MC68HC908LB8_05 Datasheet, PDF (51/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

I/O Registers
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 20.8 5.0-Volt ADC Characteristics.
Bus frequency
f_ADIC =
≅ 1 MHz
ADIV[2:0]
MC68HC908LB8 Data Sheet, Rev. 1
Freescale Semiconductor
51