own STM32F4 Board .. whats with VCAP1 and PDR_on Pin?

sam239955 · ‎2012-02-29

Posted on February 29, 2012 at 13:22

Hi,

I'm almost done finishing my STM32F4 Eval Board. But I still have a few questions:

I want to use the internal regulator so I connected Vcap1 and Vcap2 with cap's.

There is still this PDR_ON Pin. should i leave it unconnected?

I don't really need the internal reset afterpPower-down function.

with regards

Alex

sam239955 · ‎2012-02-29

Posted on February 29, 2012 at 16:55

OK ST updated the datasheet.

@LQFP100 connect to VSS (cause its now always internal ON)

@LQFPB144/176 take look at the figure

flyer31 · ‎2012-03-06

Posted on March 06, 2012 at 13:00

But in the STM32F40x and STM32F41x datasheets in the pin diagram of LQFP100 in figure 11, chapter 3, the pin 99 still has the name ''PDR_ON''. This is misleading. It would be better, if the pin 99 is named ''VSS'' there. (at least as I understand it, this Pin 99 now just is VSS pin).