TAJ1021 was wakeup by a HIGH level in WAKE_N

[wuxianlong]

Hi,all 

    I meet a problem about TJA1021 local wake-up. in datasheet TJA1021 wakeup by a low level. but I found that it can be wake-up by a high level.

BRs,
xianlong

[guoweisun]

The WAKE_N has internal pull up to battery. If the battery is high it always high also.

[wuxianlong]

Hi@guoweisun 
In our design, WAKE_N can be low during sleep. we test that High level  can wake-up tja1021

[guoweisun]

Is possible for your catch some waveforms for high level wake up?

[wuxianlong]

Hi,@guoweisun

   Thank you for your answer.
   I just asked my colleague. He say, Kevin has answered the question few years ago ,phenomena do exist.

in my test  green is INH,yellow is SLP, blue is WAKE_N

BRs,

xianlong