Flip components pin 1 wrong


#1

If I flip a 28 pin sot to put it on the bottom, the pads change, but pin 1 does not change. In schema there is x and y to move pins on drawing.
How do I specify a footprint for components on bottom?


#2

The footprint for any component is unique, no matter if the component is placed on top or on bottom.

As the layout is seen from top, the footprint on bottom is seen mirrored.


#3

But the net list still shows pin 1 on the wrong corner, as does the chip outline. That’s how I noticed the problem. It is as if the component is still on top but the pads are on the bottom. It needs a mirror as the graphics allow. The pin numbers need to flip.


#4

Its not clear what you are seeing. The net list will not change, nor will the schematic.

Perhaps a screenshot would help.

Also look at the 3D it might show you a better view of what is going on.

John


#5

Then the problem has nothing to do with flipping the footprint.

The schematic symbol is bond to the footprints with the pin-pad numbers. Maybe you have chosen the wrong footprint or the wrong symbol. Flipping or rotating the footprint doesn’t change the relative position of the pins.