You can see picture
LPC1768 have 40 PIN or 40 I/O
Microcontrollers excess Ethernet so its is can connect to world
The mbed microcontrollers support lots of interfaces, so you can connect them to all sorts of input and output circuits and modules.
Downloading programs is as simple as using a USB Flash Drive. Plug it in, drop on your program binary, and you're up and running!