Do you have a scope? Any overshoot/bounce crap? (Not likely with low
power
CMOS.)
Attached is screenshot from USB-based scope. I'll going to switch wires
to see any difference.
--
WBW,
V.P.attachment: gps2rtc.PNG___
time-nuts mailing list
To answering myself: I think nothing wrong with DS32XX. I hooked up GPS
1PPS output to the same timer (different channel) where I have 1PPS from
RTC. Now I see something like this.
# Delta GPS: 7330, Delta RTC: 7330
# Delta GPS: 7330, Delta RTC: 7329
# Delta GPS: 7330, Delta RTC: 7329
#
I would like to ask if somebody did measurement for that Dallas DS32XX
series chips. Is that 1PPS (1HZ square wave) stable there or it has some
issues ? I am thinking that burp in my tests could be because of my
poor code or may be because of DS32XX doing temperature conversion every
# Delta GPS: 3659, Delta RTC: 3660
# Delta GPS: 3659, Delta RTC: 3659
# Delta GPS: 3658, Delta RTC: 1984
# Delta GPS: 3658, Delta RTC: 1984
# Delta GPS: 3659, Delta RTC: 3659
# Delta GPS: 3659, Delta RTC: 3660
I would like to ask if somebody did measurement for that Dallas DS32XX
