Hello,
Recently I have created PCB with Pierce oscillator. Unfortunately it is not oscillating at all.
Adding the schematics below.
XTAL is - LFXTAL002996BULK - frequency of 32.7680kHz and load capacitance - 12.50pF
I have tried to work with capacitors : 15pF and 30pF
I have tried to remove R1 and to put it to value of 10Mohm
I have tried to set R2 to 2Kohm or to 158Kohm.
input of my u2 (A) is always near 1.2v and the output is the VDD (2.5V)
As I understand the inverter understand the 1.2v as logical '0' so the output is always logical '1'.
I have already tried manually to set A to 0v and to 2.5v to make the oscilator awake but no luck there.
Waiting for your help
Recently I have created PCB with Pierce oscillator. Unfortunately it is not oscillating at all.
Adding the schematics below.
XTAL is - LFXTAL002996BULK - frequency of 32.7680kHz and load capacitance - 12.50pF
I have tried to work with capacitors : 15pF and 30pF
I have tried to remove R1 and to put it to value of 10Mohm
I have tried to set R2 to 2Kohm or to 158Kohm.
input of my u2 (A) is always near 1.2v and the output is the VDD (2.5V)
As I understand the inverter understand the 1.2v as logical '0' so the output is always logical '1'.
I have already tried manually to set A to 0v and to 2.5v to make the oscilator awake but no luck there.
Waiting for your help