For example the pin label on the schematic of TMS570 Launch pad
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Hi hongbo,
It indicates where that terminal is connected.
If you see any schematic page, you can find three things.
1. Page Numbers.
2. Column Numbers.
3. Row Numbers.
For example,
The 9.4b implies that PageNumber.ColoumnNumberRowNumber
So, the corresponding pin is connected in the 9th page, 4th coloumn and B Row.
See again here represented with 3.5A and 3.5B where other ends are present.
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Thanks & Regards,
Jagadish.