Introspect C-PHY User Manual

MIPI C-PHY Transmitter
Conformance Test Suite

User Guide

Table of Contents

2

Table of Contents

Table of Contents .......................................................................................................................................... 2

List of Figures ................................................................................................................................................ 3

Introduction .................................................................................................................................................. 4

Features .................................................................................................................................................... 4

Hardware Setup and Global Method of Implementation ............................................................................. 5

CTS Application User Interface ..................................................................................................................... 9

Component Classes Visible to the User .................................................................................................... 9

CTS Options Component ....................................................................................................................... 9

Test Case Suite .................................................................................................................................... 10

User-Editable Initialization Function ................................................................................................... 10

Selecting the General Options for the Test............................................................................................. 10

Identifying Which Tests to Execute ......................................................................................................... 11

Confirming DUT Connections .................................................................................................................. 12

Entering Custom Code for Initializing the DUT ................................................................................... 13

Getting More Help ...................................................................................................................................... 14

Table of Contents

3

List of Figures

Figure 1 Overall hardware setup for C-PHY Transmitter CTS testing. ........................................................ 5

Figure 2 Overall Method of Implementation involves performing waveform captures and extracting

measurements. Illustration is shown for CTS Test #1.2.2. ............................................................................ 6

Figure 3 Illustration of single-ended measurements. ................................................................................ 7

Figure 4 Hardware setup with attenuators in the signal path. .................................................................. 8

Figure 5 Illustration of the C-PHY Transmitter CTS Test Procedure when opened in IntrospectESP

software. ....................................................................................................................................................... 9

Figure 6 High-level automation options are configured using the ctsOptions data record. ................... 11

Figure 7 Illustration of the Test Case Suite GUI with a listing of all available tests. ................................ 11

Figure 8 Alternative graphical views of the Test Case Suite Window. ..................................................... 12

Figure 9 Illustration of the pop-up dialogs with connection instructions. ............................................... 12

Figure 10 User-editable code area for automatically initializing the test flow or the DUT. .................... 13

C-PHY Transmitter CTS User Guide

4

Introduction

The Introspect C-PHY Transmitter CTS Application is a Test Procedure that
executes within the IntrospectESP software environment and that enables
automated testing of C-PHY transmitters using the Introspect SV3C CPRX 4­Lane MIPI C-PHY Analyzer. The Test Procedure provides a fast and easy way to
validate and debug C-PHY links as well as execute automated C-PHY electrical
checklists based on the MIPI Alliance Conformance Test Suite.

The Introspect C-PHY Transmitter CTS Application enhances your productivity
and saves valuable time by allowing you to focus on the device under test (DUT)
specific steps of transmitter testing without worrying about test system
programming. It provides an easy to use interface for selecting and sequencing
tests and gives you visibility into the code structure and execution flows.

The Application also includes report generation features and custom code
sections that allow you to achieve true test automation – through a true
software handshake. Specifically, the custom code sections are compatible with
executing external scripts for controlling a device or for accessing your
proprietary .NET DLL for DUT control.

Features

The Introspect C-PHY Transmitter CTS Application offers

• MIPI specification coverage for C-PHY v1.0, v1.1, and beyond

• Configurable lane count and data rate

• Configurable test pattern / packet construction including arbitrary video

frames

• User selection of tests based on the CTS test groups

• User-editable custom code for manipulating external components such

as power supplies, device handlers, or thermal units

• Report generation

• Enhanced debug modes

C-PHY Transmitter CTS User Guide

5

Hardware Setup and Global Method of Implementation

Figure 1 shows the hardware setup for transmitter tests in general. All lanes of
Introspect SV3C CPRX analyzer are connected directly to the Device under Test
(DUT) board. The SV3C CPRX is connected to the control Computer through a
USB cable and provided software drivers; and the DUT is connected to the
control Computer using its own mechanism (e.g. I2C to USB converter). In the
rest of this document, we assume that the DUT is connected to the same control
Computer as the SV3C CPRX, but this is generally not a requirement for the
Introspect CTS Application.

Figure 1 Overall hardware setup for C-PHY Transmitter CTS testing.

Noteworthy!

The SV3C MIPI C-PHY Analyzer contains built-in
dynamic termination circuitry as shown in the
figure on the right. Thus, unlike conventional
oscilloscopes or analyzers, it can be used to
directly connect to a MIPI device evaluation board
using coaxial cables, without requiring an external
Reference Termination Board (RTB) nor external
high-impedance probes!

This architecture results in faster setup time, lower
overall cost of test, and less potential for
connection issues.