I am have an issue with a few RCM3315 based devices where the RTC stops counting
when the device is powered OFF. BBRAM is fine. RTC start counting where it
left off when power is re-applied.
My main board hasn't changed since 2005. I only have a few devices with
this issue.
/RES, /RESET_IN and VRAM are unconnected.
VBAT_EXT is connected directly to a CR2032.
Any ideas where to start looking?
RTC Stops while on battery - RCM3315
Started by ●January 12, 2017
Reply by ●January 12, 20172017-01-12
Hi
Almost in Rabbit RCM 3700 the problem is the reset pull up resistance. Yo
can disconnect the pull up resistance or put a higher pull up resistance
Omar
El 01/12/2017 14:52, "a...@yahoo.com [rabbit-semi]" <
r...> escribió:
> I am have an issue with a few RCM3315 based devices where the RTC stops
> counting when the device is powered OFF. BBRAM is fine. RTC start
> counting where it left off when power is re-applied.
> My main board hasn't changed since 2005. I only have a few devices with
> this issue.
>
> /RES, /RESET_IN and VRAM are unconnected.
>
> VBAT_EXT is connected directly to a CR2032.
> Any ideas where to start looking?
Almost in Rabbit RCM 3700 the problem is the reset pull up resistance. Yo
can disconnect the pull up resistance or put a higher pull up resistance
Omar
El 01/12/2017 14:52, "a...@yahoo.com [rabbit-semi]" <
r...> escribió:
> I am have an issue with a few RCM3315 based devices where the RTC stops
> counting when the device is powered OFF. BBRAM is fine. RTC start
> counting where it left off when power is re-applied.
> My main board hasn't changed since 2005. I only have a few devices with
> this issue.
>
> /RES, /RESET_IN and VRAM are unconnected.
>
> VBAT_EXT is connected directly to a CR2032.
> Any ideas where to start looking?
Reply by ●January 12, 20172017-01-12
Hi
Almost in Rabbit RCM 3700 the problem is the reset pull up resistance. Yo
can disconnect the pull up resistance or put a higher pull up resistance
Omar
El 01/12/2017 14:52, "a...@yahoo.com [rabbit-semi]" <
r...> escribió:
> I am have an issue with a few RCM3315 based devices where the RTC stops
> counting when the device is powered OFF. BBRAM is fine. RTC start
> counting where it left off when power is re-applied.
> My main board hasn't changed since 2005. I only have a few devices with
> this issue.
>
> /RES, /RESET_IN and VRAM are unconnected.
>
> VBAT_EXT is connected directly to a CR2032.
> Any ideas where to start looking?
Almost in Rabbit RCM 3700 the problem is the reset pull up resistance. Yo
can disconnect the pull up resistance or put a higher pull up resistance
Omar
El 01/12/2017 14:52, "a...@yahoo.com [rabbit-semi]" <
r...> escribió:
> I am have an issue with a few RCM3315 based devices where the RTC stops
> counting when the device is powered OFF. BBRAM is fine. RTC start
> counting where it left off when power is re-applied.
> My main board hasn't changed since 2005. I only have a few devices with
> this issue.
>
> /RES, /RESET_IN and VRAM are unconnected.
>
> VBAT_EXT is connected directly to a CR2032.
> Any ideas where to start looking?
Reply by ●January 16, 20172017-01-16