Not braindead but paralyzed.
I should test some communication between one master BS2 and another BS2 + the Pe.
The master was safe on the BOE, the other two was placed on a different breadboard next by.
The plan was that the other BS2Pe and BS2 should get their power from Vdd on the BOE, from the connectors ontop of the breadboard.
Due to bad luck and aging eyes I put the plus wire into Vin instead of Vdd, the result was 8,2 V into the two microcontrollers Vcc inputs.
The BS2 didnt seem to be harmed but the Pe ran for a moment without problem until it got stuck and also real hot. But no smoke.
After cutting the power real fast and later connect to normal 5V the BS2 seems to be OK, but the Pe still won't work.
When testing later I found out that the controller can receive software and also run program but can no longer control the PINs.
Setting PIN 0-15 LOW result all pins low except for PIN 7, 11,12 and 15 who remains high.
Setting PIN 0-15 HIGH result that all pins except P10 goes high.
But I suspect several of the others don't behave as they should because I could no longer receive from Master BS2 even I changed from P7 to P8.
So how much over-voltage can be fed into Vcc before it get damaged and is it true that a green BS2 can accept more voltage than the red Pe?