0
\$\begingroup\$

Trying to connect ASE-14.31818MHZ-LC-T standard clock oscillator to STM32L073. According to datasheet, oscillator output signal should be connected to OSC_IN pin:

enter image description here

Internal STM32L073 oscillator schematic:

enter image description here

In bypass mode the HSE oscillator is switched off and the input pin is a standard GPIO.The external clock signal has to respect the I/O characteristics.

Should I keep OSC_OUT floating?

\$\endgroup\$
2
  • 1
    \$\begingroup\$ If the datasheet does not tell something else, you can leave OSC_OUT unconnected. (floating is a different thing) \$\endgroup\$
    – Stefan Wyss
    Commented Nov 3 at 17:39
  • \$\begingroup\$ Where would you connect OSC_OUT then? It's GPIO the internal oscillator is off. \$\endgroup\$
    – Justme
    Commented Nov 3 at 18:32

1 Answer 1

Reset to default
1
\$\begingroup\$

The OSC_OUT is not even reserved for crystal amplifier output when the amplifier is bypassed. It can be used as GPIO as you wish.

\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.