Register 30: PWM0 Compare A (PWM0CMPA), offset 0x058
Register 31: PWM1 Compare A (PWM1CMPA), offset 0x098
Register 32: PWM2 Compare A (PWM2CMPA), offset 0x0D8
These registers contain a value to be compared against the counter (PWM0CMPA controls the
PWM generator 0 block, and so on). When this value matches the counter, a pulse is output which
can be configured to drive the generation of the pwmA and pwmB signals (via the PWMnGENA
and PWMnGENB registers) or drive an interrupt or ADC trigger (via the PWMnINTEN register). If
the value of this register is greater than the PWMnLOAD register (see page 875), then no pulse is
ever output.
If the comparator A update mode is locally synchronized (based on the CMPAUPDbit in the PWMnCTL
register), the 16-bit COMPA value is used the next time the counter reaches zero. If the update mode
is globally synchronized, it is used the next time the counter reaches zero after a synchronous
update has been requested through the PWM Master Control (PWMCTL) register (see page 842).
If this register is rewritten before the actual update occurs, the previous value is never used and is
lost.
PWM0 Compare A (PWM0CMPA)
PWM0 base: 0x4002.8000
Offset 0x058
Type R/W, reset 0x0000.0000
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
COMPA
R/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WR/WType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x00ROreserved31:16
Comparator A Value
The value to be compared against the counter.
0x00R/WCOMPA15:0
877July 24, 2012
Texas Instruments-Production Data
Stellaris
®
LM3S6G65 Microcontroller
OBSOLETE: TI has discontinued production of this device.
