER Flashers support a wide range of CPU cores and an even wider range of different devices, such as SPI-Flash devices.

This includes support for tens of thousands of devices in hundreds of device families with billions of devices programmed.

Universal target support

The Flasher Compact can program the internal and external memory of an MCU or SOC as well as program a (Q)SPI memory chip to which it is directly connected. It supports a variety of interfaces, so it can “speak” to almost any target. It can operate in either stand-alone or  PC-based programming mode.


All software is included free of charge. It comes with the flash loaders for all supported devices.


Future software and firmware updates as well as any new flash loaders for target devices that will be added, are also free of charge.

  • No licensing costs, even for newly supported devices.
  • No hidden costs.
  • No future costs.


As a cross-platform solution, Flasher Compact comes with the setup and control software for Linux, macOS and Windows. Software and firmware updates are included. Similarly, use on all currently supported target devices, and any that will be added, is also included.

Parallel programming

The Flasher Compact and the modular in-system programmer Flasher ATE are capable of programming multiple devices in parallel, whether these devices are equal or part of a multi-device system. Using the Flasher Hub, multiple Flasher Compacts can gang-up to program up to 24 targets at once. The Flasher Compact's ultra-fast programming speed makes it ideally suited for high-volume mass production.

Serial number assignment

Many modern devices require some pieces of unique information. Flasher Compact allows the programming of data that differs amongst other otherwise identical units. Typical examples are things like serial numbers, ethernet hardware addresses (MAC), and digital signatures, and license keys that enable/disable product features. All these options can be adapted from device to device by applying patch data to the original firmware.

Use cases

Flashing & coding in high-volume mass production

Like many within SEGGER’s Flasher family, the Flasher Compact is capable of programming multiple devices at once. These devices can be equal, or part of a multi-device system. Moreover, several Flasher Compact devices can be stacked on top of each other. That way, more than one microcontroller can be programmed at once.

With SEGGER’s Flasher Hub up to 24 Flasher Compacts can be connected and controlled simultaneously, to create a single, powerful gang programmer for efficient high-speed parallel programming.

  • Increased programming capacity
  • High throughput
  • Parallel programming enabled via Flasher Hub

Programming in size-limited production setups

The Flasher Compact can be placed very close to the device being programmed. It can even be attached directly to the programming fixture, reducing the need for additional space. Processes for serial in-target programming can thus be transferred directly to assembly areas.

  • Reduced cable lengths for higher programming speed
  • Fits into space-constraint setups such as ATEs


Power supplyUSB powered, maximum 130mA (idle)
USB host interfaceUSB 2.0 (Hi-Speed); Micro USB
Target interface20-pin (14-pin adapter available)
Supported target interfacesSPI, QSPI, 8051 C2, cJTAG, FINE, ICSP, IIC, ISP, JTAG, PDI, SPD, SWD, SWIM, UART, UPDI
Max. target cable lengthRecommended (delivered): 20cm (8")
Max. 2m (6.5") allowed but might reduce max. target interface speed
Serial transfer rate between Flasher Compact and target

Depending on target interface; JTAG/SWD: 50MHz

Supported target voltage1.2 - 5V
Current drawn from target voltage sense pin (VTRef)< 25µA
Target supply voltage5V
Target supply currentMax. 400mA
Operating temperature+ 5 °C ... + 60 °C
Storage temperature- 20 °C ... + 65 °C
Relative humidity (non-condensing)< 90% rH
Size (without cables)70mm x 45mm x 18mm
Weight (without cables)40g
Supported OSMicrosoft Windows (x86/x64), Linux (x86/x64/Arm), macOS (x86/Apple M1)
  • Compact universal stand-alone programmer
  • Holes for mounting make target side assembly easy
  • Includes the Flasher software package
  • Includes the license to program all supported devices
  • No additional licenses required. No hidden costs. No future costs.
  • Future proof: Software, firmware updates, and new flash loaders, are free of charge


video Segger


SEGGER video QSPI flash programming

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