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3.1.4 Power and Ground Signals
Table 3.8
Power and Grounds Signals
Pin
Pin
Name
Number
VSS_IO
1, 21, 33,
38, 50, 57,
62, 76, 83
VDD_IO
12, 24, 43,
71, 88, 154
VSS_
100, 110,
SCSI
120, 123,
133, 143
VDD_
105, 115,
SCSI
128, 138,
148
VSS_
65, 156
CORE
VDD_
68, 159
CORE
1. For optimal operation, the power pins should be powered up at the same time or in this order:
VDD_CORE, VDD_IO, VDD_SCSI.
Table 3.8
describes the signals for the Power and Ground Signals group.
BGA Ball
Number
F7, G6,
V
SS
G7, G8,
be connected to ground.
H7
B4, F4,
V
DD
H1, K13,
be connected to + 3.3 V power supply.
L9, N3
V
SS
Must be connected to ground.
A10, C7,
V
DD
E6, E10,
Must be connected to + 3.3 V power
F11
supply.
A3, N8
V
SS
connected to ground.
J8, D4
V
DD
connected to + 3.3 V power supply.
Safety Mode Signals
1
Description
supply for I/O signal pins. Must
supply for I/O signal pins. Must
supply for SCSI I/O signal pins.
supply for SCSI I/O signal pins.
supply for core logic. Must be
supply for core logic. Must be
Internal
Pad Type
Resistor
V
–
SS
V
–
DD
V
–
SS
V
–
DD
V
–
SS
V
–
DD
3-17
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