Hi Bruce -- Good point; I'll leave it to the software guys to figure that out. :-)
John ---- Bruce Griffiths said the following on 04/01/2009 06:11 PM: > John > > Providing a 5MHz output will be difficult/impossible if the PIC is > clocked at 10MHz as a pin will have to be toggled with every instruction. > Surely this will leave no time for executing other instructions to > produce other output frequencies? > > It may be possible to do this using inline code with no conditional > branches if and only if one can loop back to the start of the code > without requiring an extra cycle. > It would probably be easier to use a dedicated hardware divider > (external flipflop or internal timer) to generate the 5MHz output. > > Bruce > > John Ackermann N8UR wrote: >> You could probably get those output frequencies with a custom version of >> the PIC code. There shouldn't be any hardware changes needed, though >> the circuit board layout wasn't optimized for high frequencies so no >> guarantee on 5 MHz. >> >> The PIC source code will be available, so anyone who wants to modify it >> for other outputs can have at it. >> >> John >> ---- >> >> Mitchell Janoff said the following on 04/01/2009 05:37 PM: >> >>> In your post, you mentioned that the TADD-2, will have six low impedance >>> outputs that can be individually jumpered to 1 PPS or 10 Hz through 10 kHz >>> outputs. I was wondering if there was a way to provide outputs of 100k, 1MHz >>> and 5MHz (assuming a 10MHz source). I am looking for a way to use a single >>> source such as a z3801 as the standard for my various counters and clocks. >>> There was also a post to build this using divide by 10,2 and 5 IC's. If >>> someone is going to build this circuit can they provide the schematic? If >>> there multiple people interested we can have a circuit board created for >>> this project. >>> >>> Thanks, >>> >>> Mitch >>> KC2MFB >>> >>> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
