LM3S611 Datasheet, PDF (489/579 Pages) List of Unclassifed Manufacturers – Microcontroller

Stellaris^® LM3S611 Microcontroller
period. Use this value to set the PWM0LOAD register. In Count-Down mode, set the Load field
in the PWM0LOAD register to the requested period minus one.
■ Write the PWM0LOAD register with a value of 0x0000.018F.
6. Set the pulse width of the PWM0 pin for a 25% duty cycle.
■ Write the PWM0CMPA register with a value of 0x0000.012B.
7. Set the pulse width of the PWM1 pin for a 75% duty cycle.
■ Write the PWM0CMPB register with a value of 0x0000.0063.
8. Start the timers in PWM generator 0.
■ Write the PWM0CTL register with a value of 0x0000.0001.
9. Enable PWM outputs.
■ Write the PWMENABLE register with a value of 0x0000.0003.
14.5
Register Map
Table 14-2 on page 489 lists the PWM registers. The offset listed is a hexadecimal increment to the
register’s address, relative to the PWM base address of 0x4002.8000. Note that the PWM module
clock must be enabled before the registers can be programmed (see page 191). There must be a
delay of 3 system clocks after the PWM module clock is enabled before any PWM module registers
are accessed.
Table 14-2. PWM Register Map
Offset Name
Type
0x000 PWMCTL
0x004 PWMSYNC
0x008 PWMENABLE
0x00C PWMINVERT
0x010 PWMFAULT
0x014 PWMINTEN
0x018 PWMRIS
0x01C PWMISC
0x020 PWMSTATUS
0x040 PWM0CTL
0x044 PWM0INTEN
0x048 PWM0RIS
0x04C PWM0ISC
0x050 PWM0LOAD
R/W
R/W
R/W
R/W
R/W
R/W
RO
R/W1C
RO
R/W
R/W
RO
R/W1C
R/W
Reset
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
0x0000.0000
Description
PWM Master Control
PWM Time Base Sync
PWM Output Enable
PWM Output Inversion
PWM Output Fault
PWM Interrupt Enable
PWM Raw Interrupt Status
PWM Interrupt Status and Clear
PWM Status
PWM0 Control
PWM0 Interrupt and Trigger Enable
PWM0 Raw Interrupt Status
PWM0 Interrupt Status and Clear
PWM0 Load
See
page
492
493
494
495
496
497
498
499
500
501
503
506
507
508
July 14, 2014
489
Texas Instruments-Production Data