In SX Microcontrollers, SX/B Compiler and SX-Key Tool, gtslabs wrote: "Use the RTCC input (only 8 bits, you can get a 9th bit on the SX48) Use a port B external interrupt." My max input frequency is 1,000 hz down to 1 Hz. I am using a 4Mhz osc to get my timer1 output frequency low enough. Can I still use Serin and Serout in my main code with these 2 interrupt methods? ---------- End of Message ---------- You can view the post on-line at: http://forums.parallax.com/forums/default.aspx?f=7&p=1&m=148780#m235668 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)