LM3S2110 Datasheet, PDF (389/485 Pages) List of Unclassifed Manufacturers – Microcontroller

LM3S2110 Microcontroller
15.1
15.2
Block Diagram
Figure 15-1. Analog Comparator Module Block Diagram
C2-
-ve input _{Comparator 2}
C2+
+ve input
output
+ve input (alternate)
ACCTL2
ACSTAT2
interrupt
reference input
<none>
interrupt
C1-
-ve input _{Comparator 1}
C1+
+ve input
output
<none>
+ve input (alternate)
ACCTL1
ACSTAT1
interrupt
reference input
interrupt
C0-
-ve input _{Comparator 0}
C0+
+ve input
output
C0o
+ve input (alternate)
ACCTL0
ACSTAT0
interrupt
reference input
interrupt
Voltage
Ref
internal
bus
ACREFCTL
Functional Description
Important: It is recommended that the Digital-Input enable (the GPIODEN bit in the GPIO module)
for the analog input pin be disabled to prevent excessive current draw from the I/O
pads.
The comparator compares the VIN- and VIN+ inputs to produce an output, VOUT.
VIN- < VIN+, VOUT = 1
VIN- > VIN+, VOUT = 0
As shown in Figure 15-2 on page 390, the input source for VIN- is an external input. In addition to
an external input, input sources for VIN+ can be the +ve input of comparator 0 or an internal reference.
November 29, 2007
389
Preliminary