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PWM pins

ranchu
Guru 20755 points

Hello,

I would like to understand better the PWM usage with OMAP35x.

I understand from datasheet that there are output pins for PWM. Does it mean the output itself is of type PWM (the pin is used for waveform output) or should it be connected to PWM device such as TWL4030 ?

Thanks,

Ran 

  • 0
    TI__Guru 65405 points

    Hi Ran,

    The OMAP35x can be configured to provide a programmable PWM output. You can find details about how to do this in the OMAP 35x TRM section 16.2.4.6 Pulse-Width Modulation at the link:

    http://www.ti.com/lit/ug/spruf98y/spruf98y.pdf

    About the TWL4030 - it is an integrated power-management/audio CODEC device intended for use along with the OMAP 3 Processor. It typically receives its commands either from an applications processor or from a modem and provides power conversion/regulation duties, as well as a complete audio CODEC section. In addition to generic support capabilities, the TWL4030 device is an optimized all-in-one audio and power manager to a host of OMAP processors.

    BR

    Tsvetolin Shulev

  • 0 in reply to Cvetolin Shulev-XID
    Guru 20755 points

    Hi Cvetolin,

    As to the first option "The OMAP35x can be configured to provide a programmable PWM output"
    Does it mean that these pins are analog output ? Isn't the OMAP a complete digital interface pins ?

    Thanks,

    Ran
     

  • 0 in reply to ranchu
    TI__Guru 65405 points

    Hi Ran,

    The programmable PWM output means that the OMAP35x provides digital output signal with variable duty cycle. See timing diagrams at figures 16-12 and 16-13.

    BR

    Tsvetolin Shulev