c251:2710 — ULink
Keil Software, Inc.
- Vendor ID
- c251
- Product ID
- 2710
- Combined
- c251:2710
- Decimal
- 49745:10000
What is this device?
This is the USB identifier for a ULink manufactured by Keil Software, Inc.. The vendor ID c251 is registered to Keil Software, Inc. with the USB Implementers Forum, and 2710 is the product ID that Keil Software, Inc. assigned to this particular model. When you run lsusb on Linux, this device appears as c251:2710 Keil Software, Inc. ULink.
How to identify it on your system
Linux
$ lsusb Bus 001 Device 004: ID c251:2710 Keil Software, Inc. ULink
You can filter directly with lsusb -d c251:2710, or get the full descriptor dump with lsusb -v -d c251:2710. Kernel messages from dmesg show the same pair as idVendor=c251, idProduct=2710.
Windows
In Device Manager, open the device, go to Details → Hardware Ids. This device reports:
USB\VID_C251&PID_2710 USB\VID_C251&PID_2710&REV_0100
From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_C251&PID_2710"
macOS
$ system_profiler SPUSBDataType
ULink:
Product ID: 0x2710
Vendor ID: 0xc251 (Keil Software, 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:
c251 Keil Software, Inc. 2710 ULink