I have an MSI Z68A-G43 (G3) motherboard with an Asmedia ASM1083 PCI-E to PCI bridge chip with 2 signal traces that each go into a serpentine for about 2" and then just end, without being connected to anything. These traces are on opposite sides of the circuit board, and actually they aren't even connected to their chip because the jumper positions for them are empty (no even pins soldered in). Also each serpentine trace is surrounded by a pair of copper traces that aren't connected at either end. How do such surrounding traces help when they're not connected to anything at either end?
I can't find a datasheet or even pinout for this chip, but what's normally the purpose of circuit traces like this? Is it for measuring the capacitance of the circuit board material, to adjust the signal timing?
I can't find a datasheet or even pinout for this chip, but what's normally the purpose of circuit traces like this? Is it for measuring the capacitance of the circuit board material, to adjust the signal timing?
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