Register 52: PWM0 Dead-Band Control (PWM0DBCTL), offset 0x068
Register 53: PWM1 Dead-Band Control (PWM1DBCTL), offset 0x0A8
Register 54: PWM2 Dead-Band Control (PWM2DBCTL), offset 0x0E8
Register 55: PWM3 Dead-Band Control (PWM3DBCTL), offset 0x128
The PWMnDBCTL register controls the dead-band generator, which produces the MnPWMn signals
based on the pwmA and pwmB signals. When disabled, the pwmA signal passes through to the
pwmA' signal and the pwmB signal passes through to the pwmB' signal. When dead-band control
is enabled, the pwmB signal is ignored, the pwmA' signal is generated by delaying the rising edge(s)
of the pwmA signal by the value in the PWMnDBRISE register (see page 1731), and the pwmB' signal
is generated by inverting the pwmA signal and delaying the falling edge(s) of the pwmA signal by
the value in the PWMnDBFALL register (see page 1732). The Output Control block outputs the pwm0A'
signal on the MnPWM0 signal and the pwm0B' signal on the MnPWM1 signal. In a similar manner,
MnPWM2 and MnPWM3 are produced from the pwm1A' and pwm1B' signals, MnPWM4 and MnPWM5
are produced from the pwm2A' and pwm2B' signals, and MnPWM6 and MnPWM7 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), the ENABLE bit value is used immediately. If the update mode is locally
synchronized, this value is used the next time the counter reaches zero. If the update mode is
globally synchronized, this value 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 1683).
If this register is rewritten before the actual update occurs, the previous value is never used and is
lost.
PWMn Dead-Band Control (PWMnDBCTL)
PWM0 base: 0x4002.8000
Offset 0x068
Type RW, reset 0x0000.0000
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
ENABLEreserved
RWROROROROROROROROROROROROROROROType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
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.
0x0000.000ROreserved31:1
Dead-Band Generator Enable
DescriptionValue
The pwmA and pwmB signals pass through to the pwmA' and
pwmB' signals unmodified.
0
The dead-band generator modifies the pwmA signal by inserting
dead bands into the pwmA' and pwmB' signals.
1
0RWENABLE0
June 18, 20141730
Texas Instruments-Production Data
Pulse Width Modulator (PWM)
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