In SX Microcontrollers, SX/B Compiler and SX-Key Tool, MyYz400 wrote:

I'm currently using a Parallax developing board for the SX.  I would like to create my own PCB to run the SX on.  How-ever I'm having difficulties finding schematics for a simple SX PCB setup.

I'm not an electrical engineer so most common practices still aren't obvious to me.

I spoke with someone who has done circuit design, and he recommended few things, but I wonted to run it by people who have done this before.  Here is what he suggested

-Always use a voltage regulator, regardless if using a 5V power supply. (for safety it sounds like)
-Put 0.1u and 10u caps close to the IC's Vdd as possible.  (electrolytic? or no)
-Use large ground planes to fight noise (ok, makes sense)
-Put power on bottom plain, and signals on top (is this necessary?)


My other questions are:

-does the SX key really only use the OSC1/OSC2;Vdd;Vss?  Does the IC get programed through the OSC ports?
-Can I just use the interal clock of the SX?  Does this mean I need to use the external R/C circuit?


I'm just trying to get an idea of what is needed to run the SX out-side the tech board.  Anyone know of some articles or schematics to help show this?

Thanks


MyYz400

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