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Forcing an oscillator fail on an M41T83

MWeyg.1
Associate

‎2020-01-31 11:56 AM

We are having strange problems with some of our products that use the M41T83. I'd like to try forcing an oscillator fail in order to see how our product behaves. Is there any way to do this? I tried writing to the Flags register (0x0F) but the values are left unchanged.

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1 REPLY 1
Winfred LU
ST Employee

‎2020-02-05 09:32 PM

Please try to set ST bit to 1.

The following conditions can cause the OF bit to be set:

  • The first time power is applied (defaults to a '1' on power-up).
  • The voltage present on VCC or battery is insufficient to support oscillation.
  • The ST bit is set to '1.'
  • External interference of the crystal

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