LSI Symbios SYM53C040, Technical Manual

Page: 67 / 214

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