Two Vss in a PIC microcontroller?
Two Vss in a PIC microcontroller?
(OP)
Hi all,
That could be a stupid question...
In PIC's microcontroller family that have 2 Vss, they are the same point? Vss == to the other Vss?
I mean...
It could help me in the design of the PCB ...
but.. it will let good current flow??
Any one read about it in the datasheet?
well Vss its suposed to be 0v or the GND...
well thanks for your replys!!
bye,
KS
That could be a stupid question...
In PIC's microcontroller family that have 2 Vss, they are the same point? Vss == to the other Vss?
I mean...
It could help me in the design of the PCB ...
but.. it will let good current flow??
Any one read about it in the datasheet?
well Vss its suposed to be 0v or the GND...
well thanks for your replys!!
bye,
KS





RE: Two Vss in a PIC microcontroller?
RE: Two Vss in a PIC microcontroller?
>> You might simply blow the trace altogether
>> You might thoroughly degrade the reliability of the PIC, by running too much current in the chip trace, which may cause electromigration failure on the device.
>> You may seriously degrade the noise margin of the device, since one end of the chip will wind up at a higher potential than the other.
TTFN
RE: Two Vss in a PIC microcontroller?
Some devices have many ground pins (10 or more) and they should all be connected to the same copper ground trace or plane.
It reduces noise pickup.
You don't have to try very hard to turn on substrate diodes which can cause all sorts of problems. Mostly nasty one.
RE: Two Vss in a PIC microcontroller?
RE: Two Vss in a PIC microcontroller?
In this case the NC doesn't always mean that the pin is NOT CONNECTED it often means DO NOT CONNECT!!!
So check before using a NC pin as a convenient route for a PCB trace.
I once spent many hours debugging a circuit which had worked fine in breadboard form but failed totally on the PCB.
Electricliff
RE: Two Vss in a PIC microcontroller?
Cheers
You can live in your car, but you can't drive your House!
RE: Two Vss in a PIC microcontroller?