In SX Microcontrollers, SX/B Compiler and SX-Key Tool, George Herzog wrote: Thanks Bean, The problem is that I really don't think I can easily provide the grounds as the board stands, so cross talk may s have to live or die on its own. I can modify the board and get alternating grounds to maybe 3 of the ports, but certainly not to all. RC will require me cutting the Vdd line on one pin. Why bother? I think that ribbon cables are much less trouble for proto-typing than rigid connectors, especially as the pin count causes friction to become a problem. [I am forever bending 40 Pin DIPs.] Individual wires are tedious and problematic in their own right. So, I guess I am trying to say that in the next generation of proto-boards.... give a bit of room for ribbon cables. I imagine at the higher speeds the crosstalk becomes worse. And, 40PIN DIP will never be as popular. If Parallax were to provide RA with a 16 pin and RC and RB with a 32 pin, that might be enough. One could always build a split cable on the 32 pin to send RC to one board and RB to another. RE has the reset button next to it and may be a problem to configure RD is next to the microprocessor and a ribbon cable might interfer with cooling and just melt. I really like the fact that both DIP8's and SOIC8's are taking nearly the same footprint - smart thinking. Admittedly, these suggestions might cause the board to become a little bigger. . . but one might shift the reset nearer to the LED and shift the X-2 XTAL and the SX-48/58 closer to the bottom left corner. Then keeping RE and RD in the same place, but with a row of grounds and shifting all else 0.2 to the right might get you clearances on the same size board. Food for thought. Bye. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=88699#m88756 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2005 (http://www.dotNetBB.com)