i was designing a digital clock i got a problem about 32.768KHz crystal on timer 2
the problem is the datasheet says:
A crystal can
then be connected between the TOSC1 and TOSC2 pins to serve as an independent clock
source for Timer/Counter2. The Oscillator is optimized for use with a 32.768kHz crystal. Applying an external clock source to TOSC1 is not recommended.
but my TOSC1 is already connected to another thing
is there gonna be any problem if i connect the crystal between the TOSC2 pin and the ground?
if so how should i connect the the crystal ? just put it between them? no capacitors?
the second problem is driving 16 seven-segments.
i want something just to increase the current so the Micro Controller wont be in any problem driving 16 seven-segments
and i don't want that driver to invert like uln2803.
how is the Udn2981?
is good for driving?
one Udn2981 for port C
one for port A
and one for PORT D
i tried to stimulate it in Proteus but the Udn2981 does not work in the stimulation
here is the picture