The Set High Alert, Clear High Alert, Set Low Alert, and Clear Low Alert thresholds are each represented by a truncated 16 bit value, as illustrated Figure 8-26. The 7 MSBs from a relative humidity measurement are concatenated with the 9 MSBs from a temperature measurement. The actual temperature and relative humidity measurement result are always stored as a 16-bit value, but when compared against the programmed threshold values, due to the truncated representation, there is a resolution loss of 0.5°C in temperature and a 1% resolution loss in relative humidity.
The default values of the relative humidity and temperature thresholds after Power Up/Cycle, Hardware Reset, and Soft Reset are documented in Table 8-6 below. Refer to Table 8-3 for the appropriate command to re-program the thresholds.