```html

Power & Boot Sequence Practical Measurement:
The first signal determines the fate of your system

In embedded system design, the Power Sequence and Boot Sequence immediately after power application are the first critical step for system stability.
From multi-voltage rail timing and clock jitter to DC ripple and ground noise — we'll cover measurement points that are easy to overlook, using practical, hands-on expertise.

This webinar covers practical measurement techniques using test equipment such as oscilloscopes and spectrum analyzers, along with core concepts of Power Integrity (PI) and Signal Integrity (SI).

Power Sequence · Boot Sequence

Oscilloscope Practical Measurement

DC Ripple · Ground Noise

PI · SI

Key Topics

Seminar Curriculum

Embedded System Block Diagram Configuration

Understand the roles and interactions of the power, system, and peripheral blocks, and examine critical measurement points in each domain.

Power block — PMIC, LDO, DC/DC converter (Buck/Boost), sequencing logic
System block — CPU/SoC (ARM Cortex), Flash, RAM (DDR3L)
Peripheral block — Display (LVDS/MIPI), motor driver, communication modules (UART/USB/Ethernet)
Ground noise caution zones during high-current switching

PMIC LDO Buck · Boost SoC · DDR3L

Power Tree and Power Sequence

Understand the application sequence and timing requirements of multiple voltage rails, and learn methods to verify critical measurement points in the boot sequence.

Timing Accuracy (delay) and monotonic rise verification of voltage ramp curves
PGOOD Assertion — EN to PGOOD timing verification
Reset Vector Fetch — Confirming initial CPU operation timing
Oscilloscope MSO (Logic) channel, analog channel, and Math function measurement techniques

Power Sequence PGOOD Reset Vector MSO

Clock Stability and Phase Noise

Learn how to measure clock jitter and PLL lock time to ensure reliable high-speed data transmission.

Jitter — Managing below 10ps for stable high-speed data transmission
PLL Lock Time compliance — A key indicator of successful boot
Phase Noise measurement — Analyzing crystal oscillator phase noise using a spectrum analyzer (SA)
TIE (Time Interval Error) measurement — Measuring system clock timing error with an oscilloscope

Jitter PLL Lock Time Phase Noise TIE

Signal Measurement Techniques at Boot Time

Share debugging tools and practical tips for the power application process from 12V input through CPU reset release.

Sequence flow — 12V input → DC-DC/LDO → PMIC timing control → CPU reset release
Signal integrity — Rising time (10-90%) setting, skew/delay measurement, hold-off/timeout utilization
Fault detection — I2C/SPI/UART bus decoding and triggering for communication error detection
Waveform improvement — Maintaining probe ground pin integrity, reducing ringing/overshoot considering impedance

Rising Time I2C · SPI · UART Overshoot · Ringing

DC Ripple and Ground Noise

Practical approach to test equipment configuration and measurement techniques for ensuring power quality and ground stability.

Probe selection — Passive 10X → 1X setting, Power Rail Probe utilization for high-frequency measurement
Equipment setup — Bandwidth limit (BW Limit), acquisition mode, Vp-p measurement, histogram analysis
Ground Noise — Monitoring voltage differences between analog and digital grounds, and V_GND offset (bounce)

DC Ripple Power Rail Probe Ground Noise Histogram

Advanced PI vs SI Guide

Summarize core concepts of Power Integrity (PI) and Signal Integrity (SI) to be considered during the high-speed operation phase after boot.

Power Integrity (PI) — CPU core power ripple (<1%), voltage drop, high-speed memory interface
Signal Integrity (SI) — Measuring data delivery capability without attenuation or distortion in high-speed signal connections
Q-Factor — Resonator energy storage and loss indicator, fundamental concept in PI design
Next session preview — Detailed PI/SI analysis and simulation methodology in the frequency domain

Power Integrity Signal Integrity Q-Factor Voltage Drop

Recommended For

Embedded Hardware Design Engineers

Those designing power circuits such as PMIC, LDO, DC-DC converters, or those needing to verify power sequences

Engineers Seeking to Enhance Measurement and Debugging Skills

Those wanting to acquire practical measurement techniques using oscilloscopes and spectrum analyzers, and signal integrity verification methods

Developers Looking to Build PI / SI Fundamentals

Those wanting to apply Power and Signal Integrity concepts to real-world work, including high-speed memory interfaces, clock jitter, and ground noise

```