MC68HC08AZ16 Datasheet, PDF (490/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Appendix C: ADC-15
Functional Description
Functional Description
Fifteen ADC channels are available for sampling external sources at
pins PTD6/TACLK–PTD0 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 1.
INTERNAL
DATA BUS
READ DDRB/DDRB
WRITE DDRB/DDRD
RESET
WRITE PTB/PTD
READ PTB/PTD
DDRBx/DDRDx
PTBx/PTDx
ADC DATA REGISTER
DISABLE
PTBx/PTDx
ADC CHANNEL x
DISABLE
CONVERSION
INTERRUPT ^COMPLETE
LOGIC
AIEN
COCO
CGMXCLK
BUS CLOCK
ADC VOLTAGE IN
ADC
ADCVIN
ADCH[4:0]
CHANNEL
SELECT
ADC CLOCK
CLOCK
GENERATOR
ADIV[2:0] ADICLK
Figure 1. ADC-15 Block Diagram
3-adc15
MOTOROLA
Appendix C: ADC-15
MC68HC08AZ32
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