LM3S3768 Luminary Micro, Inc, LM3S3768 Datasheet - Page 642

• Manufacturer Part Number: LM3S3768
• Description: Lm3s3768 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
Pulse Width Modulator (PWM)
PWM0 Compare A (PWM0CMPA)
Base 0x4002.8000
Offset 0x058
Type R/W, reset 0x0000.0000
642
Bit/Field
31:16
15:0
R/W
RO
31
15
0
0
R/W
RO
Register 35: PWM0 Compare A (PWM0CMPA), offset 0x058
Register 36: PWM1 Compare A (PWM1CMPA), offset 0x098
Register 37: PWM2 Compare A (PWM2CMPA), offset 0x0D8
Register 38: PWM3 Compare A (PWM3CMPA), offset 0x118
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; this
can drive the generation of a PWM signal (via the PWMnGENA/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 640), then no pulse is ever output.
If the comparator A update mode is immediate (based on the CmpAUpd bit in the PWMnCTL register),
this 16-bit CompA value is used the next time the counter reaches zero. If the update mode is
synchronous, 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 615). If this register is
rewritten before the actual update occurs, the previous value is never used and is lost.
30
14
0
0
R/W
RO
29
13
reserved
0
0
CompA
Name
R/W
RO
28
12
0
0
R/W
RO
27
11
0
0
Type
R/W
RO
R/W
RO
26
10
0
0
R/W
RO
Reset
25
0x00
0x00
0
9
0
Preliminary
R/W
RO
24
0
8
0
reserved
CompA
Description
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.
Comparator A Value
The value to be compared against the counter.
R/W
RO
23
0
7
0
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
R/W
RO
20
0
4
0
R/W
RO
19
0
3
0
R/W
RO
18
0
2
0
R/W
RO
17
0
1
0
June 02, 2008
R/W
RO
16
0
0
0