Dan Michaels <oricom@LYNX.SNI.NET> wrote:
>Good question. In the Electronic Design article someone
>else mentioned, they use an external oscillator chip to
>drive OSC1 at 32 Khz, by overriding the normal xtal, X1.
>
>They have a series resistor, named Rsafe = 150 ohms, in
>the line to protect X1.

Why would the Xtal blow if X1 is shorted to GND or grounded ? I'd rather
expect the drivers in the PIC or in the external chip to be temporarily
overloaded with a quantity of energy that is unbelievably small (The
energy stored in the Xtal at maximum deflexion during one half of an
oscillation cycle - assuming that the switching occurs then). Am I missing
something ?

Peter

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