PEX 8112 Fwd Riser Reference Design for Board Revision 1.0 – Version 1.1
Copyright © 2010 by PLX Technology, Inc. All rights reserved iii
CONTENTS
1. General Information............................................................................................................................1
1.1 PEX 8112 Features.......................................................................................................................2
1.2 PEX 8112 Fwd Riser Features......................................................................................................2
2. PEX 8112 Fwd Riser System Architecture .........................................................................................3
3. PEX 8112 Fwd Riser Hardware Architecture......................................................................................4
3.1 PEX 8112 PCI Express Bridge Device..........................................................................................4
3.2 Serial EEPROM ............................................................................................................................4
3.3 PCI Interface.................................................................................................................................4
3.3.1 PCI Power...............................................................................................................................5
3.4 PCI Express Interface...................................................................................................................5
3.4.1 RefClk .....................................................................................................................................5
3.4.2 PERST#..................................................................................................................................5
3.5 LED Indicators...............................................................................................................................5
3.6 PEX 8112 Fwd Riser Power..........................................................................................................5
3.6.1 PEX 8112 Bridge Device Power .............................................................................................5
3.7 Power Management Signaling......................................................................................................6
3.7.1 Wakeup...................................................................................................................................6
4. MECHANICAL ARCHITECTURE................................................................................................................7
4.1 Monitoring Point, Indicator, Control, and DIP Switch Summary....................................................7
4.1.1 Monitoring Points ....................................................................................................................7
4.1.2 General-Purpose I/O, PWR_OK Signals Access Points.........................................................7
4.1.3 PCI Bus Configurations...........................................................................................................7
4.1.4 PCB Stackup...........................................................................................................................8
5. References..........................................................................................................................................9
6. Bill of Materials and Schematics.......................................................................................................10
FIGURES
Figure 1. PEX 8112 Fwd Riser – 3.3V PCI...............................................................................................1
Figure 2. PEX 8112 Fwd Riser – 5V PCI..................................................................................................1
Figure 3. PEX 8112 Fwd Riser Hardware Architecture.............................................................................4
Figure 4. PEX 8112 Fwd Riser Stackup ...................................................................................................8
TABLES
Table 1. PEX 8112 Fwd Riser LED Indicator Function.............................................................................5
Table 2. PEX 8112 Fwd Riser Default Jumper Settings...........................................................................7
