LM3S5G51 Datasheet, PDF (479/1266 Pages) Texas Instruments – Stellaris® LM3S5G51 Microcontroller

Figure 10-1. GPTM Module Block Diagram
Timer A
Free-Running
Value
Interrupt / Config
Timer A
Interrupt
Timer B
Interrupt
GPTMCFG
GPTMCTL
GPTMIMR
GPTMRIS
GPTMMIS
GPTMICR
Timer B
Free-Running
Value
System
Clock
Timer A Control
GPTMTAPMR
GPTMTAPR
GPTMTAMATCHR
GPTMTAILR
GPTMTAMR
Timer B Control
GPTMTBMR
GPTMTBILR
GPTMTBMATCHR
GPTMTBPR
GPTMTBPMR
Stellaris^® LM3S5G51 Microcontroller
0x0000 (Down Counter Modes)
0xFFFF (Up Counter Modes)
TA Comparator
GPTMTAR En
GPTMTAV
GPTMTBV
GPTMTBR En
TB Comparator
Clock / Edge
Detect
32 KHz or
Even CCP Pin
RTC Divider
Clock / Edge
Detect
Odd CCP Pin
0x0000 (Down Counter Modes)
0xFFFF (Up Counter Modes)
10.2
Table 10-1. Available CCP Pins
Timer
Timer 0
Timer 1
Timer 2
Timer 3
16-Bit Up/Down Counter
TimerA
TimerB
TimerA
TimerB
TimerA
TimerB
TimerA
TimerB
Even CCP Pin
CCP0
-
CCP2
-
CCP4
-
CCP6
-
Odd CCP Pin
-
CCP1
-
CCP3
-
CCP5
-
CCP7
Signal Description
The following table lists the external signals of the GP Timer module and describes 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 Mux/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 446) should be set to choose the GP Timer function. The number
in parentheses is the encoding that must be programmed into the PMCn field in the GPIO Port
Control (GPIOPCTL) register (page 464) to assign the GP Timer signal to the specified GPIO port
pin. For more information on configuring GPIOs, see “General-Purpose Input/Outputs
(GPIOs)” on page 422.
January 23, 2012
479
Texas Instruments-Production Data