MC9S08QD4 Datasheet, PDF (100/202 Pages) Freescale Semiconductor, Inc – Microcontrollers

Analog-to-Digital Converter (S08ADC10V1)
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3
ADCSC1
ADCCFG
MCU STOP
ADHWT
AD0
AD27
12
ADCK _Clock
Control Sequencer
Divide
Async
Clock Gen
ADACK
÷2
Bus Clock
ALTCLK
ADVIN
SAR Converter
AIEN 1
COCO 2
Interrupt
V_REFH
V_REFL
Data Registers
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3
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Logic
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ADCSC2
Figure 8-2. ADC Block Diagram
8.2 External Signal Description
The ADC module supports up to 28 separate analog inputs. It also requires four supply/reference/ground
connections.
Table 8-2. Signal Properties
Name
AD27–AD0
V_REFH
V_REFL
V_DDAD
V_SSAD
Function
Analog Channel inputs
High reference voltage
Low reference voltage
Analog power supply
Analog ground
MC9S08QD4 Series MCU Data Sheet, Rev. 3
100
Freescale Semiconductor