M24256E-F datasheet(45/46 Pages) STMICROELECTRONICS

45 / 46 page

List of figures

Figure 1.

Logic diagram..................................................................... 2

Figure 2.

5-pin package connection ............................................................ 3

Figure 3.

8-pin package connections, top view ..................................................... 3

Figure 4.

Block diagram .................................................................... 6

Figure 5.

I2C bus protocol ................................................................... 9

Figure 6.

Write mode sequence with WC = 0 (data write enabled)....................................... 13

Figure 7.

Write mode sequence WC = 1 (data write inhibited).......................................... 14

Figure 8.

Write cycle polling flowchart using ACK .................................................. 16

Figure 9.

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

Figure 10.

Write configurable device address register with DAL=1 or hard write protected with WC line driven high ..... 18

Figure 11.

Read mode sequences ............................................................. 19

Figure 12.

Random read identification page....................................................... 21

Figure 13.

Read lock status with identification page unlocked .......................................... 22

Figure 14.

Read lock status with identification page locked ............................................ 22

Figure 15.

Random read on configuration device address register ....................................... 23

Figure 16.

AC measurement I/O waveform ....................................................... 26

Figure 17.

Maximum Rbus value versus bus parasitic capacitance (Cbus) for an I2C bus at maximum frequency fC = 400 kHz

.............................................................................. 30

Figure 18.

Maximum Rbus value vs. bus parasitic capacitance (Cbus) for an I2C bus at fC = 1MHz.................. 30

Figure 19.

AC waveforms ................................................................... 31

Figure 20.

SO8N – Outline .................................................................. 32

Figure 21.

SO8N - Footprint example ........................................................... 33

Figure 22.

TSSOP8 – Outline ................................................................ 34

Figure 23.

TSSOP8 – Footprint example ......................................................... 35

Figure 24.

UFDFPN8 - Outline ................................................................ 36

Figure 25.

UFDFPN8 - Footprint example ........................................................ 37

Figure 26.

UFDFPN5 - Outline ................................................................ 38

Figure 27.

UFDFPN5 - Footprint example ........................................................ 39

M24256E-F

List of figures

DS12687 - Rev 3

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