Hi all
I have a question about function of PWR_BTN_SNS in SABRE-SDP.
Could you tell me following question ?
Q1.
In the circuit diagram of SABR-SDP, I think that MX6_ONOFF and PWR_BTN_SNS will be low at the same time when SW1 is pushed.
Are these two signals necessary for returning from DSM ? Or is it only PWR_BTN_SNS ?
Q2.
For the above confirmation, could you verify the operation after removing R22 of SABR - SDP ?
Q3.
It seems that PWR_BTN_SNS is operated with active low.
How long time are required for the input Low section ?
Ko-hey
Solved! Go to Solution.
Hi Ko-hey
1. both signals can be used for returning from DSM
2. sorry I have not equipment for removing R22 of SABRE - SDP
3.>How long time are required for the input Low section ?
PWR_BTN_SNS is connected to EIM_D29 and configured as GPIO.
GPIO can be configured to produce interrupt on falling edge. So
" Low section" using your wording, can be =0.
Best regards
igor
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Hi Ko-hey
1. both signals can be used for returning from DSM
2. sorry I have not equipment for removing R22 of SABRE - SDP
3.>How long time are required for the input Low section ?
PWR_BTN_SNS is connected to EIM_D29 and configured as GPIO.
GPIO can be configured to produce interrupt on falling edge. So
" Low section" using your wording, can be =0.
Best regards
igor
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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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Hi igorpadykov
> 1. both signals can be used for returning from DSM
It's possible to recover with either one signal.
Am I correct ?
Ko-hey
Hi Ko-hey
yes this is correct.
Best regards
igor
Hi igorpadykov
According to your answer, i.MX6 can wakeup from MX6_ONOFF or PWR_BTN_SNS signal.
In that case, i.MX6 can wakeup from ONOFF button only because MX6_ONOFF connects only ONOFF pin.
Why does user need PWR_BTN_SNS PWR_BTN_SNS ?
Ko-hey
i.MX6 can wakeup from any unmasked interrupt.
Best regards
igor
Hi igorpadykov
Sorry, your comment make me confuse.
In that case, why does PWR_BTN_SNS need ?
The PMIC_STBY_REQ can't make any unmasked interrupt so i.MX6 need PWR_BTN_SNS for wakeup from standby with PMIC_STBY_REQ.
Am I correct ?
Ko-hey
Hi Ko-hey
>why does PWR_BTN_SNS need ?
any unmasked interrupt can wake processor from low power mode.
Both PWR_BTN_SNS and ONOFF can wake.
>The PMIC_STBY_REQ can't make any unmasked interrupt so
>i.MX6 need PWR_BTN_SNS for wakeup from standby with PMIC_STBY_REQ.
>Am I correct ?
for PMIC_STBY_REQ behaviour please check sect.18.5.3.3 STOP mode i.MX6DQ Reference Manual
https://www.nxp.com/docs/en/reference-manual/IMX6DQRM.pdf
So processor control PMIC_STBY_REQ signal when it enter/exit from low power modes.
To exit from low power mode processor should receive unmasked interrupt (from
PWR_BTN_SNS, ONOFF or other interrupt source).
Best regards
igor
Hi igorpadykov
Thank you for reply.
I understand that either PWR_BTN_SNS or ONOFF is necessary.
Do user have any SW setting for operating by ONOFF button ?
I guess I need something for make any unmasked interrupt by ONOFF behavior.
Ko-hey
Hi Ko-hey
for new questions/issues please create new threads.
Best regards
igor
Hi igorpadykov
I made a new thread as below.
https://community.nxp.com/message/1081684
Could you follow it ?
Ko-hey