mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 302

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter
ATD0CTL4/ATD1CTL4 — ATD Control Register 4
Technical Data
302
RESET:
RES10
Bit 7
0
SMP1
6
0
The ATD control register 4 is used to select the clock source and set up
the prescaler. Writes to the ATD control registers initiate a new
conversion sequence. If a write occurs while a conversion is in progress,
the conversion is aborted and ATD activity halts until a write to
ATDxCTL5 occurs.
RES10 — 10 bit Mode
SMP1, SMP0 — Select Sample Time
Freescale Semiconductor, Inc.
Used to select one of four sample times after the buffered sample and
transfer has occurred.
For More Information On This Product,
0 = 8 bit operation
1 = 10 bit operation
SMP0
5
0
Analog-to-Digital Converter
Go to: www.freescale.com
Table 16-2. Final Sample Time Selection
SMP1
PRS4
0
0
1
1
4
0
SMP0
0
1
0
1
PRS3
3
0
16 A/D clock periods
Final Sample Time
2 A/D clock periods
4 A/D clock periods
PRS2
8 A/D clock periods
2
0
MC68HC912DG128 — Rev 3.0
PRS1
1
0
PRS0
Bit 0
1
$0064/$01E4
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