Turn off your device. Hold down any physical button (usually Volume Up or Home) and connect the USB cable to the PC while rapidly tapping the Power button 10 times. Look at the Device Manager. You should see or "Allwinner FEL Device" listed without any yellow error triangles. Verifying ADB Mode:
Open on your PC (Right-click Start > Device Manager).
Follow the on-screen prompts. Windows may display a red warning box saying "Windows can't verify the publisher of this driver software." Click Once finished, restart your computer. Method 2: Manual Installation via Windows Device Manager
The is a small but mission-critical software bridge that enables low-level access to one of the most versatile industrial ARM processors available today. While Windows presents the most challenges due to driver signature enforcement and legacy INF handling, a methodical approach—disabling signature checks, using the correct VID/PID combination, and manually installing via Device Manager—will almost always succeed.
Getting a host PC to speak reliably with an A133 device over USB is rarely plug-and-play. Understanding why requires a look at the chip’s multiple USB personalities, the legacy of Allwinner’s boot ROM, and the specific quirks of the A133.
Right-click > > Browse my computer for drivers .
Most Allwinner drivers are packaged as "Allwinner USB Drivers" or included within the PhoenixSuit installation folder. Method 1: Automatic Installation via PhoenixSuit Download the latest version of or PhoenixCard .
Connect the device to your PC via USB while continuing to hold the button.
Do not use generic "Allwinner USB driver" files from untrusted forums. The most reliable source is the (version 1.1.0 or later) or the Allwinner Tech official SDK drivers . For the A133 specifically, ensure the package includes usb_driver_windows or Allwinner_USB_Driver_v2.0 .
Both ports support the full range of USB 2.0 speeds: , Full Speed (12 Mbps) , and High Speed (480 Mbps) . In many implementations, the OTG port can also support USB Host mode, typically requiring an external power supply or a powered USB hub.
During the setup process, Windows will prompt you with a security warning asking if you want to install device software from "Allwinner Technology". Click Install or Always Trust .
Flashing (or burning) firmware to an A133 device is often done through a special . When a device is put into this mode (usually by holding a button during boot), it presents itself to a connected PC as a device awaiting new firmware. The USB driver is what allows the PC to see this device. The PhoenixSuit tool is widely used on Windows to flash .img firmware files to Allwinner devices, and it relies directly on the USB driver.
Select from the list, click Next , and confirm the installation warning. Troubleshooting Common Connection Issues
Navigate to the folder where you extracted the Allwinner driver files and click . Essential Tip: Disable Driver Signature Enforcement
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Click .
Ensure the tablet is fully booted into FEL mode (black screen) before launching the software. If it boots straight into the normal Android charging animation, the driver will not engage for flashing. Repeat the button-pressing sequence carefully.
