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I.MX6UL + PF3001A7 POR_n behaviour when placing Scope or Multimeter Probe

Question asked by Nacho Diz on Aug 10, 2017
Latest reply on Aug 15, 2017 by Pavel Chubakov
Branched to a new discussion

Dear All

I.MX6 Ultralite pullups PORn to +SNVS Internally with weak 100k Pullup Resistor
Our PMIC PF3001A7 PORn output its open drain
So the SoC pullups this line

If i place the Agilent U1257B multimeter or Scope probes over SoC POR_n Testpoint the Soc Resets!

I also Added external 10k pullup to SNVS but This till ocurs

Any idea?

Perhaps Probe Capacitance ...





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