UFS spec 文档

JEDEC

STANDARD

Universal Flash Storage (UFS)

Version 2.0

SEPTEMBER 2013

JEDEC SOLID STATE TECHNOLOGY ASSOCIATION

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1 Scope 1

2 Normative Reference 1

3 Terms and Definitions 2

4 Introduction 7

4.1 General Features 7

4.2 Interface Features 8

4.3 Functional Features 8

5 UFS Architecture Overview 9

5.1 UFS Top level Architecture 9

5.5 UFS Transport Protocol (UTP) Layer 14

5.5.1 Architectural Model 15

5.6 UFS Application and Command Layer 19

6 UFS Electrical: Clock, Reset, Signals and Supplies 20

6.1 Embedded UFS Signals 20

6.2 UFS Memory Card Signals 21

6.3 Reset Signal 22

6.4 Power Supplies 22

6.5 Reference Clock 23

6.5.1 HS Gear Rates 24

7.1.2 Hardware Reset 29

7.1.3 EndPointReset 30

7.1.4 Logical Unit Reset 31

7.1.5 Other Resets 31

7.1.6 Summary of Resets and Device Behavior 32

7.2 Power up ramp 33