Cristian Paul Pe?aranda Rojas wrote: > Oh, i think I'm using such setup with my GPS receiver board, what you > suggest then for better signal integrity?
Way to improve signal integrity include: - using an extension board instead of a cable, - making an extension board that translates to a 100 mil Nx2 connector/header with the signals on one row and ground on the other row, so that you get a ground wire between signals on the ribbon cable, - making the signals rise and fall as slowly as possible (slew rate, drive strength, caps, ...), - keeping the cable as short as possible. > For now the ribbon cable is short no more than 15 cms and i debugged > signals under scope and logic analyzer seems "Ok". :-) If it ain't broke don't fix it ;-) I don't really know at what distances you should expect trouble. 15 cm may be short enough. Joerg suggested on #qi-hardware that, with signals in the 10 MHz range, you may be able to survive up to 50 cm. But, in addition to not having ground between the signals, you also have to consider the distance the signals travel in M1, on your board, and any small imperfections that may exist in your circuit, such as mismatched termination, etc. - Werner _______________________________________________ http://lists.milkymist.org/listinfo.cgi/devel-milkymist.org IRC: #milkymist@Freenode
