LPCOpen Platform for LPC112X microcontrollers  112X
LPCOpen Platform for the NXP LPC112X family of Microcontrollers
NXP USB device Library
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USBDLIB is a USB device stack library that is provided in the ROM of some NXP devices using the USB ROM API function calls. For devices without the USB ROM API, USBDLIB is provided as a standalone linkable library that provides the same functionality and API as the USB ROM API.

USBD ROM Stack online documentation