Analog To Digital Converter - Motorola MC68HC05T16 Technical Data Manual

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
MC68HC05T16
10
–
+
R
R
R
R
V
DD
2R
Figure 10-1 ADC Block Diagram
ANALOG TO DIGITAL CONVERTER
ADCIN0 or ADCIN1
2R
AD4
2R
AD3
2R
AD2
2R
AD1
2R
AD0
10
TPG
MOTOROLA
10-1