Freescale Semiconductor, Inc.
Analog-to-Digital Converter
Bit 7
6
S8CM
0
5
SCAN
0
4
MULT
0
3
CD
0
2
CC
0
1
CB
0
Bit 0
CA
0
0
0
RESET:
ATD0CTL5/ATD1CTL5 — ATD Control Register 5
$0065/$01E5
The ATD control register 5 is used to select the conversion modes, the
conversion channel(s), and initiate conversions.
Read or write any time. Writes to the ATD control registers initiate a new
conversion sequence. If a conversion sequence is in progress when a
write occurs, that sequence is aborted and the SCF and CCF bits are
reset.
S8CM — Select 8 Channel Mode
0 = Conversion sequence consists of four conversions
1 = Conversion sequence consists of eight conversions
SCAN — Enable Continuous Channel Scan
0 = Single conversion sequence
1 = Continuous conversion sequences (scan mode)
When a conversion sequence is initiated by a write to the ATDxCTL
register, the user has a choice of performing a sequence of four (or
eight, depending on the S8CM bit) conversions or continuously
performing four (or eight) conversion sequences.
MULT — Enable Multichannel Conversion
0 = ATD sequencer runs all four or eight conversions on a single
input channel selected via the CD, CC, CB, and CA bits.
1 = ATD sequencer runs each of the four or eight conversions on
sequential channels in a specific group. Refer to Table 16-4.
Technical Data
MC68HC912DG128 — Rev 3.0
Analog-to-Digital Converter
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