> -----Original Message-----
> From: Mike W [SMTP:mike@CORN2.FREESERVE.CO.UK]
> Sent: Monday, February 10, 2003 11:39 AM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [PIC} 16F84 External Osc query
>
> Hi Folks,
>
> In the 16F84 data sheet ( 8.2.3 of DS30430C ) mention is made to
> using external TTL and Xtal Osc modules into OSC1 pin.
>
> It also mentions ( 8.2.4 ) an Fosc/4 signal being available from
> OSC2 pin when in RC mode.
>
> Is this Fosc/4 signal available on OSC2 while driving OSC1 from an
> external TTL oscillator in XT or HS mode ?.
>
> thanks Mike W
>
No, in LP,XT or HS mode the two OSC pins are connected via an inverter which
is biased with an internal resistor.  The signal on OSC2 will be at the same
frequency as the signal applied to OSC1, albeit phase shifted.

Regards

Mike

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