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 -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu