I found that this chip on my product pcb, could fail when being powered up shortly after being powered down. And a reset signal could not bring it back to work. The only way to bring it back is to do another power cycle and wait longer before turning on the power.
Why this is happening? What is the status of the chip? And most important, what can I do to prevent this from happening?
btw, I have a reset monitor chip on pcb, but it does no good on this. A reset signal could not wake it up at all.
Thanks