Hi,
I just want to post here our finding regarding the GPOI2 and ATTACH function this pin can be assigned to.
It seems that when GPIO2 pin is assigned the ATTACH function to, it can sink only 50uA!
It means the pull up resistor must be much higher than 10k (value usually used here and in the Eval Board as well).
If 10k is used, the GPIO2 will not be able to pull the line below ~1,2V, when the Sink is attached.
On the picture below you can see this behavior:
- GPIO1: configured to ATTACH_FLT_ALT, pull-up = 10k, pulls the line to 0V
- GPIO2: configured to ATTACH, pull-up = 10k, line stays at ~1.2V
On the other hand, if the POL function is assigned the GPIO2 to, then it works fine for the pull up value 10k.
All measurements were taken on the EVQ4242B-VE-00A, firstly with initial HW configuration, and afterwards with configuration where C7/R7 were removed.
Our FAE has been already informed regarding this “feature”, but we haven’t received any feedback or confirmation for now, why this is the case and if this can be reproduced from the MPS’s side.
Please can you check this on your side or we have a mistake on our side?
Best regards
Josko