Datasheet

Analog-to-Digital Converter (ADC)
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
46 Freescale Semiconductor
The ADC requires a clock rate of approximately 1 MHz for correct operation. If the selected clock
source is not fast enough, the ADC will generate incorrect conversions. See 17.9 Trimmed Accuracy
of the Internal Clock Generator.
NOTE
During the conversion process, changing the ADC clock will result in an
incorrect conversion.
f
CGMXCLK
or bus frequency
f
ADIC
= ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ ≅ 1 MHz
ADIV[2:0]