hi, i need program for interfacing serial,parallel,ethernet and USB using 89c51 in microcontroller.........please help me get it..............or otherwise send me the site where i can get....please reply soon.......
for usb u need to use chip with usb support just try "USB IN A NUTSHELL" pdf if u r trying to interface with microcontroller.Try atmel website for microcontroller with USB support
for eather net i think there a chips avaliable with built in module