LSI 53C810A Signals are assigned a type. There are four signal types, Power and Ground Signals

Signals are assigned a type. There are four signal types:

IInput, a standard input only signal.

OOutput, 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 describes the Power and Ground Signals group.

Table 4.1		Power and Ground Signals
Name	Pin No.		Description
VSS-I	5, 9, 13, 18, 22, 26, 32, 37, 43,		Power supplies to the PCI I/O pins.
	87, 93, 99
1	3, 16, 28, 40, 90		Power supplies to the PCI I/O pins.
VDD-I
VSS-S	58, 63, 68, 73		Power supplies to the SCSI bus I/O pins.
VDD-S	54, 77		Power supplies to the SCSI bus I/O pins.
VSS-C	50, 81		Power supplies to the internal logic core.
VDD-C	46, 84		Power supplies to the internal logic core.

1. These pins can accept a VDD source of 3.3 or 5 V. All other VDD pins must be supplied 5 V.

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