LM3S316 Datasheet, PDF (372/421 Pages) List of Unclassifed Manufacturers – Microcontroller

Pulse Width Modulator (PWM)
Register 10: PWM0 Control (PWM0CTL), offset 0x040
Register 11: PWM1 Control (PWM1CTL), offset 0x080
These registers configure the PWM signal generation blocks (PWM0CTL controls the PWM
generator 0 block, and so on). The Register Update mode, Debug mode, Counting mode, and
Block Enable mode are all controlled via these registers. The block produce the PWM signals,
which can be either two independent PWM signals (from the same counter), or a paired set of
PWM signals with dead-band delays added.
The PWM0 block produces the PWM0 and PWM1 outputs, and the PWM1 block produces the
PWM2 and PWM3 outputs.
PWMn Control (PWMnCTL)
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
CmpBUpdCmpAUpd LoadUpd Debug Mode Enable
Type
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:6
Name
reserved
5
CmpBUpd
4
CmpAUpd
Type
RO
R/W
R/W
3
LoadUpd
R/W
2
Debug
R/W
Reset
0
0
0
0
0
Description
Reserved bits return an indeterminate value, and should
never be changed.
Same as CmpAUpd but for the comparator B register.
The Update mode for the comparator A register. If 0,
updates to the register are reflected to the comparator the
next time the counter is 0. If 1, updates to the register are
delayed until the next time the counter is 0 after a
synchronous update has been requested through the PWM
Master Control (PWMCTL) register (see page 363).
The Update mode for the load register. If 0, updates to the
register are reflected to the counter the next time the
counter is 0. If 1, updates to the register are delayed until
the next time the counter is 0 after a synchronous update
has been requested through the PWM Master Control
(PWMCTL) register.
The behavior of the counter in Debug mode. If 0, the
counter stops running when it next reaches 0, and
continues running again when no longer in Debug mode. If
1, the counter always runs.
372
April 27, 2007
Preliminary