User`s guide

MC68306 Power/Ground Mapping
Although the VDD pins for the microprocessor are brought out to the
preprocessor PGA socket, the preprocessor interface does not use the
microprocessor’s power; these pins are treated as no-connects. The "Shield"
signal below is connected to the preprocessor interface ground but does not
correspond to any particular MC68306 GND pin.
Table 7
MC68306 Power/Ground List
HP E2456A
PGA Pin
MC68306
QFP-132 Pin
MC68306
Signal Name
H6 1 GROUND
M5 7 VDD
L3 13 GROUND
J3 22 GROUND
H1 28 VDD
F5 34 GROUND
E1 40 VDD
C2 46 GROUND
C4 55 GROUND
A5 61 VDD
E7 67 GROUND
A8 73 VDD
B10 79 GROUND
D10 88 GROUND
E12 94 VDD
G8 100 GROUND
H12 106 VDD
K11 112 GROUND
K9 121 GROUND
M8 127 VDD
E5 N/C Shield
E6 N/C Shield
E8 N/C Shield
F6 N/C Shield
F7 N/C Shield
F8 N/C Shield
Preprocessor Interface Hardware Reference
Signal-to-Connector Mapping
3–14 MC68306 Preprocessor