Espressif ESP32 Technical Reference Manual page 441

16 Motor Control PWM (PWM)
Highlights for Operation of the Dead Time Generator
Options for setting up the dead-time submodule are shown in Figure 16-22.
Figure 16-22. Options for Setting up the Dead Time Generator Submodule
S0-8 in the figure above are switches controlled by registers
Table 16-5. Dead Time Generator Switches Control Registers
Switch
S0
S1
S2
S3
S4
S5
S6
S7
S8
All switch combinations are supported, but not all of them represent the typical modes of use. Table
documents some typical dead time configurations. In these configurations the position of S4 and S5 sets
PWMxA as the common source of both falling-edge and rising-edge delay. The modes presented in table
may be categorized as follows:
• Mode 1: Bypass delays on both falling (FED) as well as raising edge (RED)
In this mode the dead time submodule is disabled. Signals PWMxA and PWMxB pass through without any
modifications.
• Mode 2-5: Classical Dead Time Polarity Settings
These modes represent typical configurations of polarity and should cover the active-high/low modes in
available industry power switch gate drivers. The typical waveforms are shown in Figures
Espressif Systems
PWM_DTx_CFG_REG
Register
PWM_DTx_B_OUTBYPASS
PWM_DTx_A_OUTBYPASS
PWM_DTx_RED_OUTINVERT
PWM_DTx_FED_OUTINVERT
PWM_DTx_RED_INSEL
PWM_DTx_FED_INSEL
PWM_DTx_A_OUTSWAP
PWM_DTx_B_OUTSWAP
PWM_DTx_DEB_MODE
441
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shown in Table 16-5.
16-6
16-6
16-23 to 16-26.
ESP32 TRM (Version 5.2)