mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 235

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

15.4.2 Voltage Conversion
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
AIEN
INTERRUPT
INTERNAL
DATA BUS
LOGIC
COCO
NOTE:
READ DDRAx/DDRCx
WRITE DDRAx/DDRCx
WRITE PTAx/PTCx
READ PTAx/PTCx
CONVERSION
COMPLETE
BUS CLOCK
CGMXCLK
RESET
When the input voltage to the ADC equals V
signal to $3FF (full scale). If the input voltage equals V
converts it to $000. Input voltages between V
straight-line linear conversion. All other input voltages will result in $3FF
if greater than V
Input voltage should not exceed the analog supply voltages.
Figure 15-2. ADC Block Diagram
ADC DATA REGISTERS
ADIV[2:0]
Analog-to-Digital Converter (ADC)
DDRAx/DDRCx
ADRH0
PTAx/PTCx
GENERATOR
CLOCK
ADC
REFH
ADRL0
ADRL1
ADRL2
ADRL3
ADCICLK
ADICLK
and $000 if less than V
VOLTAGE IN
DISABLE
(V
ADC
ADIN
)
2-BIT UP-COUNTER
DISABLE
CHANNEL
ATD2–ATD12
(11 CHANNELS)
SELECT
Analog-to-Digital Converter (ADC)
MUX
REFH
REFL
REFH
ADCH[4:0]
, the ADC converts the
.
and V
Functional Description
REFL
REFL
FROM
ANALOG MODULE
, the ADC
AUTO[1:0]
ASCAN
PTAx/PTCx
is a
Data Sheet
OPOUT
OPIN1
OPIN2
V
V
REFH
REFL
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