• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 82 subscribers
  • Views 424 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS320F28035: Internal crystal oscillator tolerance and Clock difference between CPU timers

Jim Chen (SEM)
Intellectual 2590 points

Part Number: TMS320F28035

Hi experts,

My customer wants to know Internal crystal oscillator tolerance and Clock difference between CPU timers in F28035. I can only find the Zero-Pin Oscillator Frequency Movement With Temperature, and it seems about +-4.25%. Is it right?

Do we have the value of clock difference between CPU times? For example, CPU timer0 and timer1 both time 100ms， and the actual timing may be longer for one and shorter for the other. So how long is the difference between the two timings?

Thanks and regards,

Jim

  • 0
    TI__Guru* 83270 points

    Jim,

    Since these timers are fed from the same digital logic/clock, there will not be any difference in their output state due to timing.  All logic on the device is implemented to meet the maximum operating frequency of the device, so any local setup/hold timings are accounted for.  So even as the internal oscillator moves due to temperature the effect is the same on both timers in this example.  Any error related to 100ms would be from the internal oscillator tolerance, but would be the same from both timers.

    Best,

    Matthew