Re: Regarding MAX232!
eric,
with regards to your question regarding the need to invert signals from max232,i would like to say you need not do so.max 232 is a RS232
interface.In RS232 protocal, positive logic ranges from -3v to -25v and negative logic ranges from +3v to +25 v. to convert this to TTL compatible signals you need MAX232 or MAX233 if your PCB space is tight.
Now if you want to output any data through max232, you can do so
with the help of UART(16C450).