MC68HC912D60A MOTOROLA [Motorola, Inc], MC68HC912D60A Datasheet - Page 351
MC68HC912D60A
Manufacturer Part Number
MC68HC912D60A
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC912D60A.pdf
(460 pages)
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18.3 Modes of Operation
MC68HC912D60A — Rev 3.0
MOTOROLA
Analog to digital conversions are performed in a variety of different
programmable sequences referred to as conversion modes. Each
conversion mode is defined by:
The modes are defined by the settings of three control bits (in ATDCTL5)
and three control values
Sequences are initiated or halted by writing to control registers
ATDCTL4 and ATDCTL5.
For the continuous sequence modes, conversions will not stop until
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Freescale Semiconductor, Inc.
For More Information On This Product,
How many A/D conversions (one, four or eight) are performed in
a sequence
Which analog input channels are examined during a sequence
The sample time length
Whether sequences are performed continuously or not
Result register assignments
MULT controls whether the sequence examines a single analog
input channel or scans a number of different channels
SCAN determines if sequences are performed continuously
SC determines if we are performing a special conversion i.e.
converting V
CC/CB/CA (in ATDCTL5) define the input channel(s) to be
examined
S8C/S1C (in ATDCTL3/5) define the number of conversions in a
sequence
SMP0/SMP1 (in ATDCTL4) define the length of the sample time.
Another non-continuous conversion sequence is initiated and
finishes
The ATD is powered down (ADPU control bit)
The ATD is reset
Analog-to-Digital Converter
Go to: www.freescale.com
RL
, V
RH
, (V
RL
+V
RH
)/2 (usually used for test purposes).
Analog-to-Digital Converter
Modes of Operation
Technical Data
351
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