Of the many reasons driving development of standards, two of the most important are: 1) Enabling development of distinct yet "plug compatible" implementations; and 2) Encapsulating functionality to create a "building block" that can be used in a wide variety of systems. These two goals can conflict with each other in unexpected ways as the types of systems using the standard evolve. In this presentation, Perry Keller of the UFSA examines the UFSA's learnings in preparing to support logo certification testing of the recently adopted UFS card standard.

1. Key Learnings in
Creating the UFS
Compliance Test
Program
Perry Keller
Digital Applica+ons and Standards Program Lead and Memory Program Manager
Chair – JEDEC JC64.5 UFS Measurement CommiDee
Chair - UFSA Compliance CommiDee
Member – JEDEC and UFSA Board of Directors
MIPI / UFSA Liaison

2. UFS: A Very Different Animal
! New technical paradigms
! Microwave speed digital signaling
! Server class storage functions in fingernail sized packages on a battery
budget (“SSD for Mobile”)
! New organizational and cultural paradigms
! Combines technology from at least four independent SSOs and trade
associations targeting very different markets
! Serves both embedded and open systems
! First new consumer mass-market technology in 15-20 years (USB 1996,
HDMI 2003)
! Ecosystem enablement is key to success
2

3. Compliance Program Requirements
! Assure devices and hosts interoperate reliably
! Maximize developer benefits, minimize cost
! Promote rapid advancement of underlying specifications
and consistent procedures across the industry
! Assure ultimate integrity of the logo
! Utilize an open process from start to finish
3

4. Industry Best Practices
! Independent 3rd party testing (no “self certification”)
! Site and staff specific
! Physical audit and inspection
! Time limited
! Applies to test procedures and tools as well
! Multi-level certification
! IP, physical components for differentiation
! Complete hosts/devices for end-user confidence
! Balanced approach
! Certification by similarity focuses on distinctions that make a difference
! Compliance Test Matrix designed for high coverage while minimizing redundancy
! Monte Carlo interoperability testing covers the known and unknown
! Strict confidentiality
! Results for participant only
! Participant confidentiality until critical mass achieved
4

5. UFS Compliance Test Architecture
5
Opera+ng System
File System
Driver Stack
UFS HCI
UFS Device
HCI Compliance Test
Execu+ve
Test Driver
UFS HCI
Emulated UFS Device
Interop Test Execu+ve
Emulated UFS Host
UFS Device
Test Execu+ve
Device Test System Interop Test Host Test
Verifies compliance with key elements of the UFS,
UniPro and M-PHY specificaDons.
Verifies overall system integrity and covers
otherwise unreachable implicit requirements.
CerDficaDon of instrumentaDon and independent 3rd party test centers
Determinis+c coverage of func+on points Monte Carlo test of en+re system

6. Compliance Test Matrix
Developed by the UFSA Compliance Committee, reviewed by MIPI
6
Test only the modes used
by UFS
Golden Devices Host DUTs
Golden Hosts Device DUTs
UFS
UF
S
UF
S
UFS
UFS Compliance Test Matrix for
host and device tesDng
Reduce test
redundancy
Interoperability test
configuraDons

7. UFS Logo Certification Process
7
UFS Test Spec
Compliance
Certificate
Logo License
logo assures user that all
compliance tests passed
M-PHY/UniPro
Test Procedures
UFS
Compliance
Test Spec
UFS Test Procedures
Adopter Member
Products
Compliance
CommiPee
Board of
Directors
Plugfests &
Accredited Labs
* JEDEC, MIPI Alliance and UFSA logos are the property of their respective organizations

8. UFS Card Changes Everything
8 Page 8
Mobile & IoT Forum
9/15/16
Host and device integration
by end user
Upgraded phone
or memory
First purchase
Host and device tested
together at factory
First purchase
New host design
New card design

9. Impact on Compliance Architecture
9
Opera+ng System
File System
Driver Stack
UFS HCI
UFS Device
HCI Compliance Test
Execu+ve
Test Driver
UFS HCI
Emulated UFS Device
Interop Test Execu+ve
Emulated UFS Host
UFS Device
Test Execu+ve
Device Test System Interop Test Host Test
Verifies compliance with key elements of the
UFS, UniPro and M-PHY specificaDons.
Verifies overall system integrity and covers
otherwise unreachable implicit
requirements.
CerDficaDon of instrumentaDon and independent 3rd party test centers
Framework for Bench Characteriza+on OTen Sufficient
Proves “UFS-ness” Increase coverage @ low cost
Embedded:
Exposed:

10. 2H
2014
Jedec
Industry
UFSA
FPGA Prototype
2015
UFS Industry Timeline
10
21
UFS roadmap informa+ve only and no guarantee on schedules
MIPI
M-PHY 3.0
UFS CTS 1.0
UFS/HCI 2.0
CTS 0.56
2016
M-Phy Test 1.0
Golden Candidates
Solicited
2017
Prototypes
Solicited
2H 1H
Unipro 1.61
1H
1st ATC
UFS 2.1
Unipro Test 1.61
UFS Card 1.0
UFS CTS 2.0
UFS Compliance Test
Matrix (CTM) 0.8
First Logo
CerDficaDon
1H
CTM 1.0 CTM 0.9
2013
2012
2011
2010
Workshops
“Test the Tests”
UFS CTS 2.1
UFS 3.0
Unipro 1.8
Unipro Test 1.8
eUFS UFS Card 1.0
ATC CerDficaDon
“Test the Testers”
M-PHY 4.0
CTM 1.0

11. Key Learnings
! Characterization procedures don’t necessarily map to
compliance test
! Different goals
! Overlap
! Precision
! Test the tests
! DFT factoring requirements are different for
! Embedded vs. Open
! Module vs. System
11

12. Physical Layer Testing
! Typical platform components:
! Metrology grade test fixtures
! Oscilloscopes
! Bit Error Rate Testers
! Waveform generators
! Network Analyzers
! Time Domain Reflectometers
! Scope of testing
! M-Phy Tx
! M-Phy Rx
! UFS channel (Tx ball to Rx ball)
! Power integrity (future)
13

13. Protocol Testing
! Typical platform components:
! Host, Device, snoop test fixtures
! Oscilloscope protocol decoder
! Protocol analyzer
! Protocol generator/exerciser
! Instrumented “golden” hosts and devices
! Scope of testing
! Unipro
! UFS Transport Layer (UTP)
14

14. Interoperability Testing
! Typical platform components:
! Host, Device, snoop test fixtures
! Set of “Golden” hosts (for device test)
! Set of “Golden” devices (for host test)
! Host test application or procedures
! Phy/Protocol test equipment (for debugging)
! Scope of testing
! Complete UFS HW/SW stack
! Interoperation with defined set of “Golden” hosts/devices
15
UFS
UF
S
UF
S
UFS

15. UFS Interoperability Universe
16
Standards
Memory
IP
SoC
Interconnect
Hosts
Reliable implementation of standards is essential
Millions of
possible
combinaDons!
Thousands of
component
designs…