The USB serial I/O library (LIBUSBSIO) is a library and associated API provided for programmers to develop host-side applications to communicate with serial I/O devices connected to via the USB bridge on LPC-Link2 and MCU-Link debug probes on supported NXP microcontroller evaluation boards. The standalone MCU-Link Pro debug probe is also supported. The LIBUSBIO library converts all API calls into USB messages which are transferred to the debug probe, which in turn communicates a target devices via I2C, SPI or GPIO interfaces. To make the USB device install free on host systems, LPCUSBSIO uses USB-HID class as the transport mechanism. The LIBUSBSIO library may also be used with the MCUXpresso SEC provisioning tools and the NXP Secure Provisioning SDK .
LIBUSBSIO can be used in place of the LPCUSBSIO formerly available for LPC microcontrollers, and supports the same API.