Datasheet

Figure 6. Callback function processing
When the USB host recognizes that a USB device is plugged into the USB interface, it starts an enumeration process. The
essence of USB enumeration is the process in which the USB host obtains the parameter information of the USB device and
configures the configurable parameters. The USB enumeration process is done in the USB interrupt service function. The
processing flow of the USB interrupt service function is shown in Figure 7.
NXP Semiconductors
Software workflow chart
USB to Multi VCOM on K32L2 Series MCU, Rev. 0, November 2019
Application Note 10 / 25