stm32f107vc 5v problem,

[mahmoud boroumand]

Posted on December 24, 2017 at 15:59

hello

I'm using stm32f107vc  and send data for ws2812 with 48 channel from port 3(E,B,D) and the pins are open drain and  pull up with 2.2k resistor to 5v.

it's doesn't have problem but after a while suddenly i got a problem.pin dont insincere voltage more than 3.2V (it was 4.8 V after this problem) .

can anybody help me how can i fix this problem?

[Tesla DeLorean]

Posted on December 24, 2017 at 16:04

On the F1 chips many of the pins were not FT (5V Tolerant). Consider using buffering or level conversion parts.

[mahmoud boroumand]

Posted on December 24, 2017 at 16:53

hello

can you explain more? 

why it work  without any problem for some days ?

and in catalog

– 51/80 I/Os, all mappable on 16 external

interrupt vectors and almost all 5 V-tolerant