Z8F4822AR020SG Datasheet, PDF (181/323 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F64xx Series
Product Specification
161
Analog-to-Digital Converter
The Analog-to-Digital Converter (ADC) converts an analog input signal to a 10-bit binary
number. The features of the sigma-delta ADC include:
• 12 analog input sources are multiplexed with general-purpose I/O ports
• Interrupt upon completion of conversion
• Internal voltage reference generator
• A Direct Memory Access (DMA) controller that can automatically initiate data conver-
sion and transfer the data from 1 to 12 analog inputs
Architecture
Figure 34 displays the three major functional blocks (converter, analog multiplexer, and
voltage reference generator) of the ADC. The ADC converts an analog input signal to its
digital representation. The 12-input analog multiplexer selects one of the 12 analog input
sources. The ADC requires an input reference voltage for the conversion. The voltage ref-
erence for the conversion may be input through the external V_REF pin or generated inter-
nally by the voltage reference generator.
PS019924-0113
PRELIMINARY
Analog-to-Digital Converter