LM3S1621 Datasheet, PDF (611/947 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Stellaris^® LM3S1621 Microcontroller
Mid-Band Operation
To operate in the mid-band region, either the CIC field field in the ADCDCCTLn register must be
programmed to 0x1. This setting causes interrupts or triggers to be generated in the mid-band region
according the operation mode. Only the Always and Once operational modes are available in the
mid-band region. An example of the state of the interrupt/trigger signal in the mid-band region for
each of the allowed operational modes is shown in Figure 13-12 on page 611. Note that a "0" in a
column following the operational mode name (Always or Once) indicates that the interrupt or trigger
signal is de-asserted and a "1" indicates that the signal is asserted.
Figure 13-12. Mid-Band Operation (CIC=0x1)
COMP1
COMP0
Always – 0 0 1 1 0 0 0 1 1 1 0 0 1 1 0 0
Once – 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0
Hysteresis Always – - - - - - - - - - - - - - - - -
Hysteresis Once – - - - - - - - - - - - - - - - -
High-Band Operation
To operate in the high-band region, either the CIC field field in the ADCDCCTLn register must be
programmed to 0x3. This setting causes interrupts or triggers to be generated in the high-band
region according the operation mode. An example of the state of the interrupt/trigger signal in the
high-band region for each of the allowed operational modes is shown in Figure 13-13 on page 612.
Note that a "0" in a column following the operational mode name (Always, Once, Hysteresis Always,
and Hysteresis Once) indicates that the interrupt or trigger signal is de-asserted and a "1" indicates
that the signal is asserted.
January 21, 2012
611
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