pdr_on connection

[joe239955_stm1_stmicro]

Posted on April 05, 2013 at 23:37

For regulator on and internal reset off should the pdr_on be connected to vcc or vdd or left floating?

Thanks

#stm32f417-ufbga176

[Tesla DeLorean]

Posted on April 06, 2013 at 01:00

My money is on none of those three. I suspect PDR_ON would want an inverted reset signal like the other devices.

The document I pulled (Data Sheet/Manual Rev 3) does seem to miss that case for the UFBGA176, I will see if I can locate something more pertinent. Suggest you also discuss with an FAE.

[Tesla DeLorean]

Posted on April 06, 2013 at 01:19

One of these LQFP176 is a typo that should refer to your part. The mode you're describing requires you to provide for the reset externally, via NRST and PDR_ON. This is my opinion, you'll need to verify/validate to your own satisfaction.

Diagram for externally sourced signal

Discuss with an FAE