Clock Talk LIVE Schedule Presentation will begin shortly

Clock Talk LIVE Schedule – Presentation will begin shortly

Tuesday, Sept 15th IEEE 1588 Timing Solutions for Non-Telecom Applications

Tuesday, Sept 29th Clock Jitter Demystified and Jitter Requirements for 56/112 SerDes

Tuesday, Oct 13thDesign Considerations When Selecting a XO/VCXO Clock Reference for 56G/112G SerDes

Tuesday, Oct 27thStop Guessing, Use Silicon Labs’ Timing Tools to Build Your Clock Tree

Tuesday, Nov 10thOptimize Timing Solutions for High Speed FPGA and Application Processor Designs

Tuesday, Nov 17th PCIe Gen 4/5/6 Specifications and Jitter Measurement Explained

Tuesday, Dec 1st Timing Solutions for 5G O-RAN Systems

Tuesday, Jan 12th AEC-Q100 Timing Products for Automotive Applications

Tuesday, Jan 26th Timing Solutions for Open-Compute Systems

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Register for the series at: https://www.silabs.com/clock-talk

https://www.silabs.com/clock-talk

WELCOME SILICON LABS LIVE

Internet Infrastructure andIndustrial Automation Tech Talks

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WELCOMEStop Guessing, Use Silicon Labs’ Timing Tools to Build Your Clock Tree

Tim Paluck| Applications EngineerDaniel De Godoy | Applications Engineer

▪ ClockBuilder Pro Capability Overview

▪ ClockBuilder Pro Live Demo

▪ PCIe Clock Jitter Tool Capability Overview

Agenda

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▪ Which is the right part for me?

▪ How can I optimize a configuration for my application?

▪ Will this configuration meet my system requirements?

Challenges When Selecting a Reference Clock

CBPro – Single Tool Supports All Stages of a Timing Design

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Product Selection

“I know what I need, but I don’t know which product to pick.”

Device Configuration“Timing is not my area of expertise, how do I optimize this part for my application?

Hardware Validation and Debug

“This is an important project, I need to make sure it works right the first time”

System Interface

“I want this device to just power up and go”

Product Selection

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Product Selection





System Interface


Product Selection

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silabs.com/timing

Timing Solutions: Product Selector Guide

ClockBuilder Pro

http://www.silabs.com/timing

Device Configuration

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Product Selection





System Interface


Device Configuration Wizard

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▪ The CBPro wizard breaks configuration into related and manageable chunks

▪ Leads the user through a logical step by step configuration process

▪ Focuses on features relevant only to prior design choices

Automatic Optimal Device Configuration

▪ Many features have "set for me" options to auto select configuration options based on overall design and other user input

▪ Frequency planner automatically selects dividers that yield best performance

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Dimmed items are set automatically

Design Rule Checks (DRCs)

▪ CBPro checks your configuration for errors and potential issues (warnings) in real-time

▪ Always visible DRC widget provides centralized clearing house for errors and warnings, making it easy to track whether your design is issue free

▪ Also included in design report

▪ You must review and approve if custom part number is created

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System Interface

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Product Selection



Hardware Validation & Debug


System Interface


Export or OPN?

▪ Exports are used with either blank or Silicon Labs factory-programmed devices by system-designers to program during system operation

▪ OPN’s are used to create Silicon Labs factory-programmed devices and will start-up with this configuration

▪ System-designers will choose either or both depending on their implementation requirements

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Silicon Labs

0xff

Export File

Create Custom Part Number

for Your Configuration

Export for

In-System Programming

Export or OPN?

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Export tools support creating simple "script" files that can be written to device by micro-controller to fully reconfigure a device

OPN Generation is required to create pre-programmed devices containing customized plans


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Product Selection





System Interface


CBPro Supports Timing Evaluation

▪ With a Silicon Labs Timing EVB, a system-designer can evaluate their design in real-time in the comfort of their own lab

▪ System-designers can confidently predict system-level performance and then deploy the very same design that they proved with the EVB

▪ The Field Programmer enables designers to quickly burn sample parts with custom configurations, speeding up the prototyping cycle.

