TBCNT
EPWMxA
EPWMxB
TBPRD
(value)
Z
T
Z
T
Z
T
CA
CB
CA
CB
Enhanced PWM (ePWM) Module
and
contains initialization and runtime register configurations for the waveforms
. Use the code in
to define the headers.
Figure 15-29. Up-Count, Pulse Placement Asymmetric Waveform With Independent Modulation on
EPWMxA
(1)
PWM frequency = 1/( (TBPRD + 1 ) × T
TBCLK
)
(2)
Pulse can be placed anywhere within the PWM cycle (0000h - TBPRD)
(3)
High time duty proportional to (CMPB - CMPA)
(4)
EPWMxB can be used to generate a 50% duty square wave with frequency = 1/2 × ((TBPRD + 1) × TBCLK)
1526Pulse-Width Modulation Subsystem (PWMSS)
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated