/dev/ttyU*
for callin ports
Usb support for serial adapters based on chips made by moschip
device usb device ucom device umoscom
In loader.conf(5): umoscom_load="YES"
The umoscom driver provides support for various serial adapters based on chips from MOSCHIP.
The device is accessed through the ucom(4) driver which makes it behave like a tty(4).
/dev/ttyU*
for callin ports
/dev/ttyU*.init
/dev/ttyU*.lock
corresponding callin initial-state and lock-state devices
/dev/cuaU*
for callout ports
/dev/cuaU*.init
/dev/cuaU*.lock
corresponding callout initial-state and lock-state devices
25 releases since FreeBSD 11.0-RELEASE; the text changed 12 times.