LM3S101 Datasheet, PDF (242/445 Pages) List of Unclassifed Manufacturers – Microcontroller

General-Purpose Timers
Figure 8-1. GPTM Module Block Diagram
Interrupt / Config
TimerA
Interrupt
TimerB
Interrupt
GPTMCFG
GPTMCTL
GPTMIMR
GPTMRIS
GPTMMIS
GPTMICR
TimerA Control
GPTMTAPMR
GPTMTAPR
GPTMTAMATCHR
GPTMTAILR
GPTMTAMR
TimerB Control
GPTMTBPMR
GPTMTBPR
GPTMTBMATCHR
GPTMTBILR
GPTMTBMR
0x0000 (Down Counter Modes)
TA Comparator
GPTMAR En
GPTMTBR En
TB Comparator
Clock / Edge
Detect
32 KHz or
Even CCP Pin
RTC Divider
System
Clock
0x0000 (Down Counter Modes)
Table 8-1. Available CCP Pins
Timer
Timer 0
Timer 1
16-Bit Up/Down Counter
TimerA
TimerB
TimerA
TimerB
Even CCP Pin
CCP0
-
-
-
Odd CCP Pin
-
-
-
-
8.2 Signal Description
Table 8-2 on page 242 and Table 8-3 on page 243list the external signals of the GP Timer module
and describe the function of each. The GP Timer signals are alternate functions for some GPIO
signals and default to be GPIO signals at reset. The column in the table below titled "Pin Assignment"
lists the possible GPIO pin placements for these GP Timer signals. The AFSEL bit in the GPIO
Alternate Function Select (GPIOAFSEL) register (page 219) should be set to choose the GP Timer
function. For more information on configuring GPIOs, see “General-Purpose Input/Outputs
(GPIOs)” on page 199.
Table 8-2. General-Purpose Timers Signals (28SOIC)
Pin Name
Pin Number Pin Type Buffer Type^a Description
32KHz
20
I
TTL
32-KHz input to the timer.
CCP0
19
I/O
TTL
Capture/Compare/PWM 0.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
242
July 14, 2014
Texas Instruments-Production Data