Are the internal pull-up & pull-down resistors active in the sleep modes ?

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
User13960
Level 3
Level 3
First like received
Hi all,

I am planning to use an interrupt from a port pin to wake from sleep mode and would like to know if the internal pull-up & pull-down resistors active in the sleep modes ?

Thank you very much.

PHAB
0 Likes
3 Replies
jferreira
Employee
Employee
10 sign-ins 5 sign-ins First like received
Hi,

Have a look at reference manual, GPIO chapter, Power Saving Mode Operation section.
If you do not activate the Pin Power Save the pull up/down will be active.

Regards,
Jesus
0 Likes
User13960
Level 3
Level 3
First like received
Thank you once again Jesus.
0 Likes
User17585
Level 1
Level 1
First like given Welcome! 5 replies posted
Hi,

what if power is completely off? In my application a MOSFET gate is driven directly by a GPIO of the XMC. Do I have to add an external pulldown resistor to be sure that the gate will have a voltage clearly less than the Vth of the MOSFET or are the XMC GPIOs doing that automatically?

Thanks,
Markus
0 Likes