Hello, I am trying to use a surface mount crystal for the RTC clock on the STR912F microcontroller. The datasheet states that the load capacitance is 8pF (Typ). Unfortunately, I am unable to find an SMD crystal with that load capacitance. I can, however, find 7pF and
9pF. Can they be used? Any hints or ideas?Thank you,
A
No, Yes. Look at other crystals!
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Your not just mating the XTAL to the CPU. The traces in between add several pF of capacitance as well. So find an XTAL with 10-12pF (12.5pF is common).
Eric
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