Posted on May 28, 2014 at 07:31We are using the controller STM32F427ZIT6 from ST in our design. As we are using the NRST pin for processor reset in our older design(Atmel
AT91FR40162S-CJ
) we are trying to Bypass the Internal Reset circuitry of ST.
In ST LQFP144 Package there is no options to bypass it. It is having following 2 Options
It has to be connected VDD if we are using internal reset controller.
It has to be connected to external voltage supervisor circuit.
Our design snapshot is embedded in the question
The question we have is
Our design concept, The NRST will be released after the PDR_ON is released from the reset. So it is like bypassing the PDR_ON by using NRST.
If we connect(PDR_ON) it to ground or week pull down or float, I think the Processor will not Power up. Is it correct?
Is there any possibility or registers to bypass or eliminate the PDR_ON signal.
If I use my 2.9V reset signal from external voltage detector(Refer attached sch) as PDR_On. Is it will work.
Is there any IBIS model, Recommended Layout diagram for STM32F427ZIT6.
