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PEX 8608
PLX Technology PEX 8608 Manuals
Manuals and User Guides for PLX Technology PEX 8608. We have
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PLX Technology PEX 8608 manual available for free PDF download: Quick Start Manual
PLX Technology PEX 8608 Quick Start Manual (26 pages)
Brand:
PLX Technology
| Category:
Computer Hardware
| Size: 0 MB
Table of Contents
Table of Contents
3
Preface
5
Notice
5
Revision History
5
Introduction
6
PCI Express Link Interface
6
Figure 1. Sample PCI Express Link Block Diagram
6
Transmitter
7
Figure 2. Single-Ended Versus Differential Voltage
7
Receiver
9
Reference Clock
9
Table 1. Receiver Equalization Settings
9
Figure 3. Transport Delay Delta
10
Figure 4. PEX 8608 Refclk Circuit
10
Spread Spectrum Clocking (SSC)
11
Spread Spectrum Clock Isolation
11
Figure 5. Single Reference Clock Scheme (STRAP_SSC_ISO_ENABLE# Pulled High)
11
Channel
12
Figure 6. Dual Reference Clock, SSC Crossing Scheme (STRAP_SSC_ISO_ENABLE# Pulled Low)
12
PCB Layout and Stackup Considerations
13
PEX 8608 BGA Routing Escape and De-Coupling Capacitor Placement
13
Add-In Board Routing
14
System Board Routing
14
Figure 7. Add-In Card Routing to PCI Express Gold Fingers
14
Figure 8. System Board Routing to PCI Express Slot
14
Midbus Routing
15
PCB Stackup Considerations
15
Figure 9. PCI Express Midbus Routing Example
15
Non-Transparent Port Function
16
Figure 10. Enable NT Function with NT Strapping Balls
16
Figure 11. Disable NT Function
16
Hot-Plug Circuitry
17
Figure 12. SHPC Interface to PEX 8608 Block Diagram
17
JTAG Interface
18
Figure 13. JTAG Interface Block Diagram
18
C Interface
19
PCI Express Lane Good Indicators
19
Figure 14. I 2 C Interface Block Diagram
19
Debug Functions
20
Table 2. Cross-Reference of Ball Names and Related Debug Signal Names
20
PEX 8608 Strapping Balls
22
Table 3. Strapping Balls
22
Power Supplies, Sequencing, and De-Coupling
23
Power Supplies
23
Power Sequencing
23
Board-Level De-Coupling
23
Figure 15. Power Plane Impedance Versus Frequency
24
Figure 16. Capacitor Footprint Effects on Series Inductance
25
References
26
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