s908gr16ag4cfj Freescale Semiconductor, Inc, s908gr16ag4cfj Datasheet - Page 47

• Manufacturer Part Number: s908gr16ag4cfj
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

3.3.2 Voltage Conversion
When the input voltage to the ADC equals V
input voltage equals V
straight-line linear conversion.
Freescale Semiconductor
INTERNAL
DATA BUS
The ADC input voltage must always be greater than V
V
pin, and connect the V
The V
AIEN
DDAD
INTERRUPT
LOGIC
DDAD
. Connect the V
COCO
READ DDRBx
WRITE DDRBx
WRITE PTBx
READ PTBx
REFL
,
pin should be routed carefully for maximum noise immunity.
CONVERSION
BUS CLOCK
COMPLETE
the ADC converts it to $000. Input voltages between V
RESET
CGMXCLK
MC68HC908GR16A Data Sheet, Rev. 1.0
Figure 3-2. ADC Block Diagram
SSAD
DDAD
ADIV2–ADIV0
ADC DATA REGISTER
pin to the same voltage potential as the V
pin to the same voltage potential as the V
GENERATOR
DDRBx
REFH
PTBx
CLOCK
ADC
ADC CLOCK
ADICLK
, the ADC converts the signal to $3FF (full scale). If the
NOTE
VOLTAGE IN
(V
ADC
ADIN
DISABLE
)
DISABLE
SSAD
CHANNEL
SELECT
and less than
ADC CHANNEL x
PTBx
ADCH4–ADCH0
REFH
SS
Functional Description
DD
pin.
and V
REFL
are a
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