M95040-DRDW4TP datasheet(13/41 Pages) STMICROELECTRONICS

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M95040-A125 M95040-A145

Operating features

3.5

Identification page

The M95040-A125 and M95040-A145 offer an Identification page (16 byte) in addition to the

4 Kbit memory. The Identification page contains two fields:

•

Device identification: the three first byte are programmed by STMicroelectronics with

the Device identification code, as shown in Table 4.

•

Application parameters: the bytes after the Device identification code are available for

application specific data.

Note:

If the end application does not need to read the Device identification code, this field can be

overwritten and used to store application-specific data. Once the application-specific data

are written in the Identification page, the whole Identification page should be permanently

locked in Read-only mode.

The Read, Write, Lock Identification Page instructions are detailed in Section 4: Instructions.

Table 3. Write-protected block size

Status Register bits

Protected block

Protected array addresses

BP1

BP0

None

Upper quarter

180h-1FFh

Upper half

100h - 1FFh

Whole memory

000h - 1FFh plus Identification page

Table 4. Device identification bytes

Address in

Identification page

Content

Value

00h

ST Manufacturer code

20h

01h

SPI Family code

00h

02h

Memory Density code

09h (4 Kbit)

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