Datasheet

TMS320F28030, TMS320F28031, TMS320F28032

TMS320F28033, TMS320F28034, TMS320F28035

www.ti.com

SPRS584J –APRIL 2009–REVISED OCTOBER 2013

4.9 High-Resolution PWM (HRPWM)

This module combines multiple delay lines in a single module and a simplified calibration system by using

a dedicated calibration delay line. For each ePWM module there is one HR delay line.

The HRPWM module offers PWM resolution (time granularity) that is significantly better than what can be

achieved using conventionally derived digital PWM methods. The key points for the HRPWM module are:

• Significantly extends the time resolution capabilities of conventionally derived digital PWM

• This capability can be utilized in both single edge (duty cycle and phase-shift control) as well as dual

edge control for frequency/period modulation.

• Finer time granularity control or edge positioning is controlled via extensions to the Compare A and

Phase registers of the ePWM module.

• HRPWM capabilities, when available on a particular device, are offered only on the A signal path of an

ePWM module (that is, on the EPWMxA output). EPWMxB output has conventional PWM capabilities.

NOTE

The minimum SYSCLKOUT frequency allowed for HRPWM is 60 MHz.

NOTE

When dual-edge high-resolution is enabled (high-resolution period mode), the PWMxB output

is not available for use.

For more information on the HRPWM, see the TMS320x2802x, 2803x Piccolo High Resolution Pulse

Width Modulator (HRPWM) Reference Guide (literature number SPRUGE8).

Submit Documentation Feedback

Product Folder Links: TMS320F28030 TMS320F28031 TMS320F28032 TMS320F28033 TMS320F28034

TMS320F28035