M95256-DF datasheet(47/51 Pages) STMICROELECTRONICS

47 / 51 page

Contents

Description ........................................................................2

Memory organization ..............................................................4

Signal description .................................................................5

3.1

Serial data output (Q) ........................................................... 5

3.2

Serial data input (D) ............................................................ 5

3.3

Serial clock (C) ................................................................ 5

3.4

Chip select ................................................................... 5

3.5

Hold ......................................................................... 5

3.6

Write protect .................................................................. 5

3.7

VCC supply voltage ............................................................ 5

3.8

VSS ground ................................................................... 5

Connecting to the SPI bus .........................................................6

4.1

SPI modes .................................................................... 7

Operating features.................................................................8

5.1

Supply voltage (VCC) ........................................................... 8

5.1.1

Operating supply voltage (VCC) ............................................. 8

5.1.2

Device reset ............................................................ 8

5.1.3

Power-up conditions ...................................................... 8

5.1.4

Power-down ............................................................ 8

5.2

Active power and Standby power modes ........................................... 9

5.3

Hold condition ................................................................. 9

5.4

Status register ................................................................. 9

5.5

Data protection and protocol control .............................................. 10

Instructions ......................................................................11

6.1

Write enable (WREN) .......................................................... 12

6.2

Write disable (WRDI) .......................................................... 13

6.3

Read Status register (RDSR) ................................................... 14

6.3.1

WIP bit ............................................................... 14

6.3.2

WEL bit ............................................................... 14

6.3.3

BP1, BP0 bits .......................................................... 14

M95256-W M95256-R M95256-DF

Contents

DS4712 - Rev 22

page 47/51

M95256-DF 数据表(PDF) 47 Page - STMicroelectronics

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