s908gz60cfa Freescale Semiconductor, Inc, s908gz60cfa Datasheet - Page 66

• Manufacturer Part Number: s908gz60cfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC)
3.6 Low-Power Modes
The WAIT and STOP instruction can put the MCU in low power- consumption standby modes.
3.6.1 Wait Mode
The ADC continues normal operation during wait mode. Any enabled CPU interrupt request from the ADC
can bring the MCU out of wait mode. If the ADC is not required to bring the MCU out of wait mode, power
down the ADC by setting ADCH4–ADCH0 bits in the ADC status and control register before executing the
WAIT instruction.
3.6.2 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.
3.7 I/O Signals
The ADC module has eight pins shared with port A and the KBI module:
The ADC module has eight pins shared with port B:
The ADC module has eight pins shared with port G:
3.7.1 ADC Analog Power Pin (V
The ADC analog portion uses V
potential as V
V
3.7.2 ADC Analog Ground Pin (V
The ADC analog portion uses V
potential as V
V
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DDAD
SSAD
PTA7/KBD7/AD15–PTA0/KBD0/AD8
PTB7/AD7–PTB0/AD0
PTG7/AD23–PTG0/AD16
and V
and V
REFL
REFH
DD
SS
For maximum noise immunity, route V
capacitors as close as possible to the package.
.
. External filtering may be necessary to ensure clean V
are bonded internally.
are bonded internally.
MC68HC908GZ60 • MC68HC908GZ48 • MC68HC908GZ32 Data Sheet, Rev. 6
Route V
DDAD
SSAD
SSAD
DDAD
as its ground pin. Connect the V
as its power pin. Connect the V
SSAD
cleanly to avoid any offset errors.
)
)
NOTE
NOTE
DDAD
carefully and place bypass
DDAD
SSAD
DDAD
pin to the same voltage
pin to the same voltage
for good results.
Freescale Semiconductor