LPC1549 RTC goes forward 5-6 sec per hour

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jul 6, 2017 by Michel Kuenemann
Content originally posted in LPCWare by TheEngineer on Tue Feb 24 05:53:33 MST 2015

I'm trying to use internal RTC of LPC1549 with 32Hkz cyristal and 33pf capacitors. (Capacitor value is proper according to calculation formula at UM). When i power off the controller, everything is OK, however RTC counter goes forward 5-6 sec per hour if power is on.
I can't figure out , and almost going crazy.

Any help would be very appreciated.