Overdriving LSI oscillator by external oscillator

st2399 · ‎2013-08-23

Posted on August 23, 2013 at 15:06

Hi everyone,

I overdrive the low-speed internal oscillator by external source with a small offset and small swing.

Where can I find parameters for external clock(without bypassing LSI osc)?

Thanks.

Eugene

#lsi #oscillator

Tesla DeLorean · ‎2013-08-23

Posted on August 23, 2013 at 15:39

Not sure I understand, you should be able to supply an external clock for LSE of up to 1 MHz, but would need to set LSE bypass mode so as not to be driving OSC32_OUT.

Both LSI and LSE can be operated together, or separately.

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st2399 · ‎2013-08-23

Posted on August 23, 2013 at 16:12

The oscillator is 32768 Hz. External and internal oscillators are working together.

I meant, is it possible to supply from external oscillator without bypass mode driving the OSC32_IN?

If it is, where can I find signal parameters for OSC32_IN pin?

Thanks