tomcody Posted March 12, 2011 Report Posted March 12, 2011 Hello everybody I realized that in the IC2 (upper YAC512) the VSS pin is not physically connected, however when using ratsnest appears connected. I'm not a specialist but how can IC2 work without a ground? Thank you in advance :smile:
Wilba Posted March 13, 2011 Report Posted March 13, 2011 I haven't looked at the Eagle brd file (I can't even load it), but I can confirm both YAC512 should have VSS connected to ground, and on the OPL3 module itself, they are both connected to the ground plane. Maybe because those chips are mounted on the bottom makes it a bit confusing? i.e. pin 2 (VSS) is one pin up from bottom left corner.
Shuriken Posted March 14, 2011 Report Posted March 14, 2011 Pin12 (TST2) is not connected. Pin2 is. Like Wilba said, don't forget its upside down.
tomcody Posted March 15, 2011 Author Report Posted March 15, 2011 I do understand it's upside down, in my case I have to connect the pin 2 to groud because I'm not making the PCB with ground plane (toner saving :wink:) and that's the only commponent (appears to be) is not physically connected to ground line. Thanks for your replies.
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