TAJ1021 was wakeup by a HIGH level in WAKE_N

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TAJ1021 was wakeup by a HIGH level in WAKE_N

899 次查看
wuxianlong
Contributor III

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.

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BRs,
xianlong

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890 次查看
guoweisun
NXP TechSupport
NXP TechSupport

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

 

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889 次查看
wuxianlong
Contributor III

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

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guoweisun
NXP TechSupport
NXP TechSupport

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

 

 

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885 次查看
wuxianlong
Contributor III

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
mcl6.png
BRs,

xianlong

 

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