Xilinx Kria K26 SOM User Manual

Table of Contents
Revision History...............................................................................................................2
Chapter 1: Introduction.............................................................................................. 5
Chapter 2: Electrical Design Considerations................................................... 7
SOM Connector Overview.......................................................................................................... 7
Signal Naming Conventions.......................................................................................................7
SOM240_1 Connector Pinout..................................................................................................... 8
SOM240_2 Connector Pinout................................................................................................... 17
Supported I/O Standards......................................................................................................... 25
Signal Routing Guidelines........................................................................................................ 25
SOM Configuration and Control Signals................................................................................ 28
SOM MIO Design Considerations............................................................................................32
SOM Power.................................................................................................................................34
Chapter 3: Mechanical Design Considerations............................................ 37
Mechanical Dimensions............................................................................................................37
PCB Fabrication and Assembly House Requirements.......................................................... 39
SOM to Carrier Card Samtec Connector Placement Guidelines..........................................40
Carrier Card Board to Board Connector Placement Guideline............................................41
Recommended Pb-free Reflow Soldering Profile..................................................................47
Carrier Card to SOM Standoff Press-fit Process.................................................................... 49
Board to Board Assembly Guidelines..................................................................................... 50
Mating: JSOM Standoff-nut Tighten Sequence and Torque Setup......................................52
De-mating: JSOM Standoff-nut and Jack Screw Untighten Sequence ............................... 53
SOM System B2B Connector Assembly Validation-DOE (To Ensure Time 0 No Crack).....54
Chapter 4: Hardware Configuration Using Vivado Tools........................55
Vivado Tools Board File.............................................................................................................55
Vivado Software SOM Connector Abstraction....................................................................... 56
SOM Vivado Tools XDC Files.....................................................................................................56
Appendix A: Additional Resources and Legal Notices............................. 57
UG1091 (v1.0) April 20, 2021 www.xilinx.com
Carrier Card Design for Kria SOM 3
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Xilinx Kria K26 SOM Specifications

General

Brand	Xilinx
Model	Kria K26 SOM
Category	Carrier boards
Language	English