MC912DG128A Motorola, MC912DG128A Datasheet - Page 319

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

ATD0CTL5/ATD1CTL5 — ATD Control Register 5
9-atd
MOTOROLA
RESET:
Bit 7
0
0
S8CM
6
0
S8C — Conversion Sequence Length (Most Significant Bit)
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.
The S8C/S1C bits define the length of a conversion sequence.
Table 52
The result register assignments made to a conversion sequence
follow a few simple rules. Normally, the first result is placed in the first
register; the second result is placed in the second register, and so on.
Table 53
conversion lengths that are normally made. If FIFO mode is used, the
result register assignments differ. The results are placed in
consecutive registers between conversion sequences; the result
register mapping wraps around when the end of the register file is
reached.
SCAN
5
0
Analog-To-Digital Converter (ATD)
Table 52 Conversion Sequence Length Coding.
lists the coding combinations implemented.
presents the result register assignments for the various
S8C
0
0
1
MULT
4
0
S1C
X
0
1
CD
3
0
Number of Conversions per
CC
2
0
Sequence
Analog-To-Digital Converter (ATD)
4
1
8
MC68HC912DT128A Rev 2.0
CB
1
0
Bit 0
CA
0
ATD Registers
$0065/$01E5
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