Description
The Mercury device pin tables on Altera web site do not specify the pin numbers for the GND_CKLK pins, however, the pin table included in Quartus® Online Help gives these pin numbers.
A customer might be interested in the pin numbers to isolate the PLL GND pins from the noisy GND used for I/Os and to decouple the respective VCC_CKLK pins.
The pin numbers for GND_CKLK are not identified in the pin table files because all GND pins are connected inside the package. Isolating the GND_CKLK pins is not useful, however, it is helpful to know them for decoupling the PLL power pins.