LM3S3768 Luminary Micro, Inc, LM3S3768 Datasheet - Page 650

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

Reset
Reset
Type
Type
Pulse Width Modulator (PWM)
PWM0 Dead-Band Control (PWM0DBCTL)
Base 0x4002.8000
Offset 0x068
Type R/W, reset 0x0000.0000
650
Bit/Field
31:1
RO
RO
0
31
15
0
0
RO
RO
Register 51: PWM0 Dead-Band Control (PWM0DBCTL), offset 0x068
Register 52: PWM1 Dead-Band Control (PWM1DBCTL), offset 0x0A8
Register 53: PWM2 Dead-Band Control (PWM2DBCTL), offset 0x0E8
Register 54: PWM3 Dead-Band Control (PWM3DBCTL), offset 0x128
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 651), 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 652). In a similar manner, PWM2 and PWM3 are
produced from the PWM1A and PWM1B signals, PWM4 and PWM5 are produced from the PWM2A and
PWM2B signals, and PWM6 and PWM7 are produced from the PWM3A and PWM3B 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 615).
If this register is rewritten before the actual update occurs, the previous value is never used and is
lost.
30
14
0
0
RO
RO
29
13
reserved
0
0
Enable
Name
RO
RO
28
12
0
0
RO
RO
27
11
0
0
Type
R/W
RO
RO
RO
26
10
0
0
RO
RO
Reset
25
0x00
0
9
0
0
reserved
Preliminary
RO
RO
24
0
8
0
reserved
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.
RO
RO
23
0
7
0
RO
RO
22
0
6
0
RO
RO
21
0
5
0
RO
RO
20
0
4
0
RO
RO
19
0
3
0
RO
RO
18
0
2
0
RO
RO
17
0
1
0
June 02, 2008
Enable
R/W
RO
16
0
0
0