Wednesday, May 19, 2010

8284 Clock Generator using an external source for its frequency

Question
Modify the following  8284A clock generator circuit if it will be using an external frequency from another source.



Answer

EFI - changed from earth to the OSC input from other 8284A (EFI=external frequency input)
F/C' - changed from earth to Vcc (5v) because now the chip is using F(requency) input instead of C(rystal) input
Both X1 & X2 - grounded

Illustrated here

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