0403:cff8 — Amontec JTAGkey

This is the USB identifier for a Amontec JTAGkey manufactured by Future Technology Devices International, Ltd. The vendor ID 0403 is registered to Future Technology Devices International, Ltd with the USB Implementers Forum, and cff8 is the product ID that Future Technology Devices International, Ltd assigned to this particular model. When you run lsusb on Linux, this device appears as 0403:cff8 Future Technology Devices International, Ltd Amontec JTAGkey.

Linux

$ lsusb
Bus 001 Device 004: ID 0403:cff8 Future Technology Devices International, Ltd Amontec JTAGkey

You can filter directly with lsusb -d 0403:cff8, or get the full descriptor dump with lsusb -v -d 0403:cff8. Kernel messages from dmesg show the same pair as idVendor=0403, idProduct=cff8.

Windows

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

USB\VID_0403&PID_CFF8
USB\VID_0403&PID_CFF8&REV_0100

From PowerShell: Get-PnpDevice | Where-Object InstanceId -match "VID_0403&PID_CFF8"

macOS

$ system_profiler SPUSBDataType
    Amontec JTAGkey:
      Product ID: 0xcff8
      Vendor ID: 0x0403  (Future Technology Devices International, Ltd)

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. Future Technology Devices International, Ltd official support →

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

0403  Future Technology Devices International, Ltd
	cff8  Amontec JTAGkey

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• 0403:d010 SCS PTC-IIusb
• 0403:d011 SCS Position-Tracker/TNC
• 0403:d012 SCS DRAGON 1
• 0403:d013 SCS DRAGON 1

See all 179 devices from Future Technology Devices International, Ltd →