MC68HC08AS32 Datasheet, PDF (45/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Data Sheet — MC68HC08AS32
Section 3. Analog-to-Digital Converter (ADC)
3.1 Introduction
This section describes the 8-bit analog-to-digital converter (ADC).
3.2 Features
Features of the ADC module include:
• 15 channels (52-PLCC) with multiplexed input
• Linear successive approximation
• 8-bit resolution
• Single or continuous conversion
• Conversion complete flag or conversion complete interrupt
• Selectable ADC clock
3.3 Functional Description
Fifteen ADC channels are available for sampling external sources at pins
PTD6/ATD14/TCLK–PTD0/ATD8 and PTB7/ATD7–PTB0/ATD0. An analog
multiplexer allows the single ADC converter to select one of the 15 ADC channels
as ADC voltage input (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 3-2.)
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
45