[51] how to calculate crytal capasitor value

[Revanth Machineni]

hello friends, can u tell me how to calculate crystal capacitor values. n rectifier cap values. n how to learn c programming for 8051, as i know c but i am unable to understand that 8x80 like that .

Thanks in advance friends

 

[KlausST]

Hi,

can u tell me how to calculate crystal capacitor values

You wiil find the single resonant capacitor value in datasheet.

Usual circuits use two capacitors (one at each leg of xtal) therefore it acts like a series connection of those two capacitors.
Then you need twice the datasheet-value for each capacitor.

example: if given in datasheet: 17pF --> then use two 33pF (ceramics COG/NP0 are a good selection)


Klaus