MC9S08SH8 Datasheet, PDF (123/330 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 9 Analog-to-Digital Converter (S08ADCV1)
Calibration at 3 points, -40°C, 25°C, and 125°C will improve accuracy to ± 2.5°C. Once calibration has
been completed, the user will need to calculate the slope for both hot and cold. In application code, the
user would then calculate the temperature using Equation 9-1 as detailed above and then determine if the
temperature is above or below 25°C. Once determined if the temperature is above or below 25°C, the user
can recalculate the temperature using the hot or cold slope value obtained during calibration.
Figure 9-1 shows the MC9S08SH8 with the ADC module highlighted.
MC9S08SH8 MCU Series Data Sheet, Rev. 1
Freescale Semiconductor
123