M24256X-F datasheet(38/42 Pages) STMICROELECTRONICS

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Contents

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

Signal description .................................................................4

2.1

Serial Clock (SCL).............................................................. 4

2.2

Serial Data (SDA) .............................................................. 4

2.3

VSS (ground) .................................................................. 4

2.4

Supply voltage (VCC) ........................................................... 4

2.4.1

Operating supply voltage (VCC) ............................................. 4

2.4.2

Power-up conditions ...................................................... 4

2.4.3

Device reset ............................................................ 4

2.4.4

Power-down conditions .................................................... 4

Memory organization ..............................................................5

Device features ....................................................................6

4.1

Identification page .............................................................. 6

4.2

Configurable device address register (CDA) ........................................ 6

4.3

Software write protection register (SWP) ........................................... 7

Device operation ..................................................................9

5.1

Start condition ................................................................. 9

5.2

Stop condition ................................................................. 9

5.3

Data input.................................................................... 10

5.4

Acknowledge bit (ACK)......................................................... 10

5.5

Device addressing............................................................. 11

Instructions ......................................................................12

6.1

Write operations on memory array ............................................... 12

6.1.1

Byte Write ............................................................. 13

6.1.2

Page Write ............................................................ 14

6.1.3

ECC (Error Correction Code) and Write cycling ................................ 15

6.1.4

Minimizing Write delays by polling on ACK .................................... 15

6.2

Write Identification Page........................................................ 17

6.2.1

Lock Identification Page .................................................. 17

6.3

Write operations on configurable device address register ............................ 18

M24256X-F

Contents

DS12380 - Rev 2

page 38/42

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