MC68HC705P9 Datasheet, PDF (122/156 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Introduction
ADC _Introduction
The ADC consists of a single successive-approximation A/D converter,
an input multiplexer to select one of four external or two internal
channels, and control circuitry. Figure 1 shows the structure of the ADC
module.
AN3
COMPARATOR
AN2
INPUT
AN1
MULTIPLEXER
AN1
CH2
CH1
CH0
V_RH
V_SS
DIGITAL-
TO-ANALOG
CONVERTER
CCF
ADON
INTERNAL CLOCK
(XTAL ÷ 2)
CONTROL
LOGIC
ADRC
INTERNAL
RC
OSCILLATOR
Figure 1. ADC Block Diagram
2-atd4x8nvrl
122
ADC
MOTOROLA