Hello,
I have two questions about PMIC_STBY_REQ pin driver.
In thread What pull PMIC_ON_REQ signal up when i.MX6 PMIC_ON_REQ is low?
It say that "PMIC_STBY_REQ is i.MX6 (actively driven) output. No need for pull up resistor, as for open drain signals."
But in document Table 2-6 of page 17 in Hardware Development Guide(IMX6DQ6SDLHDG.pdf),
It say that "PMIC_STBY_REQ – open-drain output." (without pull-up)
The other hand, PMIC_ON_REQ say that "open-drain output, on-chip 100 kOhm pull-up"
Old version of Hardware Development Guide(IMX6DQ6SDLHDG.pdf)
It say that PMIC_STBY_REQ – push-pull output.
In datasheet, it say only "output Low" as "Out of Reset Condition."
1) Which is a correct answer of PMIC_STBY_REQ pin driver model?
a. open-drain
b. open-drain with internal pull-up
c. push-pull
2) If it is open-drain output, which chip (i.MX6D or MMPF0100) pulls PMIC_STBY_REQ line to high?
Best regards,
Ishii.
Solved! Go to Solution.
Hi Ishii,
PMIC_STBY_REQ is a push-pull output referenced to VDD_SNVS_IN (always ON), so VDD_SNVS_IN must be present for this pin to function.
PMIC_STBY_REQ should be directly connected to the STANDBY pin of the MMPF0100 without the need of an external pull-up resistor.
Have a great day,
Jose
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hello Jose,
Thank you for your quick response.
I understand that PMIC_STBY_REQ is a push-pull and drive by VDD_SNVS_IN.
Best regards,
Ishii.
Hi Ishii,
PMIC_STBY_REQ is a push-pull output referenced to VDD_SNVS_IN (always ON), so VDD_SNVS_IN must be present for this pin to function.
PMIC_STBY_REQ should be directly connected to the STANDBY pin of the MMPF0100 without the need of an external pull-up resistor.
Have a great day,
Jose
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------