IS66/67WVR4M8ALL/BLL

Integrated Silicon Solution, Inc.- www.issi.com

4

Rev. A2

07/08/2024

TABLE OF CONTENTS

FEATURES ............................................................................................................................................................2

GENERAL DESCRIPTION ....................................................................................................................................3

PERFORMANCE SUMMARY................................................................................................................................3

TABLE OF CONTENTS .........................................................................................................................................4

1.

PIN CONFIGURATION & Descriptions ..........................................................................................................6

2.

Block Diagram.................................................................................................................................................8

3.

Power-up Initialization.....................................................................................................................................9

4.

Interface Description .....................................................................................................................................10

4.1

Address Space.....................................................................................................................................10

4.2

Page Length.......................................................................................... Error! Bookmark not defined.

4.3

DriveR Strength ...................................................................................................................................10

4.4

POWER-ON STATUS .........................................................................................................................10

4.5

Command/Address Latching Truth ......................................................................................................10

4.6

READ/WRITE Termination ..................................................................................................................11

5.

READ/WRITE OPERATIONS.......................................................................................................................12

5.1

SPI READ OPERATIONS ...................................................................................................................12

5.2

SPI WRITE OPERATIONS ..................................................................................................................14

5.3

QPI MODE ...........................................................................................................................................15

5.4

QPI Fast READ Operation ...................................................................................................................16

5.5

QPI WRITE Operation .........................................................................................................................17

5.6

QPI EXIT Operation .............................................................................................................................17

5.7

Read ID Operation ...............................................................................................................................18

5.8

RESET Operation ................................................................................................................................19

5.9

In-BAND RESET Operation .................................................................................................................20

5.10

Deep POWER DOWN MODE .........................................................................................................22

6.

REGISTER....................................................................................................................................................24

6.1 DEVICE IDENTIFICATION REGISTER .................................................................................................24

7.

ELECTRICAL CHARACTERISTICS.............................................................................................................25

7.1

ABSOLUTE MAXIMUM RATINGS (1) ..................................................................................................25

7.2

OPERATING RANGE ..........................................................................................................................25

7.3

DC CHARACTERISTICS.....................................................................................................................26

7.4

AC Measurement Conditions ...............................................................................................................27

7.5

PIN CAPACITANCE (TA = 25°C, VCC=1.8V/ 3V, 1MHz) ...................................................................27

7.6

AC CHARACTERISTICS .....................................................................................................................28

7.7

INPUT/OUTPUT TIMING.....................................................................................................................29

8.

PACKAGE TYPE INFORMATION................................................................................................................30

8.1

8- Contact Ultra-Thin Small Outline No-Lead (WSON) PACKAGE 6X5MM (K)..................................30

8.2

8- Contact Ultra-Thin Small Outline No-Lead (USON) PACKAGE 4X3MM (T) ..................................31