To display degrees C, the Up/Down counter is preset to 0 degrees during the integrate
input state. During the integrate reference state, the counter counts up at a fixed clock rate
until zero-crossing. The clock rate and reference voltages are such that the display
corresponds to the temperature of the sensor (e.g. 5000 counts equal 50.00 degree C for
0.01 degree resolution, 2500 counts equals 250.0 degree C for 0.1 degree resolution).
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