TMS320F28378D: the response time of the TZ

Bruno Leoni

Hi, I'd like to know the response time of the TZ function.

According to the TRM(TMS320F2837xD, p1913),

"When a cycle-by-cycle trip event occurs, the action specified in the TZCTL[TZA] and TZCTL[TZB] bits is carried out immediately on the EPWMxA and/or EPWMxB outputs."

it is described as "immediately" but, how much does it take time(**ns) from the TZn signal goes low to EPWMx goes low?

Does it detect specific threshold voltage with an internal comparator of microcontroller?

Best Regards,

Bruno

over 4 years ago

0 Marlyn Rosales Castaneda20 over 4 years ago

TI__Mastermind 27270 points

Hi Bruno,

Bruno Leoni said:
how much does it take time(**ns) from the TZn signal goes low to EPWMx goes low?

Please take a look at the following thread: https://e2e.ti.com/support/microcontrollers/c2000-microcontrollers-group/c2000/f/c2000-microcontrollers-forum/727750/tms320f28379d-shortest-time-between-input-on-cmpss-and-disabling-of-pwm/2685545#2685545

Bruno Leoni said:
Does it detect specific threshold voltage with an internal comparator of microcontroller?

The F28379D does have comparators which can be fed to the ePWM module and be used a trip source. The time for this is described in the thread I linked to.

Best Regards,

Marlyn

0 Bruno Leoni over 4 years ago in reply to Marlyn Rosales Castaneda20

Prodigy 10 points

Hi Marlyn,

Thank you for your reply.

Bruno

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TMS320F28378D: the response time of the TZ