Fail-Safe Clock Monitor (FSCM)

The Fail-Safe Clock Monitor (FSCM) allows the device to continue operating if the external oscillator fails. The FSCM is applicable to all external Oscillator modes. The FSCM is enabled by setting the Fail-Safe Clock Monitor Enable (FCMEN) Configuration bit.

The figure below shows the FSCM block diagram.

Figure 1. FSCM Block Diagram