TM4C129XNCZAD Datasheet, PDF (1913/2191 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C129XNCZAD Microcontroller
27.1 Block Diagram
Figure 27-1. Analog Comparator Module Block Diagram
C2-
-ve input _{Comparator 2}
C2+
+ve input
output
C2o
+ve input (alternate)
ACCTL2
trigger
ACSTAT2
interrupt
reference input
trigger
C1-
-ve input _{Comparator 1}
C1+
+ve input
output
C1o
+ve input (alternate)
ACCTL1
trigger
trigger
ACSTAT1
interrupt
reference input
C0-
-ve input _{Comparator 0}
C0+
+ve input
output
C0o
+ve input (alternate)
ACCTL0
trigger
ACSTAT0
interrupt
reference input
trigger
Internal
Bus
Voltage
Ref
ACREFCTL
Module
Status
ACMPPP
Interrupt Control
ACRIS
ACMIS
ACINTEN
Interrupt
27.2
Note:
This block diagram depicts the maximum number of analog comparators and comparator outputs
for the family of microcontrollers; the number for this specific device may vary. See page 1926 for
what is included on this device.
Signal Description
The following table lists the external signals of the Analog Comparators and describes the function
of each. The Analog Comparator output signals are alternate functions for some GPIO signals and
default to be GPIO signals at reset. The column in the table below titled "Pin Mux/Pin Assignment"
lists the possible GPIO pin placements for the Analog Comparator signals. The AFSEL bit in the
GPIO Alternate Function Select (GPIOAFSEL) register (page 806) should be set to choose the
Analog Comparator function. The number in parentheses is the encoding that must be programmed
into the PMCn field in the GPIO Port Control (GPIOPCTL) register (page 823) to assign the Analog
Comparator signal to the specified GPIO port pin. The positive and negative input signals are
configured by clearing the DEN bit in the GPIO Digital Enable (GPIODEN) register. For more
information on configuring GPIOs, see “General-Purpose Input/Outputs (GPIOs)” on page 775.
Table 27-1. Analog Comparators Signals (212BGA)
Pin Name
C0+
Pin Number Pin Mux / Pin
Assignment
L2
PC6
Pin Type
I
Buffer Type Description
Analog Analog comparator 0 positive input.
June 18, 2014
Texas Instruments-Production Data
1913