LM3S101_0610 Datasheet, PDF (263/300 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S101 Data Sheet
13.2.1
Table 13-2. Comparator 1 Operating Modes
ACCNTL1
Comparator 1
ASRCP
VIN-
VIN+
Output
11
C0o/C1-
reserved
n/a
a. C0o and C1- signals share a single pin and may only be used as one or the other.
Interrupt
yes
Internal Reference Programming
The structure of the internal reference is shown in Figure 13-3. This is controlled by a single
configuration register (ACREFCTL). Table 13-3 shows the programming options to develop
specific internal reference values, to compare an external voltage against a particular voltage
generated internally.
Figure 13-3. Comparator Internal Reference Structure
AVDD
8R R
R
8R
R
R
•••
EN
VREF
RNG
15 14
•••
1
0
Decoder
internal
reference
Table 13-3. Internal Reference Voltage and ACREFCTL Field Values
ACREFCTL Register
EN Bit Value RNG Bit Value
Output Reference Voltage Based on VREF Field Value
EN=0
RNG=X
0 V (GND) for any value of VREF; however, it is recommended that
RNG=1 and VREF=0 for the least noisy ground reference.
October 5, 2006
263
Preliminary