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Evaluate

Silicon Labs EVB

Field Programmer

Socket + Blank Part

Create Samples

CBPro EVB Support

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CBPro EVB GUI

USB Control

▪ The CBPro EVB GUI simplifies the validation process by providing intuitive EVB control

▪ Write Project Files

▪ Monitor Power

▪ Read/Write DUT registers

Analyze Any Configuration on the Bench

The CBPro Field Programmer (CBPROG-DONGLE)

▪ The Field Programmer enables CBPro functionality anywhere!

▪ Read/write settings and registers

▪ Burn the NVM of blank devices

▪ Write a CBPro project file

▪ Flash firmware and configuration

▪ Communicate with in-system soldered down devices using a standard 10-pin header and a ribbon cable

▪ Pair it with a socket adapter to program the NVM of loose samples

▪ See UG286 for a detailed User’s Guide

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https://www.silabs.com/documents/public/user-guides/ug286-clockbuilderpro-dongle.pdf

CBPro – Single Tool Supports All Stages of a Timing Design

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Product Selection





System Interface


Clock Builder Pro Live Demo

The most

complete

and easy to use

PCIe Reference Clock Compliance Tool

Silicon Labs PCIe Clock Jitter Tool

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Download it free at:https://www.silabs.com/timing/pci-express-learning-center

1. Includes all Reference ClockRequirements from the PCI-SIG Standard

2. Checks all the requirementslisted in the standard from real world bench measurements

3. Easy-to-use interface and detailed compliance report

Validate, compare, and debug PCIe Timing Solutions!

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Simplifies PCIe compliance bench testingHere is what the Silabs PCIe Clock Jitter Tool does for you:

PCIe Reference Clock Jitter Measurements

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https://www.silabs.com/support/training/fast-and-easy-measurements-with-pcie-clock-jitter-tool

▪ Introduction the PCIe Clock Jitter Tool

▪ Detailed Demo

Complete Signal Integrity

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ALL PCIe Signal Integrity specs are automatically measured by the Tool

▪ If single-ended waveforms are used as inputs

What is new on the PCIe Clock Jitter Tool

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Time Domain or Phase Domain Inputs

Automatic Noise Folding Correction

Mid-Bus Probing Capability

Scope Noise Correction

Phase Noise Analyzer Oscilloscope

Time Domain or Phase Domain Jitter Measurement

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“Jitter measurements may be used with a Phase Noise Analyzer (PNA) extending (flat) and integrating and folding the frequency content up to an offset from the carrier frequency of at least 200 MHz (at 300 MHz absolute frequency) below the Nyquist frequency.”

PCI-SIG GEN5 Table 8-18, note 2

Phase Noise Analyzer

Oscilloscope

The Silabs Clock Jitter accepts both• Time-Domain capture from your oscilloscope• Phase-Domain measurement from your PNA

Both are valid, but they are fundamentally different measurements:

• Phase-Domain → Analog Jitter Measurement• Time-Domain → Sampled Jitter Measurement

For Phase-Domain jitter measurements, the PCI-SIG requires a noise folding correction

• Emulates high-frequency content being folded back to in band

Phase Noise with Folding Correction

Automatic Noise Folding Correction on Phase-Domain Data

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50MHz 100MHz 150MHz 200MHz

1fold 2fold 3fold

50MHz

Ph

ase

no

ise

Ph

ase

no

ise

20 ∗ 𝐿𝑂𝐺(𝑆𝑄𝑅𝑇(10^(𝑅𝑎𝑤 𝑃ℎ𝑎𝑠𝑒 𝑁𝑜𝑖𝑠𝑒/10) + 3 ∗ 10^(−134/10)))

Measured Noise Floor 50MHz

Ph

ase

no

ise

3 Folded Noise Floor

Raw phase noise

Phase noise with folding correction

The Silabs Clock Jitter automatically applies the noise folding correction• The user can select the number of folds → PCI-SIG recommends 3

