In SX Microcontrollers, SX/B Compiler and SX-Key Tool, g_daubach wrote: The SX 28 data sheet states that the port data registers are undefined at power-on, and remain unchanged on all other reset reasons. I think it is a good habit to _first_ write the expected output states to the data registers, and _then_ configure pins as outputs in the startup code. ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=107860#m108399 Need assistance? Send an email to the Forum Administrator at forumadmin@parallax.com The Parallax Forums are powered by dotNetBB Forums, copyright 2002-2006 (http://www.dotNetBB.com)