s908ab32ag0cfue Freescale Semiconductor, Inc, s908ab32ag0cfue Datasheet - Page 234

• Manufacturer Part Number: s908ab32ag0cfue
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC)
14.7.1 ADC Analog Power Pin (V
14.7.2 ADC Analog Ground Pin (A
14.7.3 ADC Voltage Reference High Pin (V
14.7.4 ADC Voltage In (V
14.8 I/O Registers
Technical Data
234
NOTE:
NOTE:
The ADC analog portion uses V
V
be necessary to ensure clean V
For maximum noise immunity, route V
bypass capacitors as close as possible to the package.
The ADC analog portion uses A
A
Route A
V
V
the ADC module.
These I/O registers control and monitor ADC operation:
DDAREF
VSS
REFH
ADIN
•
•
•
ADIN
/V
ADC status and control register (ADSCR)
ADC data register (ADR)
ADC clock register (ADCLK)
is the input voltage signal from one of the eight ADC channels to
is the reference voltage for the ADC.
REFL
VSS
)
pin to the same voltage potential as V
Analog-to-Digital Converter (ADC)
DDAREF
/V
pin to the same voltage potential as V
VSS
REFL
/V
)
REFL
cleanly to avoid any offset errors.
REFH
)
)
VSS
DDAREF
DDAREF
/V
REFL
DDAREF
for good results.
as its power pin. Connect the
as its ground pin. Connect the
carefully and place
DD
MC68HC908AB32
. External filtering may
Freescale Semiconductor
SS
.
—
Rev. 1.1