Look at the page 29 of MSP430 datasheet -- it has the data about how much current the MCU can source and sink through the IO pins (http://focus.ti.com/lit/ds/symlink/msp430f169.pdf).
Rob On 2/15/06, Michael Schippling <[EMAIL PROTECTED]> wrote: > also, once all that is settled, make sure that you are not > trying to draw too much current from the pin to turn on your > sensor. The ATMEGA specs say 40mA max, I don't have the telos > chip specs but it's probably similar. Anyway I think that is > pushing it, I'd be more comfortable with <10mA. > MS > > Matthew J Whelan wrote: > > The output voltage of the GIO set high should be the about same as your > > battery voltage. Do you have the P2.0 pin setup right? > > P2SEL &= ~(0x01); //Sets P2.0 to GIO > > P2DIR |= 0x01; //Sets P2.0 to output > > P2OUT |= 0x01; // Sets P2.0 high > > What about the P6.3 (since the ADC3 input is wired to pin 10 as well)? > > P6SEL &= ~(1<<3); //Sets P6.3 to GIO > > P6DIR |= ~(1<<3); //Sets P6.3 to input > > > > Is there some significant load on your signal which is causing it to > > drop in voltage? > > > > Regards, > > Matt > > > > > > [EMAIL PROTECTED] wrote: ----- > > > > To: [email protected] > > From: pinky tejwani <[EMAIL PROTECTED]> > > Sent by: [EMAIL PROTECTED] > > Date: 02/15/2006 02:21PM > > Subject: [Tinyos-help] GIO -- Output Voltage. > > > > Hello All, > > I have written a code for bit-banging using the TOSH macros for > > General I/O pins. > > Platform - TelosB/TmoteSky > > The voltage that I get on the pin 10 of U2 connector is 1.3 or 1.5 V > > maximum. > > > > The aim of the exercise is to use one of the digital output pins to > > switch on/off a sensor. Can someone tell me if there is a way to make > > the digital output voltage to be above 2 V ? > > ( I am trying to avoid using an external circuit to do that ) > > > > Hope to hear from someone. > > > > Thanks, > > Pinky Tejwani. > > Clemson University. > > > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > > > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > > > > > > ------------------------------------------------------------------------ > > > > _______________________________________________ > > Tinyos-help mailing list > > [email protected] > > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
