mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 271
mc9s12xs128
Manufacturer Part Number
mc9s12xs128
Description
Hcs12 Microcontrollers 16-bit Automotive Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC9S12XS128.pdf
(738 pages)
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10.1.2
10.1.2.1
There is software programmable selection between performing single or continuous conversion on a
single channel or multiple channels.
10.1.2.2
Freescale Semiconductor
•
•
•
Stop Mode
— ICLKSTP=0 (in ATDCTL2 register)
— ICLKSTP=1 (in ATDCTL2 register)
Wait Mode
ADC12B16C behaves same in Run and Wait Mode. For reduced power consumption continuos
conversions should be aborted before entering Wait mode.
Freeze Mode
In Freeze Mode the ADC12B16C will either continue or finish or stop converting according to the
FRZ1 and FRZ0 bits. This is useful for debugging and emulation.
Entering Stop Mode aborts any conversion sequence in progress and if a sequence was aborted
restarts it after exiting stop mode. This has the same effect/consequences as starting a
conversion sequence with write to ATDCTL5. So after exiting from stop mode with a
previously aborted sequence all flags are cleared etc.
A/D conversion sequence seamless continues in Stop Mode based on the internally generated
clock ICLK as ATD clock. For conversions during transition from Run to Stop Mode or vice
versa the result is not written to the results register, no CCF flag is set and no compare is done.
When converting in Stop Mode (ICLKSTP=1) an ATD Stop Recovery time
required to switch back to bus clock based ATDCLK when leaving Stop Mode. Do not access
ATD registers during
Modes of Operation
Conversion Modes
MCU Operating Modes
this time
S12XS Family Reference Manual, Rev. 1.10
.
Analog-to-Digital Converter (ADC12B16CV1)
t
ATDSTPRCV
is
271
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