0525:a4a0 — Linux-USB "Gadget Zero" (Netchip Technology, Inc.)

What is this device?

This is the USB identifier for a Linux-USB "Gadget Zero" manufactured by Netchip Technology, Inc.. The vendor ID 0525 is registered to Netchip Technology, Inc. with the USB Implementers Forum, and a4a0 is the product ID that Netchip Technology, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as 0525:a4a0 Netchip Technology, Inc. Linux-USB "Gadget Zero".

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID 0525:a4a0 Netchip Technology, Inc. Linux-USB "Gadget Zero"

You can filter directly with lsusb -d 0525:a4a0, or get the full descriptor dump with lsusb -v -d 0525:a4a0. Kernel messages from dmesg show the same pair as idVendor=0525, idProduct=a4a0.

Windows

In Device Manager, open the device, go to Details → Hardware Ids. This device reports:

USB\VID_0525&PID_A4A0
USB\VID_0525&PID_A4A0&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0525&PID_A4A0"

macOS

$ system_profiler SPUSBDataType
    Linux-USB "Gadget Zero":
      Product ID: 0xa4a0
      Vendor ID: 0x0525  (Netchip Technology, Inc.)

Driver help

Having driver issues with this device? Most USB devices are handled by a generic class driver; if yours shows up as an unknown device, confirm the ID above first, then check the manufacturer's downloads page.

Raw usb.ids entry

The exact lines this page is generated from, in the upstream source file:

0525  Netchip Technology, Inc.
	a4a0  Linux-USB "Gadget Zero"

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