SST-DN4-PCU Hardware Reference Guide
14 Card Overview
©2009 Molex Inc.Automation & Electrical Products, Integrated Products Division
Document Edition: 1.0, Document #: 715-0101, Template Edition: 1.1, Template #: QMS-06-045
Use, duplication or disclosure of this document or any of the information contained herein is subject to the restrictions on page ii of this document.
1.4 DN4 Compatibility Overview
For a comparison of DN4 with DN3 and DNP, refer to Section D.2, Reference Documents.
The following table outlines the requirements of different PCI revisions and the PCI
requirements of the card.
Table 1: PCI Compatibility Table
PCI Specification
Revision
Supply Voltage Provided by
Motherboard
PCI I/O Signaling Voltage Level of
Motherboard
3.3V 5V 3.3V 5V
2.1
1
Optional Required Not supported Supported
2.2 Required Required Supported Supported
2.3 Required Required Supported Not supported
SST Product
SST-DN4-PCU Optional Required
2
Supported
2
Supported
1
The card requires only 5V to be supplied by the motherboard. Because 3.3V
supply voltage is optional in PCI specification revision 2.1, the card may not function in
some PCI 2.1-compliant motherboards.
2
The card will auto-detect the motherboard PCI I/O signaling level and adjust its signaling level
accordingly, allowing it to function in PCI systems that support either 5V or 3.3V I/O signaling
levels.
Summary
The card’s compatibility can be summarized as follows:
• It will operate in PCI v2.2- and v2.3-compliant systems
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