04b4:6831 — Storage Adapter ISD-300LP (CY) (Cypress Semiconductor Corp.)

What is this device?

This is the USB identifier for a Storage Adapter ISD-300LP (CY) manufactured by Cypress Semiconductor Corp.. The vendor ID 04b4 is registered to Cypress Semiconductor Corp. with the USB Implementers Forum, and 6831 is the product ID that Cypress Semiconductor Corp. assigned to this particular model. When you run lsusb on Linux, this device appears as 04b4:6831 Cypress Semiconductor Corp. Storage Adapter ISD-300LP (CY).

How to identify it on your system

Linux

$ lsusb
Bus 001 Device 004: ID 04b4:6831 Cypress Semiconductor Corp. Storage Adapter ISD-300LP (CY)

You can filter directly with lsusb -d 04b4:6831, or get the full descriptor dump with lsusb -v -d 04b4:6831. Kernel messages from dmesg show the same pair as idVendor=04b4, idProduct=6831.

Windows

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

USB\VID_04B4&PID_6831
USB\VID_04B4&PID_6831&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_04B4&PID_6831"

macOS

$ system_profiler SPUSBDataType
    Storage Adapter ISD-300LP (CY):
      Product ID: 0x6831
      Vendor ID: 0x04b4  (Cypress Semiconductor Corp.)

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. Cypress Semiconductor Corp. official support →

Raw usb.ids entry

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

04b4  Cypress Semiconductor Corp.
	6831  Storage Adapter ISD-300LP (CY)

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