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

Nice, neat layout! I would also recommend using an LM2940 for the regulator, which has all kinds of built-in protections, including reverse battery protection. It requires a low-ESR filter cap, though, close to the output pin. If you can find room near there to add a 22uF tantalum, that would be great. Also, your schematic shows a 1000uF cap on Vdd. Double check the footprint of the cap you've got on your layout. It looks a bit small to accommodate a 1000uF electrolytic. Finally, if you intend to use your SX-Key port for debugging, use a socket for the crystal, so you can remove it. (I usually design in a 5-pin SX-Key header with a removeable jumper on the top two pins that connects the crystal/resonator to the SX when the SX-Key is not plugged in.)

-Phil

---------- End of Message ----------


You can view the post on-line at:
http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=224240#m224407

Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com

The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2007 (http://www.dotNetBB.com)