MC68HC08AZ32A Datasheet, PDF (412/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Analog-to-Digital Converter (ADC-15)
23.2 Introduction
This section describes the analog-to-digital converter. The ADC is an 8-
bit analog-to-digital converter.
For further information regarding analog-to-digital converters on
Motorola microcontrollers, please consult the HC08 ADC Reference
Manual, ADCRM/AD.
23.3 Features
Features of the ADC module include:
• 15 Channels with Multiplexed Input
• Linear Successive Approximation
• 8-Bit Resolution
• Single or Continuous Conversion
• Conversion Complete Flag or Conversion Complete Interrupt
• Selectable ADC Clock
23.4 Functional Description
Fifteen ADC channels are available for sampling external sources at
pins PTD6/ATD14/TACLK–PTD0/ATD8 and PTB7/ATD7–PTB0/ATD0.
An analog multiplexer allows the single ADC converter to select one of
15 ADC channels as ADC voltage in (ADCVIN). ADCVIN is converted by
the successive approximation register-based counters. When the
conversion is completed, ADC places the result in the ADC data register
and sets a flag or generates an interrupt. See Figure 23-1.
Technical Data
412
MC68HC08AZ32A — Rev 1.0
Analog-to-Digital Converter (ADC-15)
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