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MSP430FR2111: How long does it take to jump in eCOMP interruption after trigger it from LPM3 mode?

Daniel Fang
Genius 11600 points
Part Number: MSP430FR2111

Hi

How long does it take to jump in eCOMP interruption after trigger it from LPM3 mode?

We test it by measuring the total GPIO toggle time after trigger eCMOP from LPM3 mode.

The total time is 

a. wake up from LPM3 to active, 10us

b. active mode, jump in eCOMP interruption, ?us

c. execute GPIO toggle in interruption at 4M and 16M separately.

1. Running at 4MHz, it takes about total 40us.

2. Running at 16MHz, total time is 32us.

After reduce the 10us LPM3 wake up time, it takes about 20us to jump in interruption? Is it right? Thanks.

By the way, here is eCOP setting

（1）     ECOMP_INPUT_0/ECOMP_INPUT_1/ECOMP_FILTER_DELAY_OFF/ECOMP_NORMAL_OUTPUT_POLARITY

（2）     The rising edge and falling edge interruption

（3）     HysteresisMode：ECOMP_HYSTERESIS_MODE_DISABLE

  • 0
    TI__Genius 13215 points
    Hi Daniel,

    Can you give notes of key points on you waveform? what's the signal of the waveform(green one)?where is the wake up trigger signal? How you measure the time spent from trigger to GPIO toggle?
  • 0
    TI__Genius 13215 points
    Hi Daniel,

    Since discussion by email, I would like to temporary close the thread by clicking "TI Thinks Resolved". No action needed for you.
    Please feel free to reply on the E2E thread to re-open the discussion when further question from customer. And I will post the answer here for other communities' reference when we get the final closing.

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