LSI 53C810A - Manual (Page 65)

4-3
Signals are assigned a type. There are four signal types:
Table 4.1 describes the Power and Ground Signals group.
I Input, a standard input only signal.
O Output, a standard output driver (typically a Totem Pole Output).
T/S 3-state, a bidirectional, 3-state input/output signal.
S/T/S Sustained 3-state, an active LOW 3-state signal owned and driven by
one and only one agent at a time.
Table 4.1 Power and Ground Signals
Name Pin No. Description
V
SS-I
5, 9, 13, 18, 22, 26, 32, 37, 43,
87, 93, 99 Power supplies to the PCI I/O pins.
V
DD-I
1
3, 16, 28, 40, 90 Power supplies to the PCI I/O pins.
V
SS-S
58, 63, 68, 73 Power supplies to the SCSI bus I/O pins.
V
DD-S
54, 77 Power supplies to the SCSI bus I/O pins.
V
SS-C
50, 81 Power supplies to the internal logic core.
V
DD-C
46, 84 Power supplies to the internal logic core.
1. These pins can accept a V
DD
source of 3.3 or 5 V. All other V
DD
pins must be supplied 5 V.