rs232 uart ip :: user guide

Chapter 7 of the "embedded peripherals ip user guide (https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/ug/ug_embedded_ip.pdf)".

Your 'address' wire input will need to be a little wider...

If you want to connect only part of a bus to a narrower signal you can always specify the bits of the bus you wish to connect.

e.g.

.writedata (writedata),    // .writedata

Cheers,

Alex