LM3S5762 Datasheet, PDF (756/841 Pages) Texas Instruments – Stellaris® LM3S5762 Microcontroller

Pulse Width Modulator (PWM)
Register 40: PWM0 Dead-Band Control (PWM0DBCTL), offset 0x068
Register 41: PWM1 Dead-Band Control (PWM1DBCTL), offset 0x0A8
Register 42: PWM2 Dead-Band Control (PWM2DBCTL), offset 0x0E8
The PWM0DBCTL register controls the dead-band generator, which produces the PWM0 and PWM1
signals based on the PWM0A and PWM0B signals. When disabled, the PWM0A signal passes through
to the PWM0 signal and the PWM0B signal passes through to the PWM1 signal. When enabled and
inverting the resulting waveform, the PWM0B signal is ignored; the PWM0 signal is generated by
delaying the rising edge(s) of the PWM0A signal by the value in the PWM0DBRISE register (see
page 757), and the PWM1 signal is generated by delaying the falling edge(s) of the PWM0A signal by
the value in the PWM0DBFALL register (see page 758). In a similar manner, PWM2 and PWM3 are
produced from the PWM1A and PWM1B signals, and PWM4 and PWM5 are produced from the PWM2A
and PWM2B signals.
If the Dead-Band Control mode is immediate (based on the DBCtlUpd field encoding in the
PWMnCTL register), this 16-bit DBCtlUpd 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 729).
If this register is rewritten before the actual update occurs, the previous value is never used and is
lost.
PWM0 Dead-Band Control (PWM0DBCTL)
Base 0x4002.8000
Offset 0x068
Type R/W, reset 0x0000.0000
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
Enable
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:1
0
Name
reserved
Enable
Type
RO
R/W
Reset
0x00
0
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.
Dead-Band Generator Enable
When set, the dead-band generator inserts dead bands into the output
signals; when clear, it simply passes the PWM signals through.
756
November 17, 2011
Texas Instruments-Production Data