S9S08SG8E2MSC Datasheet, PDF (128/320 Pages) Freescale Semiconductor, Inc – MC9S08SG8 MC9S08SG4 Data Sheet Addendum

Analog-to-Digital Converter (S08ADCV1)
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3
ADCSC1
ADCCFG
MCU STOP
ADHWT
AD0
AD27
12
ADCK _Clock
Control Sequencer
Divide
Async
Clock Gen
ADACK

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 9-2. ADC Block Diagram
9.2 External Signal Description
The ADC module supports up to 28 separate analog inputs. It also requires four supply/reference/ground
connections.
Table 9-2. 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
MC9S08SG8 MCU Series Data Sheet, Rev. 7
124
Freescale Semiconductor