Hierarchy	Input	Constant Input	Unused Input	Floating Input	Output	Constant Output	Unused Output	Floating Output	Bidir	Constant Bidir	Unused Bidir	Input only Bidir	Output only Bidir
txd	18	15	0	15	1	15	15	15	0	0	0	0	0
baud_rate_gen	2	0	0	0	1	0	0	0	0	0	0	0	0