USB PD (Power Delivery)

USB Power Delivery (USB PD) is a protocol based on Biphase Mark Coding (BMC) used in devices like laptops, tablets, mobile phones, power banks, and other USB Type-C enabled devices for power supply and charging. With USB Type-C, the maximum power delivery can reach up to 240W, allowing users to charge supported devices via a USB Type-C connector.

The USB PD 3.1 specification builds on the original USB PD 3.0 by defining two power ranges: the Standard Power Range (SPR), which maintains a maximum of 100W, and the Extended Power Range (EPR), which increases the available power.

Logic Analyzer / MSO

Support Version: USB PD 3.1 ( Version1.0, Revision 3.1 ) or lower.

TB3016B

TB3000 series Specifications PDF

MSO3124B (w/ analog channels)

MSO3000 series Specifications PDF

MSO3124B Live mode

TB3016B / MSO3124B Logic Analyzer

TB3016B / MSO3124B Protocol Analyzer

MSO3124B digital + analog channels

USB Type-C Fixture

Acute offers an optional USB Type-C Fixture to measure the USB PD signal by connecting the CC1 or CC2 and the ground pins with its logic analyzer.

*It contains both SBU pins & CC pins.

USB PD Decoding Setup Steps

1. Click Quick Settings or Add Protocol Decode to select a protocol for logic analyzer capture.

2. Select USB PD for decoding.

3. If you use Quick Settings, the system will recommend configurations for trigger type, sampling rate, voltage threshold, and channel settings.

4. Click the icon to access the Decode Settings screen.

Decode Settings

Channel: Set Configuration Channel (CC) CC1 & CC2.

VDM: Use the vendor defined message function when checked; users could define the SVID/Command of the Structured VDM by Edit/Refresh.

Details Report: Show the details of bit parsing for the Data Obj(s) frame.

Show 5b value in waveform window: Show 4b or 5b value in the waveform.

YouTube Video

USB PD Decoding Example