Design Notes-2

Log for smd XTAL problem:

- At first ECX-53B 20MHz XTAL is mounted with two 22pF capacitors. The pic is programmed but does not work.

- Then ECX-53B unmounted and a normal dip XTAL is mounted while 22pF capacitors still mounted. The pic does not work again.

- The normal dip XTAL is unmounted and a programming test is performed without any XTAL successfully.

- 22pF capacitors are unmounted and the pic is tested using the normal dip XTAL and works.

- Then ECX-53B (previously unmounted one) is mounted again without 22pF capacitors and the pic works for about 3 minutes.

- A new ECX-53B is mounted without 22pF capacitors and the pic works (and still working with this XTAL). At this last step the inconsistency between ECX-53B's mentioned in "Quick Notes-1" post is realized.