2.2.9 Window Monitor

The ADC module window monitor function can be used to automatically compare the conversion result against a preconfigured pair of upper and lower threshold values.

The threshold values are evaluated differently, depending on whether differential or single-ended mode is selected. In differential mode, the upper and lower thresholds are evaluated as signed values for the comparison, while in single-ended mode the comparisons are made as a set of unsigned values.

The significant bits of the lower window monitor threshold and upper window monitor threshold values are user-configurable, and follow the overall ADC sampling bit precision set when the ADC is configured by the user application. For example, only the eight lower bits of the window threshold values will be compared to the sampled data whilst the ADC is configured in 8-bit mode. In addition, if using differential mode, the 8^th bit will be considered as the sign bit even if bit 9 is zero.