0400:a000 — Smart Display Reference Device
National Semiconductor Corp.
- Vendor ID
- 0400
- Product ID
- a000
- Combined
- 0400:a000
- Decimal
- 1024:40960
What is this device?
This is the USB identifier for a Smart Display Reference Device manufactured by National Semiconductor Corp.. The vendor ID 0400 is registered to National Semiconductor Corp. with the USB Implementers Forum, and a000 is the product ID that National Semiconductor Corp. assigned to this particular model. When you run lsusb on Linux, this device appears as 0400:a000 National Semiconductor Corp. Smart Display Reference Device.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID 0400:a000 National Semiconductor Corp. Smart Display Reference Device
You can filter directly with lsusb -d 0400:a000, or get the full descriptor dump with lsusb -v -d 0400:a000. Kernel messages from dmesg show the same pair as idVendor=0400, idProduct=a000.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_0400&PID_A000 USB\VID_0400&PID_A000&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0400&PID_A000"
macOS
$ system_profiler SPUSBDataType
Smart Display Reference Device:
Product ID: 0xa000
Vendor ID: 0x0400 (National 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.
Raw usb.ids entry
The exact lines this page is generated from, in the upstream source file:
0400 National Semiconductor Corp. a000 Smart Display Reference Device