Datasheet

Figure 11. USB host recognition result
When not using the Interrupt IN endpoint in the CIC interface, a USB device can support up to 15 VCOMs; when using an Interrupt
IN endpoint, a USB device can support up to 7 VCOMs.
If the window system comes with a CDC driver, users do not need to manually install the driver; if the CDC driver
is not installed on the PC, users need to manually drive the driver. For the driver installation, refer to the attached
readme.pdf document.
NOTE
8 Conclusion
Based on the SDK code, this application note implements the function of an FS USB device to multi VCOMs on the K32L2 series
MCU. It can support up to 15 VCOMs, and each VCOM implements the function of returning received data to the host.
9 References
1. AN12458 USB to Virtual COM on LPC54018 and LPC5500.
2. K32L2B3 Reference Manual.
3. USB 2.0 Specification
4. USB in MCU-Signal and Protocol.
5. Access USB Technology and Application based on Microcontrollers.
NXP Semiconductors
Conclusion
USB to Multi VCOM on K32L2 Series MCU, Rev. 0, November 2019
Application Note 24 / 25