Dead-Band Generator Submodule Registers - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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ePWM Submodules

Operational Highlights for the Dead-Band Submodule

The following sections provide the operational highlights.

The dead-band submodule has two groups of independent selection options as shown in

Input Source Selection:

The input signals to the dead-band module are the EPWMxA and EPWMxB output signals from the

action-qualifier. In this section they will be referred to as EPWMxA In and EPWMxB In. Using the

DBCTL[IN_MODE) control bits, the signal source for each delay, falling-edge or rising-edge, can be

– EPWMxA In is the source for both falling-edge and rising-edge delay. This is the default mode.

– EPWMxA In is the source for falling-edge delay, EPWMxB In is the source for rising-edge delay.

– EPWMxA In is the source for rising edge delay, EPWMxB In is the source for falling-edge delay.

– EPWMxB In is the source for both falling-edge and rising-edge delay.

Half Cycle Clocking:

The dead-band submodule can be clocked using half cycle clocking to double the resolution (i.e.

counter clocked at 2× TBCLK)

Output Mode Control:

The output mode is configured by way of the DBCTL[OUT_MODE] bits. These bits determine if the

falling-edge delay, rising-edge delay, neither, or both are applied to the input signals.

Polarity Control:

The polarity control (DBCTL[POLSEL]) allows you to specify whether the rising-edge delayed signal

and/or the falling-edge delayed signal is to be inverted before being sent out of the dead-band

C28 Enhanced Pulse Width Modulator (ePWM) Module

Table 7-14. Dead-Band Generator Submodule Registers

Address Offset

Dead-Band Control Register

Dead-Band Rising Edge Delay Count Register

Dead-Band Falling Edge Delay Count Register

Dead-Band Generator Rising Edge Delay High Resolution

Mirror Register

Dead-Band Generator Rising Edge Delay Count Mirror

Dead-Band Generator Falling Edge Delay High Resolution

Dead-Band Generator Falling Edge Delay Count Register

SPRUH22I – April 2012 – Revised November 2019

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