MC68HC08AZ0 Datasheet, PDF (314/444 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Analog-to-Digital Converter (ADC)
I/O signals
The ADC module has 8 I/O that are shared with Port B.
ADC analog
power pin
(V_DDAREF)
NOTE:
The ADC analog portion uses as its power pin. Connect the V_DDAREF pin
to the same voltage potential as V_DD. External filtering may be necessary
to ensure clean V_DDAREF for good results.
Route V_DDAREF carefully for maximum noise immunity and place bypass
capacitors as close as possible to the package. V_DDAREF must be
present for operation of he ADC.
ADC analog
ground pin
(A_VSS/VREFL)
ADC voltage
reference pin
(VREFH)
The ADC analog portion uses A_VSS/VREFL as its ground pin. Connect
the A_VSS/VREFL pin to the same voltage potential as V_SS.
VREFH is the reference voltage for the ADC.
ADC voltage in
(ADVIN)
ADVIN is the input voltage signal from one of the 8 ADC channels to the
ADC module.
MC68HC08AZ0
312
Analog-to-Digital Converter (ADC)
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Go to: www.freescale.com
6-adc
MOTOROLA