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MSP430F2619: Microcontroller is reporting that XIN is failing and not clearing the External Oscillator fault flag.

Michael Sullivan
Prodigy 10 points
Part Number: MSP430F2619


Tool/software:

Issue: Microcontroller is reporting that XIN is failing and not clearing the External Oscillator fault flag which is an indication of External oscillator failure. Microcontroller SW switched to internal clock. Trying to isolate if it is External oscillator or microcontroller is failing.

Question:

  1. What voltage level to be expected on XIN and XOUT? We are using 32.768KHz oscillator. So, I am expecting 32.786KHz into the microcontroller (XIN input).
  • Microcontroller part number is MSP430F2619SPM as shown below and powered by 2.9V
  • Crystal part number is CM7V-T1A32.768kHz9.0pf+/-20ppm (MFG: Micro crystal division of ETA).
  1. Are there any other suggestions to verify Y1 is bad? It is easier to replace crystal than microcontroller.

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