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| MC68HC908GP32 Datasheet, PDF (94/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs) | |||
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Freescale Semiconductor, Inc.
Analog-to-Digital Converter (ADC)
5.7.1 ADC Analog Power Pin (VDDAD)/ADC Voltage Reference High Pin (VREFH)
The ADC analog portion uses VDDAD as its power pin. Connect the
VDDAD pin to the same voltage potential as VDD. External filtering may
be necessary to ensure clean VDDAD for good results.
NOTE: For maximum noise immunity, route VDDAD carefully and place bypass
capacitors as close as possible to the package.
5.7.2 ADC Analog Ground Pin (VSSAD)/ADC Voltage Reference Low Pin (VREFL)
The ADC analog portion uses VSSAD as its ground pin. Connect the
VSSAD pin to the same voltage potential as VSS.
NOTE: Route VSSAD cleanly to avoid any offset errors.
5.7.3 ADC Voltage In (VADIN)
VADIN is the input voltage signal from one of the eight ADC channels to
the ADC module.
5.8 I/O Registers
These I/O registers control and monitor ADC operation:
⢠ADC status and control register (ADSCR)
⢠ADC data register (ADR)
⢠ADC clock register (ADCLK)
Technical Data
92
MC68HC908GP32â¢MC68HC08GP32 â Rev. 6
Analog-to-Digital Converter (ADC)
For More Information On This Product,
Go to: www.freescale.com
MOTOROLA
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