LM3S1620 Luminary Micro, Inc, LM3S1620 Datasheet - Page 380
![no-image](/images/no-image-200.jpg)
LM3S1620
Manufacturer Part Number
LM3S1620
Description
Lm3s1620 Arm Microcontroller
Manufacturer
Luminary Micro, Inc
Datasheet
1.LM3S1620.pdf
(512 pages)
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Analog Comparators
15.2.1
380
Table 15-3. Comparator 2 Operating Modes
Internal Reference Programming
The structure of the internal reference is shown in Figure 15-3 on page 380. This is controlled by a
single configuration register (ACREFCTL). Table 15-4 on page 380 shows the programming options
to develop specific internal reference values, to compare an external voltage against a particular
voltage generated internally.
Figure 15-3. Comparator Internal Reference Structure
VREF
Table 15-4. Internal Reference Voltage and ACREFCTL Field Values
ACCNTL2
ASRCP
00
01
10
11
ACREFCTL Register
EN Bit Value
RNG
EN
EN=0
Comparator 2
VIN-
C2-
C2-
C2-
C2-
AVDD
RNG Bit Value
VIN+
reserved
RNG=X
C2+
C0+
Vref
8R
Output
n/a
n/a
n/a
n/a
Output Reference Voltage Based on VREF Field Value
0 V (GND) for any value of VREF; however, it is recommended that RNG=1 and VREF=0
for the least noisy ground reference.
15
Interrupt
R
yes
yes
yes
yes
14
Preliminary
Decoder
R
1
R
0
8R
internal
reference
July 26, 2008
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