I'm looking at the design of a large video-wall type application & thinking about the optimum data transmission method... Controller will need to send something like 80 simultaneous serial streams of around 8-10mbits/sec each over about 20 metres - probably using shielded cat5 cable. May be using SPI (with clock gaps for block sync) , so could be 160 channels to send. Probably want to connect about 6 receivers to each feed at the far end, receivers within 3m of each other. RS422 would be the obvious choice, but also thinking about lvds, due to lower power, EMI emissions and availability of wide transmitter packages. Any thoughts ? -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist