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Jesus Zykov
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Jmicron Firmware Update Tool: A Step-by-Step Tutorial for Bridge Controllers

Jmicron Firmware Update Tool: What It Is and How to Use It

If you have a device that uses a Jmicron controller, such as a USB to SATA bridge or a PCIe to SATA bridge, you might want to update its firmware to improve its performance and compatibility. But how do you do that? In this article, we will explain what Jmicron is, what firmware is, why you need to update it, and how to use the Jmicron firmware update tool.

jmicron firmware update tool


Jmicron is a company that specializes in storage solutions, such as bridge controllers, port multipliers, smart sensors, and radar gesture recognition. They provide various products that enable data transfer between different interfaces, such as USB, PCIe, SATA, UFS, and UHS.

What is firmware?

Firmware is a type of software that controls the hardware of a device. It is usually stored in a flash memory or a ROM chip inside the device. Firmware provides the basic functions and instructions for the device to operate properly.

Why do you need to update firmware?

Updating firmware can bring several benefits to your device, such as:

  • Fixing bugs and errors

  • Enhancing performance and stability

  • Adding new features and functions

  • Improving compatibility with other devices and systems

However, updating firmware also involves some risks, such as:

  • Bricking your device if the update fails or is interrupted

  • Voiding your warranty if the update is not authorized by the manufacturer

  • Losing your data if you don't back it up before updating

Therefore, you should only update firmware when it is necessary and when you are confident that you can do it safely.

How to download Jmicron firmware update tool

To update your Jmicron controller's firmware, you will need two things: the Jmicron firmware update tool and the firmware file for your specific controller model. Here's how to get them:

Visit the official website

The first step is to go to, which is the official website of Jmicron where you can find all their products and downloads. You can browse by category or use the search function to find your controller model.

Choose the right controller model

The next step is to choose the right controller model for your device. For example, if you have a USB 3.1 Gen 2 to PCIe Gen 3x2 bridge controller, you should look for JMS583. If you have a USB 3.0 to dual SATA 6Gbps bridge controller, you should look for JMS561. Make sure you select the correct model that matches your device's specifications.

Download the tool and the firmware file

The last step is to download both the tool and the firmware file for your controller model. The tool is usually named FwUpdateTool_vX_X_X_X.exe, where X represents the version number. The firmware file is usually named XXXX.bin or XXXX.hex, where XXXX represents the model number. Save them in a folder on your computer where you can easily access them later.

How to use Jmicron firmware update tool

Now that you have downloaded both the tool and the firmware file, you are ready to use them to update your controller's firmware. Here are the steps:

Connect your device to the computer

The first step is to connect your device that uses the Jmicron controller to your computer via USB or PCIe. Make sure it is recognized by your computer and that it has power supply.

Run the tool as administrator

The next step is to run the tool as administrator on your computer. To do this, right-click on FwUpdateTool_vX_X_X_X.exe and select "Run as administrator". A window will pop up asking for permission. Click "Yes" to proceed.

Select the device and the firmware file

The third step is to select your device and the firmware file in the tool's interface. You will see a list of devices that are connected to your computer. Choose the one that corresponds to your Jmicron controller. Then, click on "Browse" and locate the firmware file that you downloaded earlier. Click on "Open" to select it.

Click on update and wait for completion

The last step is to click on "Update" and wait for the process to complete. Do not disconnect your device or turn off your computer during this time. You will see a progress bar showing how much time is left until completion. When it reaches 100%, you will see a message saying "Update OK". Click on "OK" and close the tool.


In this article, we have explained what Jmicron is, what firmware is, why you need to update it, and how to use the Jmicron firmware update tool. We hope this guide has been helpful for you and that you have successfully updated your controller's firmware. If you have any questions or issues, please contact Jmicron's customer support or visit their website for more information.

Summary of main points:

  • Jmicron is a company that provides storage solutions such as bridge controllers.

  • Firmware is a type of software that controls hardware of a device.

  • Updating firmware can improve performance and compatibility of a device but also involves some risks.

  • To update Jmicron controller's firmware, you need both FwUpdateTool_vX_X_X_X.exe (the tool) and XXXX.bin or XXXX.hex (the firmware file) for your specific model.

  • To use FwUpdateTool_vX_X_X_X.exe (the tool), connect your device via USB or PCIe; run it as administrator; select device & firmware file; click on Update & wait for completion.

Call To Action:

If you found this article useful, please share it with others who might benefit from it. Also, feel free to leave us a comment below with your feedback or suggestions for future topics.

**FAQs** Q: How do I know which Jmicron controller model I have? A: You can check your device's specifications or look at its label or sticker for its model number. Q: Where can I find more information about Jmicron products? A: You can visit their official website at, where you can find their product catalogues, datasheets, manuals, drivers, etc. Q: What should I do if I encounter an error while updating? A: You should try restarting your computer and repeating the process again. If that doesn't work, contact Jmicron's customer support or visit their website for troubleshooting tips. Q: How often should I update my controller's firmware? A: There is no fixed rule for how often you should update your controller's firmware. It depends on whether there are new updates available and whether they are relevant for your device's performance and compatibility. Q: Can I use FwUpdateTool_vX_X_X_X.exe (the tool) for other devices? A: No, FwUpdateTool_vX_X_X_X.exe (the tool) only works for devices that use Jmicron controllers.


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