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M95040-DRMF3TP датащи(PDF) 13 Page - STMicroelectronics

номер детали M95040-DRMF3TP
подробное описание детали  Automotive 4-Kbit serial SPI bus EEPROMs
PDF  41 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M95040-DRMF3TP датащи(HTML) 13 Page - STMicroelectronics

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M95040-A125 M95040-A145
Operating features
40
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
0
0
None
None
0
1
Upper quarter
180h-1FFh
1
0
Upper half
100h - 1FFh
1
1
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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