I'm using the FM3 MCU MB9BF516N for several PCBs.
I have now some PCBs not working.
It seems that the MCU does not start, because I also get no connection with the Debugger using SWD.
What could be the reason?
In the datasheet I found in chapter 12.4.7 Power-on Reset Timing the following:
Power ramp rate dV/dt (Vcc: 0.2V to 2.7V) Min 0.8 mV/µs, Max: 1000 mV/µs
Is this a condition for proper startup of the MCU?
In other words: If the power Ramp on Vcc is slower than 0.8 mV/µs, could startup of the CPU fail?
Solved! Go to Solution.