Dedicated Pin	68-Pin PLCC	84-Pin PLCC	100-Pin PQFP
INPUT/GCLK1	67	83	89
INPUT/GCLRn	1	1	91
INPUT/OE1	68	84	90
INPUT/OE2	2	2	92
GND	6, 16, 26, 34, 38, 48, 58, 66	7, 19, 32, 42, 47, 59, 72, 82	13, 28, 40, 45, 61, 76, 88, 97
VCCINT (5.0 V Only)	3, 35	3, 43	41, 93
VCCIO (3.3 V or 5.0 V)	11, 21, 31, 43, 53, 63	13, 26, 38, 53, 66, 78	5, 20, 36, 53, 68, 84
No Connect (N.C.)	-	6, 39, 46, 79	9, 24, 37, 44, 57, 72, 85, 96
Total User I/O Pins	52	64	76