Tagged Questions

6
votes
1answer
1k views

Selecting Loading Capacitor Values for 32 kHz Crystal

I need some help selecting loading capacitors for a 32.768 kHz XTAL in a design I'm working on. This is a bit long, but the big questions are: Is it critical to get the loading cap values right, and ...
4
votes
1answer
519 views

Using 22pF load caps with 16MHz crystal on atmega328p fails to work

I'm having a hard time figuring out why after attaching 22pF load caps to a 16 Mhz crystal on atmega328p my whole project (aka flashing leds) does not work. Once i remove the load caps everything ...
1
vote
3answers
280 views

Stray Capacitance for Crystals

I am trying to set up a circuit with a 14.31818MHz crystal (PAL decoding). The data sheet for the chip, using the crystal, states the relationship between the two capacitors, connecting the crystal to ...
4
votes
1answer
4k views

How to design the capacitors used with Crystal Oscillators?

I have seen circuits involving crystal oscillators connecting two capacitors between each of the crystal legs and ground. I would like to know how to design the value of these capacitors for different ...