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MC908AS60ACFU Datasheet, PDF (327/414 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers | |||
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Chapter 26
Analog-to-Digital Converter (ADC)
26.1 Introduction
This section describes the analog-to-digital converter (ADC-15). The ADC is an 8-bit analog-to-digital
converter.
For further information regarding analog-to-digital converters on Freescale microcontrollers, please
consult the HC08 ADC Reference Manual, ADCRM/AD.
26.2 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
26.3 Functional Description
Fifteen ADC channels are available for sampling external sources at pins
PTD6/ATD14/TACLKâPTD0/ATD8 and PTB7/ATD7âPTB0/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 26-1.
MC68HC908AZ60A ⢠MC68HC908AS60A ⢠MC68HC908AS60E Data Sheet, Rev. 6
Freescale Semiconductor
327
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