LM3S3749 Datasheet, PDF (737/898 Pages) Texas Instruments – Stellaris® LM3S3749 Microcontroller

Stellaris® LM3S3749 Microcontroller
Figure 18-2. PWM Module Block Diagram
PWM Generator Block
Interrupts /
Triggers
Control
PWMnCTL
Timer
zero
load
dir
PWMnLOAD
PWMnCOUNT
PWM Clock
Comparators
PWMnCMPA
PWMnCMPB
cmp A
cmp B
Interrupt and
Trigger
Generator
PWMnINTEN
PWMnRIS
PWMnISC
Signal
Generator
PWMnGENA
PWMnGENB
Fault
PWMn_Fault
Dead-Band
Generator
PWMnDBCTL
PWMnDBRISE
PWMnDBFALL
PWMn_A
PWMn_B
18.2
Signal Description
Table 18-1 on page 737 lists the external signals of the PWM module and describes the function of
each. The PWM controller 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 PWM signals. The AFSEL bit in the GPIO Alternate Function Select
(GPIOAFSEL) register (page 384) should be set to choose the PWM function. For more information
on configuring GPIOs, see “General-Purpose Input/Outputs (GPIOs)” on page 361.
Table 18-1. PWM Signals (100LQFP)
Pin Name
Pin Number Pin Type Buffer Type^a Description
Fault0
17
I
TTL
PWM Fault 0.
Fault1
41
I
TTL
PWM Fault 1.
Fault2
16
I
TTL
PWM Fault 2.
Fault3
84
I
TTL
PWM Fault 3.
PWM0
47
O
TTL
PWM 0. This signal is controlled by PWM Generator 0.
PWM1
61
O
TTL
PWM 1. This signal is controlled by PWM Generator 0.
PWM2
86
O
TTL
PWM 2. This signal is controlled by PWM Generator 1.
PWM3
85
O
TTL
PWM 3. This signal is controlled by PWM Generator 1.
PWM4
60
O
TTL
PWM 4. This signal is controlled by PWM Generator 2.
PWM5
59
O
TTL
PWM 5. This signal is controlled by PWM Generator 2.
PWM6
37
O
TTL
PWM 6. This signal is controlled by PWM Generator 3.
PWM7
36
O
TTL
PWM 7. This signal is controlled by PWM Generator 3.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
November 17, 2011
737
Texas Instruments-Production Data