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CCS/TMS320F28069: TMS320F28069

PowerGuy
Intellectual 415 points
Part Number: TMS320F28069


Tool/software: Code Composer Studio

Hi,

I'm currently using the F28069 for digital power control.
My project and controls are working.

I just noticed that the boot up time for my processor seems to be around 100mS.
Meaning from the time VDD reaches 3.3V to when I start outputting PWMs.

I do have code/conditions which will add a little delay until I output PWMs but I don't think it would add up to longer than a 1ms.

So my question is, what is the normal boot up time for the F28069 ?
Timer from getting 3.3V to starting to execute code ?
Are there registers I can configure to speed up the boot up process ?
Does 100mS seem normal ?

thanks!

  • 0
    TI__Mastermind 19810 points
    Powerguy,
    The device boot ROM execution time can be anticipated from the device data sheet, section 5.12 shows the time boot mode pins should be pulled active, table 5.13. On power up or after reset device is not running out of PLL but out of Internal Oscillator and 1000 cycles at 10 MHz is 100uSec.

    How are you measuring the 100ms time? are you toggling a GPIO at the entry point in flash application?

    Best Regards
    Santosh Athuru
  • 0 in reply to Santosh Athuru
    Intellectual 415 points

    No, I didn't toggle a GPIO.

    I measured from the time 3.3V turns on to the time I started outputting PWMs.

    I will try toggling a GPIO.