Need COM1 and COM2 implementation details

VMSEAGLE New Member Posts: 27

According to the UP Squared Professional block diagram for the E3950, serial ports COM1 and COM2 are "behind" an F81216 LPC to UART chip. The F81216 data sheet shows the F81216 as a single LPC to UART chip.

Are the COM1 and COM2 ports part of the F81216 or are they really behind the F81216 and separate F81438G chip implementations ? Do the COM1 and COM2 ports look to be direct PCIe devices (that is, the F81216 is transparent) or does the F81216 look like some type of bridge or adapter ? If so, what does the bridge/adapter look like (ISA, XBUS, etc.) ? Thanks.