It is done in 3 steps:1. Noise floor detection and flat extension 2. Folding of the high-frequency noise in band 3. Addition of the folded noise power to the raw

PNA measurement

Raw phase noise

Mid-Bus Probing Capability

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PCB

Ref Clock Ref Clock Receiver

Closest probing point to the load at Mid-Bus

Mid-Bus Probing Load Probing

Automatically sets the threshold that allows jitter measurements even with

significant reflections

Clock Trace

Via

The Silabs Clock Jitter can adjust the threshold when it is not possible to probe at load• Probing a mid-bus can distort the signal, causing multiple 0V crossing whiting a single period

To avoid erroneous period calculations the tool:• Allows the user to manually shift the threshold used to detect edges• Has an internal algorithm that looks for the optimal threshold location to optimize jitter

measurement

Scope Noise Correction

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ADC

SCOPE

*

Ref Clock Scope Voltage Noise

Vo

ltag

e

Time

Original Ref Clock

Ref Clock + Scope Noise

Threshold

Scope Noise = Instrument added Jitter

New Method that allows you to measure and correct the Scope noise contribution to the final RMS jitter!

The Silabs Clock Jitter offers a new method to estimate and correct added jitter oscilloscope measurements

• All ADCs add voltage noise to their readings → Quantization Noise, Input referred Noise etc.• That noise, when near the threshold voltage, will add jitter to the measurement• For Gen4/5 devices, the typical scope noise is significant when compared to the devices real jitter

The new instrument noise correction automatically calculates the add scope jitter from a grounded measurement, and corrects that value from a Ref. Clock jitter measurement

Scope Noise Removal: Experimental Data

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The Silabs Clock Jitter offers a new method to estimate and correct added jitter oscilloscope measurements

• All ADCs add voltage noise to their readings → Quantization Noise, Input referred Noise etc.• That noise, when near the threshold voltage, will add jitter to the measurement• For Gen4/5 devices, the typical scope noise is significant when compared to the devices real jitter (~40%)

0.000

0.050

0.100

0.150

0.200

0.250

0.300

0.350

0.400

0.450

0 1 2 3 4 5 6

PC

Ie G

en5

Max

RM

S H

F (p

s)

Device

MSO 50 SSOFF

MSO 50 SSOFF SNR

MSO PRB SSOFF

MSO PRB SSOFF SNR

PN 0 FOLD

PN 3 FOLD

DSA 50 SSOFF

DSA 50 SSOFF SNR

PCIe Gen5 Limit

Silabs PCIe Clock Jitter Tool Scope Noise Removal

Si52200 Si5332 EX NO Si5332 EX O0 Si5332 IX NO Si5332 IX O0

Summary

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1. Complete Signal Integrity Measurements

2. Jitter Measurements

a) Time Domain versus Phase Domain Jitter Measurement

b) Noise Folding

c) Mid-Bus Probing

d) Scope Noise Removal

Clock Talk:PCIe Gen 4/5/6 Specifications and Jitter Measurement Explained

TUES, NOV 17TH AT 9:00 CST/16:00 CETWEDS, NOV 18TH AT 10:30 HKT

▪ Download ClockBuilder Pro HERE

▪ CBPro Tools & Support for In-System Programming

▪ Command Line Interface (CLI) User’s Guide

▪ ClockBuilder Pro Field Programmer (CBPROG-DONGLE) product page

▪ Download the PCIe Clock Jitter tool HERE

▪ Watch the PCIe Clock Jitter Tech Talk HERE

Additional Resources

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https://www.silabs.com/products/development-tools/software/clockbuilder-pro-software

https://www.silabs.com/products/development-tools/timing/cbprogrammer

https://www.silabs.com/timing/pci-express-learning-center

https://www.silabs.com/support/training/fast-and-easy-measurements-with-pcie-clock-jitter-tool



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Thank you!



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Q&A

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