C51: USB DONGLE NOT RECOGNIZED
Information in this article applies to:
An LPT dongle works on a PC, but a USB dongle does not. The latest Sentinel drivers for the USB dongle are installed, but µVision still displays
warning C500: MISSING DEVICE (SECURITY KEY NOT FOUND)
when the project builds. Windows Device Manager shows the correct USB device. What could be wrong?
Installing a Serial Number or an Add-on Disk designed for LPT dongles will cause this warning. USB dongles require a different Serial Number and Add-on Disk than LPT dongles.
Install the Keil tools using the Serial Number and Add-on Disk supplied with the USB dongle.
If you are changing from an LPT dongle to a USB dongle on the same PC, you may either:
Last Reviewed: Friday, January 12, 2007
of your data.