mc68hc908mr8 Freescale Semiconductor, Inc, mc68hc908mr8 Datasheet - Page 317

• Manufacturer Part Number: mc68hc908mr8
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

18.6 Wait Mode
18.7 Stop Mode
18.8 I/O Signals
18.8.1 ADC Voltage Reference Pin (V
MC68HC908MR8 — Rev 4.1
Freescale Semiconductor
NOTE:
The WAIT instruction can put the MCU in low power-consumption
standby 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 ADCH[4:0] in the ADC status and control
register before executing the WAIT instruction.
The STOP instruction can put the MCU in low power-consumption
standby mode.
The ADC module becomes 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 after exiting stop
mode.
The ADC module has seven input signals that are shared with port A.
V
V
current associated with V
Route V
capacitors as close as possible to the package.
REFH
REFH
is the power supply for setting the reference voltage. Connect the
pin to the same voltage potential as V
REFH
Analog-to-Digital Converter (ADC)
carefully for maximum noise immunity and place bypass
REFH
)
REFH
.
Analog-to-Digital Converter (ADC)
DDA
. There will be a finite
Technical Data
Wait Mode
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