Kria SOM Carrier Card Design Guide (UG1091)

Document ID: UG1091
Release Date: 2023-05-25
Revision: 1.4 English

Introduction
Electrical Design Considerations
SOM Connector Overview
Signal Naming Conventions
SOM240_1 Connector Pinout
SOM240_1 Signal Names and Descriptions
SOM240_2 Connector Pinout
SOM240_2 Signal Names and Descriptions
Supported I/O Standards
Signal Routing Guidelines
MIO Signals
HDIO Signals
HPIO Signals
PS-GTR Transceivers
GTH Transceivers
Transceiver Reference Clocks
I/O Constraints Definition
SOM I/O Timing Model
SOM I/O Drive Strength Definition
SOM Configuration and Control Signals
Sideband Signals
Power Management Signals
SOM MIO Design Considerations
SOM Power
SOM Connector Power Pins
Power Management
Power Sequencing
Power Telemetry
Voltage Rail Monitoring
SOM Power Integrity
SOM Power Estimation
K26 SOM Mechanical Design Considerations
K26 SOM Mechanical Dimensions
PCB Fabrication and Assembly House Requirements
SOM to Carrier Card Samtec Connector Placement Guidelines
Carrier Card Board to Board Connector Placement Guideline
Board to Board Connector Distance Tolerance Control
Board to Board Connector PCB Layout
Board to Board Connector Stencil Design
Recommended Pb-free Reflow Soldering Profile
Carrier Card to SOM Standoff Press-fit Process
Board to Board Assembly Guidelines
Mating: JSOM Standoff-nut Tighten Sequence and Torque Setup
De-mating: JSOM Standoff-nut and Jack Screw Untighten Sequence
SOM System B2B Connector Assembly Validation-DOE (To Ensure Time 0 No Crack)
Hardware Configuration Using Vivado Tools
Vivado Tools Board File
Vivado Software SOM Connector Abstraction
SOM Vivado Tools XDC Files
Additional Resources and Legal Notices
Finding Additional Documentation
Support Resources
References
Revision History
Please Read: Important Legal Notices

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