s908ey8ad4cfjer Freescale Semiconductor, Inc, s908ey8ad4cfjer Datasheet - Page 48

• Manufacturer Part Number: s908ey8ad4cfjer
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC) Module
3.5 Wait Mode
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.
3.6 I/O Signals
The ADC module has eight input signals.
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 Pin (V
V
voltage potential as
Specifications.
3.6.4 ADC Voltage Reference Low Pin (V
V
V
3.6.5 ADC Voltage In (ADVIN)
ADVIN is the input voltage signal from one of the 8 ADC channels to the ADC module.
3.6.6 ADC External Connections
This section describes the ADC external connections: V
48
REFH
REFL
SSA
DD
SS
. A finite current will be associated with V
is the lower reference supply for the ADC. Connect the V
.
. External filtering may be necessary to ensure clean V
is the power supply for setting the reference voltage V
Route V
capacitors as close as possible to the package.
Route V
capacitors as close as possible to the package.
V
DDA
DDA
REFH
. There will be a finite current associated with V
carefully for maximum noise immunity and place bypass
MC68HC908EY16 • MC68HC908EY8 Data Sheet, Rev. 10
carefully for maximum noise immunity and place bypass
SSA
DDA
as its ground pin. Connect the V
as its power pin. Connect the V
DDA
SSA
)
REFH
)
REFL
)
REFL
NOTE
NOTE
. See
)
REFH
Chapter 20 Electrical
REFH
and V
DDA
REFL
. Connect the V
for good results.
DDA
SSA
REFL
pin to the same voltage potential as
pin to the same voltage potential
pin to the same voltage potential
REFH
, ANx, and grounding.
. See
Specifications.
REFH
Chapter 20 Electrical
Freescale Semiconductor
pin to the same