MC68HC705P9CDW FREESCALE [Freescale Semiconductor, Inc], MC68HC705P9CDW Datasheet - Page 131

• Manufacturer Part Number: MC68HC705P9CDW
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

11.4 Operation
11.4.1 Pin Functions
11.4.1.1 PC7/V
MC68HC705P9 — Rev. 4.0
MOTOROLA
Addr.
$001D
$001E
ADC Status/Control Register
RH
Name
ADC Data Register
See page 136.
See page 134.
The A/D conversion process is ratiometric, using two reference voltages,
V
V
The ADC uses five pins and shares them with port C:
The voltage reference high pin (PC7/V
voltage for the ratiometric conversion process. For ratiometric
conversion, the supply voltage of the analog source should be the same
as V
RH
DD
Figure 11-2. ADC I/O Register Summary
•
•
Freescale Semiconductor, Inc.
.
(ADSCR)
and V
RH
(ADDR)
For More Information On This Product,
PC7/V
PC6/AN0, PC5/AN1, PC4/AN2, and PC3/AN3
and be referenced to V
Analog-to-Digital Converter (ADC)
SS
Read:
Read:
Write:
Write:
Reset:
Reset:
. Conversion accuracy is guaranteed only if V
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RH
Bit 7
Bit 7
CCF
0
= Unimplemented
ADRC
6
6
0
SS
ADON
.
5
5
0
Unaffected by reset
RH
4
4
0
0
) supplies the high reference
Analog-to-Digital Converter (ADC)
3
3
0
0
CH2
2
2
0
RH
Technical Data
CH1
is equal to
1
1
0
Operation
Bit 0
Bit 0
CH0
0
131