MC68HC908GT16_07 FREESCALE [Freescale Semiconductor, Inc], MC68HC908GT16_07 Datasheet - Page 53

• Manufacturer Part Number: MC68HC908GT16_07
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

3.5.2 Stop Mode
The ADC module is inactive after the execution of a STOP instruction. Any pending conversion is aborted.
ADC conversions resume when the MCU exits stop mode after an external interrupt. Allow one
conversion cycle to stabilize the analog circuitry.
3.6 I/O Signals
The ADC module has eight pins shared with port B, PTB7/AD7–PTB0/AD0.
3.6.1 ADC Analog Power Pin (V
The ADC analog portion uses V
as V
3.6.2 ADC Analog Ground Pin (V
The ADC analog portion uses V
as V
3.6.3 ADC Voltage Reference High Pin (V
The ADC analog portion uses V
to the same voltage potential as V
good results. Any noise present on this pin will be reflected and possibly magnified in A/D conversion
values.
3.6.4 ADC Voltage Reference Low Pin (V
The ADC analog portion uses V
to the same voltage potential as V
good results. Any noise present on this pin will be reflected and possibly magnified in A/D conversion
values.
Freescale Semiconductor
DD
SS
.
. External filtering may be necessary to ensure clean V
For maximum noise immunity, route V
capacitors as close as possible to the package.
Route V
For maximum noise immunity, route V
capacitors as close as possible to the package. Routing V
parallel to V
For maximum noise immunity, route V
to V
Routing V
noise rejection.
SS
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
, place bypass capacitors as close as possible to the package.
SSA
REFH
REFL
cleanly to avoid any offset errors.
close and parallel to V
REFH
REFL
SSA
DDA
may improve common mode noise rejection.
DDA
SSA
as its ground pin. Connect the V
as its power pin. Connect the V
as its upper voltage reference pin. The V
as its lower voltage reference pin. The V
DDA
. External filtering is often necessary to ensure a clean V
. External filtering is often necessary to ensure a clean V
SSA
)
)
REFL
REFH
NOTE
NOTE
NOTE
NOTE
REFL
DDA
REFH
)
REFL
)
carefully and place bypass
may improve common mode
carefully and, if not connected
carefully and place bypass
DDA
for good results.
DDA
SSA
pin to the same voltage potential
pin to the same voltage potential
REFH
REFH
REFL
close and
pin must be connected
pin must be connected
I/O Signals
REFL
REFH
for
for
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