Posted on March 19, 2018 at 11:33@ S/T specialists: what is the initial accuracy for the STM32 main clock ? If it is good enough, you can make a frequency meter with another STM32 by counting fclock during 32kHz period. The accuracy is made by S/T a...
Posted on March 08, 2018 at 14:40Fine. As suggested by Danilotto Runi, make a quick calculations with the Application Note regarding ESR and max power for your resonator.Theo
Posted on March 08, 2018 at 14:01thanks for the like.To be complete, capacitors should be 22pF/C0G class and at 32kHz, the crystal is thick and you can't destroy it even at full power. But you can tweak it to reduce power consumption.Theo
Posted on March 08, 2018 at 11:56Your design is wrong. You should have 6pF for (C16.C17/C16+C17) + Cx, with Cx tracks + STM32 pins capacitance (few pF).Crystals with CL=6pF are made for direct connection to microcontroller/RTC and hard to design.Tak...
