2017-12-24 06:59 AM
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?
2017-12-24 07:04 AM
On the F1 chips many of the pins were not FT (5V Tolerant). Consider using buffering or level conversion parts.
2017-12-24 07:53 AM
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