Datasheet

Figure 8. USB device reset process
The main thing to do in the reset interrupt is to set the USB device to the default state and initialize the control IN pipe and OUT
pipe.
5.1.2 Token done interrupt processing
If it is a Token done interrupt, the program executes the process shown in Figure 9.
NXP Semiconductors
Software workflow chart
USB to Multi VCOM on K32L2 Series MCU, Rev. 0, November 2019
Application Note 12 / 25