What you can do is to put a cap 100nF or more between the reset pin and gnd with the 100k up to vcc still there. This will cause the reset pin to be low until the cap is charged through the 100k. A diode up to vcc will discharge the cap if the power is removed.
Hope this help Christo ----- Original Message ----- From: "Kelly Murray" <k...@netnimble.net> To: <mspgcc-users@lists.sourceforge.net> Sent: Tuesday, July 13, 2004 8:27 AM Subject: [Mspgcc-users] power-on and reset > Hello again, > I've been doing deployment testing of my system(s) using MSP430's. > The problem I have now (which I admit isn't mspgcc specific :) > is the chip does not always run when powered-up. If I hit the reset > (ground RST pin) after it's got power, it always then starts/runs > correctly. In fact, I don't always even need to ground the rst pin, > just touching it with some tweezers before making the ground contact, > and it will get it going. I have a 83K resistor between +3.0v and the > rst pin. I've used a 33K one, same result. TI says use a 100K resistor. > > Any suggestions? So far, this is killer unreliability! > > -Kelly Murray >
