LM3S1150-IQC50-A1 Luminary Micro, Inc., LM3S1150-IQC50-A1 Datasheet - Page 399

• Manufacturer Part Number: LM3S1150-IQC50-A1
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

PWM0 Generator A Control (PWM0GENA)
Base 0x4002.8000
Offset 0x060
Type R/W, reset 0x0000.0000
June 14, 2007
Reset
Reset
Type
Type
Bit/Field
31:12
11:10
9:8
7:6
RO
RO
31
15
0
0
Register 32: PWM0 Generator A Control (PWM0GENA), offset 0x060
Register 33: PWM1 Generator A Control (PWM1GENA), offset 0x0A0
Register 34: PWM2 Generator A Control (PWM2GENA), offset 0x0E0
These registers control the generation of the PWMnA signal based on the load and zero output pulses
from the counter, as well as the compare A and compare B pulses from the comparators
(PWM0GENA controls the PWM generator 0 block, and so on). When the counter is running in
Count-Down mode, only four of these events occur; when running in Count-Up/Down mode, all six
occur. These events provide great flexibility in the positioning and duty cycle of the PWM signal that
is produced.
The PWM0GENA register controls generation of the PWM0A signal; PWM1GENA, the PWM1A signal;
and PWM2GENA, the PWM2A signal.
Each field in these registers can take on one of the values defined in Table 16-2 on page 400, which
defines the effect of the event on the output signal.
If a zero or load event coincides with a compare A or compare B event, the zero or load action is
taken and the compare A or compare B action is ignored. If a compare A event coincides with a
compare B event, the compare A action is taken and the compare B action is ignored.
RO
RO
30
14
0
0
reserved
ActCmpBD
ActCmpBU
ActCmpAD
reserved
Name
RO
RO
29
13
0
0
Luminary Micro Confidential-Advance Product Information
RO
RO
28
12
0
0
R/W
RO
Type
27
11
R/W
R/W
R/W
0
0
RO
ActCmpBD
R/W
RO
26
10
0
0
Reset
0
0
0
0
R/W
RO
25
0
9
0
ActCmpBU
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.
The action to be taken when the counter matches comparator B while
counting down.
See Table 16-2 on page 400, which defines the effect of the event on
the output signal.
The action to be taken when the counter matches comparator B while
counting up. Occurs only when the Mode bit in the PWMnCTL register
(see page 391) is set to 1.
See Table 16-2 on page 400, which defines the effect of the event on
the output signal.
The action to be taken when the counter matches comparator A while
counting down.
See Table 16-2 on page 400, which defines the effect of the event on
the output signal.
R/W
RO
24
0
8
0
reserved
R/W
RO
23
0
7
0
ActCmpAD
R/W
RO
22
0
6
0
R/W
RO
21
0
5
0
ActCmpAU
R/W
RO
20
0
4
0
LM3S1150 Microcontroller
R/W
RO
19
0
3
0
ActLoad
R/W
RO
18
0
2
0
R/W
RO
17
0
1
0
ActZero
R/W
RO
16
0
0
0
399