MC68HC05T16 Datasheet, PDF (89/128 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

10
ANALOG TO DIGITAL CONVERTER
The Analog-to-Digital Converter (ADC) system consists of two analog input channels and a single
5-bit D/A Converter and Comparator, with continuous conversion. A result flag indicates if the
comparator output is above or below the analog Input. ADC is disabled by setting AD4 to AD0 bits
of ADC Control/Status register to all 1’s. This disable function is mainly for low power applications.
Figure 10-1 shows a block diagram of the ADC module.
RESULT
–
+
V_DD
2R
R
2R
R
2R
R
2R
R
2R
2R
ADCIN0 or ADCIN1
AD4
AD3
AD2
AD1
AD0
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Figure 10-1 ADC Block Diagram
MC68HC05T16
ANALOG TO DIGITAL CONVERTER
TPG
MOTOROLA
10-1